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Effects Of Banana Peels On Chicken Weight Gain And Egg Production In The Urban And Peri-Urban Areas Of Aksum City, Ethiopia, H. G. Araya, S. G. Gebrekristos, W. V. Oliver Jan 2022

Effects Of Banana Peels On Chicken Weight Gain And Egg Production In The Urban And Peri-Urban Areas Of Aksum City, Ethiopia, H. G. Araya, S. G. Gebrekristos, W. V. Oliver

IGC Proceedings (1977-2023)

High feed cost of running urban-animal-agriculture and huge city wastes are challenges of the growing towns in modern Ethiopia. Egg production microenterprise is steadily growing due to its low initial investment and ready market in urban and peri-urban areas. However, cost of egg production is high due to the rising cost of corn, the main feed ingredient in poultry rations. Using banana peels, which forms a great proportion of city waste in Ethiopia, is seen as a way of not only reducing the waste, but also as an alternative low-cost feed supplement that could help enhance egg production by small-holder …

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Sheep Grazing Patterns For Better Land Management: Adjusting Gps Tracking Protocol, J. Castro, L. M. Godoy, J. P. Castro, M. Castro Jan 2022

Sheep Grazing Patterns For Better Land Management: Adjusting Gps Tracking Protocol, J. Castro, L. M. Godoy, J. P. Castro, M. Castro

IGC Proceedings (1977-2023)

Small ruminant livestock systems in northeast Portugal are an extensive activity based on daily grazing paths across the landscape. The flocks use multiple patches of multiple land cover types in different ways throughout the year. Shepherd and flock interactions determine the resting and feeding spots utilized by sheep and goats according to the biotic and abiotic conditions. Information about the herding home range is central to managing the land use and vegetation cover and optimizing sheep and goats' productivity in traditional systems. This study's main objective is to contribute to calibrate a shepherding GPS protocol to monitor sheep flocks based …

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Restoring Rangelands For Nutrition And Health For Humans And Livestock, I. Öborn, A. Bargués Tobella, G. Bostedt, A. Hörnell, P. Knutsson, K. Lindvall, D. Mpairwe, S. Mureithi, G. Nyberg, Y. Nyberg, B. Schumann, A. Turinawe, T. Vågen, D. Wakjira, L. Winowiecki, E. Wredle Jan 2022

Restoring Rangelands For Nutrition And Health For Humans And Livestock, I. Öborn, A. Bargués Tobella, G. Bostedt, A. Hörnell, P. Knutsson, K. Lindvall, D. Mpairwe, S. Mureithi, G. Nyberg, Y. Nyberg, B. Schumann, A. Turinawe, T. Vågen, D. Wakjira, L. Winowiecki, E. Wredle

IGC Proceedings (1977-2023)

Drylands cover 40% of the global land area and host 2 billion people, of which 90% live in low- or middleincome countries. Drylands often face severe land degradation, low agricultural productivity, rapid population growth, widespread poverty, and poor health. Governance structures and institutions are often eroded. Livestock-based livelihoods, largely depending on seasonal migration are common. Pastoralist communities and their land are highly vulnerable to climate shocks, while there are also changes in land tenure, insecurity/conflicts and rapid infrastructure development. Drylands Transform is an interdisciplinary research project revolving around the UN Sustainable Development Goals (SDGs). The project aim is to contribute …

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Effect Of Seeding Rates On Productivity And Quality Of Alfalfa In Northern Area Of Korea, Jong Geun Kim, C. Liu, S. N. Wei, Y. F. Li, E. C. Jeong, H. J. Kim Jan 2022

Effect Of Seeding Rates On Productivity And Quality Of Alfalfa In Northern Area Of Korea, Jong Geun Kim, C. Liu, S. N. Wei, Y. F. Li, E. C. Jeong, H. J. Kim

IGC Proceedings (1977-2023)

Alfalfa cultivation in South Korea is not common. There are many reasons, but low productivity has been extremely limited. Although alfalfa growth was poor due to boron deficiency in the soil, the problem has recently been solved. Nevertheless, the cultivation of alfalfa is not expanding. About 200,000 tonnes of alfalfa hay are imported every year. Therefore, this study was conducted to find a way to replace imported hay by expanding alfalfa cultivation in Korea. Alfalfa (P5444) was sown in northern part of South Korea (Pyeongchang). Alfalfa was sown in September 2018 with different seeding rates (20, 30 and 40 kg/ha) …

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Effect Of Prompt-Delayed Packaging And Ensiling Time On Fermentation And Aerobic Stability Of Soybean Curd Residue, Ajmal Wali, Takeshi Tsuruta, Naoki Nishino Jan 2022

Effect Of Prompt-Delayed Packaging And Ensiling Time On Fermentation And Aerobic Stability Of Soybean Curd Residue, Ajmal Wali, Takeshi Tsuruta, Naoki Nishino

IGC Proceedings (1977-2023)

Wet soybean curd residue (SCR) obtained from two tofu factories (F1 and F2) was anaerobically stored with or without added beet pulp (BP). Sealing was performed on the day of tofu production (prompt sealing [PS]) or 2 days after SCR was piled and unprocessed (delayed sealing [DS]). Predominant lactic acid fermentation was observed regardless of the sealing time and BP addition. Acinetobacter spp. were the most abundant (> 67%) bacteria in pre-ensiled SCR, regardless of the factory and sealing time. In PS silage, the abundances of typical lactic acid-producing bacteria, such as Lactobacillus, Pediococcus, and Streptococcus spp. reached …

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Effect Of Native Grassland Intensification Over Cattle Performance, N. Caram, F. Casalás, M. Cadenazzi, R. Zanoniani, P. Boggiano Jan 2022

Effect Of Native Grassland Intensification Over Cattle Performance, N. Caram, F. Casalás, M. Cadenazzi, R. Zanoniani, P. Boggiano

IGC Proceedings (1977-2023)

The objective was to evaluate the effect of different levels of intensification in native grassland over cattle live weight gain (LWG), stocking rate (SR) and average daily gain (ADG) in Uruguay. The study was carried out in 7.8 ha in Paysandú, between winter 2015 and autumn 2019. Experiment was a randomized complete block design, with 4 replicates. The four treatments applied were native grassland (NG), NG overseeded with Trifolium pratense (6 kg.ha-1) and Lotus tenuis (6 kg.ha-1) + 40 kg.ha-1 of P2O5 (NGO), NG fertilized with 60 kg.ha-1 of N + …

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The Diversity Of Poisonous Plant Patches In The Arid Rangelands Of Namaqualand, South Africa, T. Jamalie, M. I. Samuels, C. F. Cupido, F. L. Müller, W. L. Engelbrecht, T. Dube, R. S. Knight Jan 2022

The Diversity Of Poisonous Plant Patches In The Arid Rangelands Of Namaqualand, South Africa, T. Jamalie, M. I. Samuels, C. F. Cupido, F. L. Müller, W. L. Engelbrecht, T. Dube, R. S. Knight

IGC Proceedings (1977-2023)

The Namaqualand region in South Africa is part of the richest arid biodiversity hotspot in the world. Plant distribution and diversity here are impacted by various biophysical and anthropogenic factors. In these landscapes, poisonous plant patches, which pose serious threats to livestock, are widespread but their contribution to the regions biodiversity are not fully understood. This study assessed their plant diversity and compared its matrix. This study was conducted in the semi-arid to arid Steinkopf pastoral area located in Namaqualand where livestock is still herded daily. Twenty-five paired sites were selected based on the dominance of poisonous plants within the …

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Isotopic Δ15N Signature Of Grass-Alone And Grass-Legume Tropical Pastures To Estimate Sources Of Nitrogen To Grasses In Farmer Managed Pastures, Daniel M. Villegas, J. Velasquez, J. Arango, K. Obregon, Idupulapati M. Rao, G. Rosas, A. Oberson Jan 2022

Isotopic Δ15N Signature Of Grass-Alone And Grass-Legume Tropical Pastures To Estimate Sources Of Nitrogen To Grasses In Farmer Managed Pastures, Daniel M. Villegas, J. Velasquez, J. Arango, K. Obregon, Idupulapati M. Rao, G. Rosas, A. Oberson

IGC Proceedings (1977-2023)

Vast areas of tropical forest have been converted into pastures sown with introduced grasses (Urochloa spp.). The majority of pastures exist in some stage of degradation, which has dramatic ecological and economic consequences. Our objective was to determine isotopic 15N signature of grass alone and grass-legume pastures to estimate sources of nitrogen (N) to grasses in farmer managed pastures. This work contributes to enhancing the sustainability of tropical pastures in forest margins through the integration of legumes. The overarching hypothesis tested was that legumes associated with grasses will improve nutrient supply via symbiotic fixation and mobilization of soil …

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Influence Of Grazing Intensity On Nutrient Concentrations In Grass Tissue: Evidence From Two Savannah Grass Species, C. Munyati Jan 2022

Influence Of Grazing Intensity On Nutrient Concentrations In Grass Tissue: Evidence From Two Savannah Grass Species, C. Munyati

IGC Proceedings (1977-2023)

High grazing intensity can accelerate the recycling of animal nutrients on savannah rangelands through the deposition of dung and, subsequently, nutrient mineralisation, uptake and concentration in grass tissue. The actual magnitude of this influence can vary depending on the grazing system. This study derived grazing system-dependent magnitudes of the influence of grazing intensity on concentrations of major (N, P, K, Ca, Mg, Na) and trace (B, Co, Cu, Cr, Fe, Mn, Mo, Ni, Se, Zn) animal nutrients in above ground grass tissue. Two grass species were examined: Brachiaria nigropedata, a decreaser, and Eragrostis lehmanniana, an increaser. For the …

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Seasonality And Grazing Management Effect On Growth And Nutritional Composition Of Herbage On Semi-Natural Grasslands Grazed By Dairy Cows In Southwest Germany, E. Velasco, S. Perdana-Decker, J. Werner, U. Dickhoefer Jan 2022

Seasonality And Grazing Management Effect On Growth And Nutritional Composition Of Herbage On Semi-Natural Grasslands Grazed By Dairy Cows In Southwest Germany, E. Velasco, S. Perdana-Decker, J. Werner, U. Dickhoefer

IGC Proceedings (1977-2023)

Natural and semi-natural grasslands represent an attractive forage source for cows in organic dairy farming. Throughout the grazing season, however, diverse factors such as climatic conditions, botanical composition, as well as grazing and herd management, can influence growth and nutritive value of forage on grasslands. We aimed at investigating the influence of seasonality and grazing management in forage growth and nutritional quality in seven commercial organic dairy cattle farms during the grazing season 2019 in South Germany. Therefore, forty exclusion cages (1 m2) were installed on pastures, which were under three different grazing systems: rotational, short-grass, and continuous …

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Effect Of Cutting Stage And Turning Frequency On Nutritive Value And Digestibility Of Two Tropical Forages, M. M. Chiphwanya, F. C. Chigwa, H. D. C. Msiska Jan 2022

Effect Of Cutting Stage And Turning Frequency On Nutritive Value And Digestibility Of Two Tropical Forages, M. M. Chiphwanya, F. C. Chigwa, H. D. C. Msiska

IGC Proceedings (1977-2023)

In Malawi, feed shortage during the dry season (June-October) is a critical factor affecting smallholder dairying. Though suitable improved forages were long introduced, important parameters that indicate forage and hay quality for dry season feeding have been less well studied. This study evaluated the effect of cutting stage and turning frequency at drying of two tropical forages on nutrient composition and digestibility. A 23 factorial experiment laid out in Randomized Complete Block Design was conducted in Mzuzu milk shed area. Centrosema pubescens and Chloris gayana were established on four plots (5m x 3m) each by 24 dairy farmers; two …

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Effect Of Cutting Height On Productivity And Quality Of Alfalfa In Northern Area Of Korea, Jong Geun Kim, C. Liu, S. N. Wei, Y. F. Li, E. C. Jeong, H. J. Kim Jan 2022

Effect Of Cutting Height On Productivity And Quality Of Alfalfa In Northern Area Of Korea, Jong Geun Kim, C. Liu, S. N. Wei, Y. F. Li, E. C. Jeong, H. J. Kim

IGC Proceedings (1977-2023)

Alfalfa is a very important forage for livestock feeding. In particular, due to the high crude protein content, it is widely used as a dairy cattle feeds. However, the cultivation of alfalfa is quite limited and main source is imported hay in Korea. There are many reasons, but most importantly, low productivity due to lack of boron in the soil. This experiment was conducted to expand domestic production and use of alfalfa. Alfalfa was sown in the fall of 2018 at 30 kg/ha seeding rate. Alfalfa was harvested four times (3 May, 2 July, 11 September and 13 October) in …

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Diversity And Taxonomic Identity Of Rumen Bacterial Community In Cattle Fed Different Diets, B. K. Korir, J. K. N. Kuria, D. M. Mwangi, M. M. M. Wanyoike Jan 2022

Diversity And Taxonomic Identity Of Rumen Bacterial Community In Cattle Fed Different Diets, B. K. Korir, J. K. N. Kuria, D. M. Mwangi, M. M. M. Wanyoike

IGC Proceedings (1977-2023)

In this study, the identity of rumen bacterial community and their taxonomic classification in Zebu heifers (n=24) fed 4 different diets (range grasses, Bracharia MulatoII, Azolla and Cassava leaf meal) was surveyed using metagenomics sequencing of the 16SrRNA gene. Rumen liquor samples were collected from the heifers from which a total of 192 DNA samples were amplified and the resulting 16S rRNA sequences compared to the existing sequences at the National Centre for Biotechnology Information (NCBI) BLAST database through the MetagenAssist . Bioinformatics analyses indicated that 17 operational taxonomic units (OTUs) were present at the phylum level. Of these, 43.3% …

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Comparison Of Causality Of Temperature And Precipitation On Italian Ryegrass (Lolium Multifloru Lam.) Yield Between Cultivation Fields Via Multi-Group Structural Equation Model Analysis In The Republic Of Korea, M. Kim, J. Y. Kim, M. H. Jo, C. H. Kim, K. Sung Jan 2022

Comparison Of Causality Of Temperature And Precipitation On Italian Ryegrass (Lolium Multifloru Lam.) Yield Between Cultivation Fields Via Multi-Group Structural Equation Model Analysis In The Republic Of Korea, M. Kim, J. Y. Kim, M. H. Jo, C. H. Kim, K. Sung

IGC Proceedings (1977-2023)

This study aimed to compare the causality of climatic factors affecting the yield of Italian ryegrass (IRG) between upland fields and paddy fields, by multi-group structure equation modeling. The raw data (n = 728) on forage contains both yield, field type, and the plantation address were collected from the Rural Development Administration, Republic of Korea. The climatic factors were: growing days, temperature and precipitation - in autumn and next spring seasons - from the climate big data of the weather information system of Korean Meteorology Administration. In the result, the composition of climatic factors was similar, but the causality by …

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Changes In Crude Protein And Fiber Contents Of Small Grain Cereals For Forage Over Time, J. L. Zaragoza-Ramirez, N. Zayago-Ramos, P. A. Martinez-Hernandez Jan 2022

Changes In Crude Protein And Fiber Contents Of Small Grain Cereals For Forage Over Time, J. L. Zaragoza-Ramirez, N. Zayago-Ramos, P. A. Martinez-Hernandez

IGC Proceedings (1977-2023)

Oat, triticale, wheat and barley are small grain cereals used as forage in many temperate Mexican regions. The objective was to determine crude protein and van Soest fiber contents of these forages cut at 80, 96, 108, 121, 138 and 153 days after seeding. Cultivars used were: Chihuahua (OC) for oat; Arne (TA), Bicentenario (TB) and Siglo XXI (TS) for triticale; Saturno (WS) for wheat; and San Marcos (BSM) for barley. Experiment was under greenhouse conditions from November 2015 to May 2016. Crude protein (CP), neutral (NDF) and acid (ADF) detergents fibers were determined on the forage harvested at each …

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Collection Priorities Of Pasture Genetic Resources In The Paniceae Native To South Africa, F. L. Müller, M. Trytsman, E. L. Masemola, M. I. Kgonothi, N. R. Mkhize, T. J. Tjelele Jan 2022

Collection Priorities Of Pasture Genetic Resources In The Paniceae Native To South Africa, F. L. Müller, M. Trytsman, E. L. Masemola, M. I. Kgonothi, N. R. Mkhize, T. J. Tjelele

IGC Proceedings (1977-2023)

There is an urgent need for the prioritization and ex situ conservation of pasture grass species. Many pasture grasses are still in the process of domestication and grasslands in the tropical, subtropical, semi-arid and arid regions of the world are therefore a major source of genetic material for future forage improvement. Within South Africa, it was found that the Paniceae contains several species with high pasture value and that many populations of these species are found in water-limited environments. Therefore, it was proposed that a strategy be developed for the South African National Forage Genebank to prioritize efforts to collect …

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Changes In Defoliation Patterns Of Plant Functional Groups Under Variable Herbage Allowance In Campos Grasslands, N. Caram, F. Casalás, Pablo Soca, M. Wallau, M. Cadenazzi, P. Boggiano Jan 2022

Changes In Defoliation Patterns Of Plant Functional Groups Under Variable Herbage Allowance In Campos Grasslands, N. Caram, F. Casalás, Pablo Soca, M. Wallau, M. Cadenazzi, P. Boggiano

IGC Proceedings (1977-2023)

Several studies have evaluated separately forage production, botanical composition, leaf traits and animal performance. However, few of them have focused on defoliation patterns at the level of functional groups (FGs) under different and variable herbage allowance (HA), especially in natural, diverse grasslands. The objective was to evaluate the relationship between HA and leaf traits on defoliation patterns of mature beef cows in the autumn, winter and spring. We evaluated the grazing probability (GP), intensity of defoliation (ID), and leaf traits on 14 species that represent more than 80% of total dry matter of the pasture. The experiment at which we …

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Can Livestock Alone Be The Main Source Of Income From Rangelands In Poor Countries?, Hossein Arzani, Mohammad Jafari, H. Moradii Jan 2022

Can Livestock Alone Be The Main Source Of Income From Rangelands In Poor Countries?, Hossein Arzani, Mohammad Jafari, H. Moradii

IGC Proceedings (1977-2023)

In many countries due to the high population of land holders, there is insufficient range area for each land holder to cover all life expenses. In such places, the income of only livestock in rangelands is not enough to cover living expenses of landholders. The ideas in this paper suggest that researchers should create and explore economic models that incorporate the multiple use concept in rangelands and show how multiple uses are compatible with livestock grazing and to sustain the livelihood of rangeland families.

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Assessment Of Climate Events In Changma Season (Korean Monsoon) For Production Trend Of Sorghum-Sudangrass Hybrid (Sorghum Bicolor L.) In The Central Inland Regions Of Korea Using Time Series Analysis, M. Kim, J. Y. Kim, M. H. Jo, K. Sung, H. Jo Jan 2022

Assessment Of Climate Events In Changma Season (Korean Monsoon) For Production Trend Of Sorghum-Sudangrass Hybrid (Sorghum Bicolor L.) In The Central Inland Regions Of Korea Using Time Series Analysis, M. Kim, J. Y. Kim, M. H. Jo, K. Sung, H. Jo

IGC Proceedings (1977-2023)

This study aimed to assess the impact of climate events in the Changma (Korean Monsoon) season on the production trend of sorghum-sudangrass hybrid (SSH) in central inland regions using time series analysis. The dataset in Suwon from 1988–2013 (n = 388) was generated by merging SSH data and climate data. The accumulated temperature (SHAT, ℃), rainfall amount (SHRA, mm) and sunshine duration (SHSD, hr) from seeding to harvesting were used to assess their impact on the trend of dry matter yield (DMY, kg/ha) for SSH. Furthermore, heavy rainfall (HRF) and typhoons (TPH) were considered as climate events. As a result, …

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Assessment Of Causality Between Climate Variables And Production For Whole Crop Maize Using Structural Equation Modeling, M. Kim, J. Y. Kim, M. H. Jo, H. Jo, K. Sung Jan 2022

Assessment Of Causality Between Climate Variables And Production For Whole Crop Maize Using Structural Equation Modeling, M. Kim, J. Y. Kim, M. H. Jo, H. Jo, K. Sung

IGC Proceedings (1977-2023)

This study aimed to assess the causality of different climate variables on the production of whole crop maize silage (Zea mays L.; WCM) in the central inland region of the Republic of Korea. Furthermore, the effect of these climate variables was also determined by looking at direct and indirect pathways during the stages before and after silking. The WCM metadata (n = 640) were collected from the Rural Development Administration’s reports of new variety adaptability from 1985‒2011 (27 years). The climate data was collected based on year and location from the Korean Meteorology Administration’s weather information system. Causality, in …

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Analysis Of Ensiling Suitability Of Moringa, A Woody Plant, Z. Du, F. Yang, Y. Lin, Y. Cai Jan 2022

Analysis Of Ensiling Suitability Of Moringa, A Woody Plant, Z. Du, F. Yang, Y. Lin, Y. Cai

IGC Proceedings (1977-2023)

To effectively use the woody plant resources as animal feed, the ensiling suitability of Moringa including the dynamics of microbial community, chemical composition, and silage fermentation were studied. Tender stems and leaves of Moringa at the full-bloom stage of second cutting was used for silage preparation in Guizhou, China. After 3, 7, 15, 30, and 60 days of ensiling, five silos for each treatment were opened to analyze the fermentation characteristics. Moringa before ensiling contained 104 lactic acid bacteria (LAB), 106 aerobic bacteria, 104 coliform bacteria, 102 yeast, and 104 mold based on colony-forming unit/g …

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Impact Of Grazing Management On Productivity Of Tropical Grasslands, Moacyr Corsi, Geraldo B. Martha Jr., Domício Do Nascimento Jr., Marco A. A. Balsalobre Jan 2022

Impact Of Grazing Management On Productivity Of Tropical Grasslands, Moacyr Corsi, Geraldo B. Martha Jr., Domício Do Nascimento Jr., Marco A. A. Balsalobre

IGC Proceedings (1977-2023)

Beef and dairy cattle enterprises from tropical pasture-based systems are notoriously of low productivity. The low soil fertility, the exploitation of native grasslands, the low genetic potential of the animals and the poor management of soil, pasture and animal components are all arguments used to explain these “low-productivity systems”. In fact, research has consistently indicated up to 50% increase in calving rate when animals grazing unfertilized pastures were supplemented with trace-mineralized salt (Table 1) but unfortunately less than 90% of Brazilian farmers use this management strategy (Tosi, 1997). However, a recent survey conducted by São Paulo State government showed that …

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Impact Of Grazing Management On The Productivity Of Cold Temperate Grasslands Of Southern Patagonia - A Critical Assessment, A. F. Cibils, M. B. Coughenour Jan 2022

Impact Of Grazing Management On The Productivity Of Cold Temperate Grasslands Of Southern Patagonia - A Critical Assessment, A. F. Cibils, M. B. Coughenour

IGC Proceedings (1977-2023)

The contention that productivity of cold temperate grasslands of southern Patagonia have been greatly affected by domestic herbivore grazing in the past is fairly widespread. The consequences of spatiotemporal interactions between grazing and abiotic factors on the overall productivity of such systems, however, are still poorly understood. Predictions of both short- and long-term impacts of grazing management strategies on grassland productivity require a better understanding of these interactions. In this paper we make a critical assessment of the impact of grazing management on long-term sustainability of the grass steppes of southern Patagonia (Argentina). We discuss this issue in the context …

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Productivity Of Winter And Spring Native Improved Vegetation Under Different Grazing Stocking Rates On Basaltic Soil, M. Bemhaja Jan 2022

Productivity Of Winter And Spring Native Improved Vegetation Under Different Grazing Stocking Rates On Basaltic Soil, M. Bemhaja

IGC Proceedings (1977-2023)

Improved grassland with Lotus corniculatus, Trifolium repens and annual phosphorus fertilization, was evaluated during winter and spring for five consecutive years under grazing at three different stocking rates on medium basaltic soil. Specific contribution of Lotus and Trifolium reached 67% of grassland community in the first year. Stipa setigera and Poa lanigera increased their contribution from 0.8 to 17% in the fourth year of grazing experiment. Highest average value of crude protein was 19% during the second year and was related to legumes contribution. Forage availability was always up to 1.5 ton MS/ha at the three stocking treatments. Average daily …

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Effects Of Cattle Grazing On A Perennial Legume, Bitumen Trefoil (Bituminaria Bituminosa (L.) Stirton), In A Mediterranean Grassland, M. Gutman, M. Sternberg, A. Perevoltsky Jan 2022

Effects Of Cattle Grazing On A Perennial Legume, Bitumen Trefoil (Bituminaria Bituminosa (L.) Stirton), In A Mediterranean Grassland, M. Gutman, M. Sternberg, A. Perevoltsky

IGC Proceedings (1977-2023)

A six-year study was conducted in a Mediterranean grassland in north-eastern Israel to investigate the effects of cattle grazing management on a perennial legume, Bitumen Trefoil (Bituminaria bituminosa (L.) Stirton). The relationship between grazing pressure and its relative plant cover was studied in the context of inter-annual variation in rainfall. Treatments included manipulations of stocking rates (moderate, heavy and very heavy) and of grazing regimes (continuous vs. seasonal), in a factorial design. The results showed that inter-seasonal rainfall variation was a dominant factor in the expression of plant cover changes of this species. Grazing showed no significant effect on …

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Increased Above-Ground Biomass And Plant Species Decline Related To The Presence Of Eragrostis Curvula Across Multiple Grazing Grasslands In The Snowy Monaro Region Of Australia, J. Brown, L. Ingram Jan 2022

Increased Above-Ground Biomass And Plant Species Decline Related To The Presence Of Eragrostis Curvula Across Multiple Grazing Grasslands In The Snowy Monaro Region Of Australia, J. Brown, L. Ingram

IGC Proceedings (1977-2023)

"It will be noticed that invasions most often come to cultivated land, or to land much modified by human practice." This quote was published in 1958 by Charles Elton, and holds true today, backed by empirical evidence suggesting mechanisms of disturbance, plant functional traits and propagule pressure can push a cultivated system towards an invaded state. 17 farms, with either a current or previous history of grazing and land modification, within the Snowy Monaro Region, NSW, Australia, were surveyed to explore the relationship between the non-native C4 perennial tussock grass Eragrostis curvula [Schrad.] Nees. and species richness. As E. curvula …

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The Use Of Open Communal Grazing Designs To Screen Options For Grazing Management, David R. Kemp, D. L. Michalk, P. M. Dowling, G. Millar Jan 2022

The Use Of Open Communal Grazing Designs To Screen Options For Grazing Management, David R. Kemp, D. L. Michalk, P. M. Dowling, G. Millar

IGC Proceedings (1977-2023)

An open communal grazing design is described that enables a large number of grazing tactics to be concurrently evaluated in small plots under common grazing conditions. Pasture data indicated that the same level of utilisation occurred inside the experimental plots as in the surrounding field. However, differential grazing may occur where plots have divergent composition. The open communal design was economical using < 5% of the land, livestock and fencing resources of alternative designs. The limitations of the open communal design as a research tool are also discussed.

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Stocking Rate And Supplementation Effects On Performance Of Lambs Grazing Triticale And Ryegrass Sward In Uruguay, R. San Julián, Fabio Montossi, L. Guarino, F. Pittaluga Jan 2022

Stocking Rate And Supplementation Effects On Performance Of Lambs Grazing Triticale And Ryegrass Sward In Uruguay, R. San Julián, Fabio Montossi, L. Guarino, F. Pittaluga

IGC Proceedings (1977-2023)

An experiment was carried out from 9 June to 2 October 1997, using a Lolium multiflorum Lom. (Ryegrass) and X Triticosecale Wittmack (triticale) sward to evaluate the effect of stocking rate (SR; 20, 30 and 40 lambs/ha), and supplementation (S; with or without) on Corriedale lamb performance. SR had a significant effect on: liveweight gain (160, 130 and 90 g/an/d, P< 0.01); greasy fleece weight (2.8, 2.7 and 2.3 kg, P< 0.01); fiber diameter (28, 27, and 26 microns, P< 0.05); rib eye depth (2.4, 2.1 and 2.0 cm, P< 0.05); fat cover (3.2, 2.1 and 1.5 cm, P< 0.01); hot carcass weight (17.7, 15.6 and 13.5 kg/an, P< 0.01); GR (10.5, 6.6 and 4.2 mm, P< 0.01) and boneless leg weight (1.56, 1.42 and 1.24 kg, P< 0.05), for 20, 30 and 40 lambs per ha, respectively. At the highest SR, lambs increased grazing time (59 vs 52%) and biting rate (29 vs 26 bites/lamb/min). The mayor influence of S on lamb performance was found in grazing behavior variables: (grazing time (63 vs 50%, P< 0.01); biting rate (26.8 vs 28.4 bites/lamb/min, P< 0.01)), carcass characteristics: (hot carcass weight (15.3 vs 16.0 kg, P< 0.05); GR (7.9 and 6.3 mm, P< 0.05)) for with and without supplement, respectively. Over the experimental period (115 days), liveweight production and wool production ranged from 358 to 437 kg/ha for 20 and 30 lambs/ha respectively, and wool production from 55 to 93 kg/ha for 20 and 40 lambs/ha respectively. These results show the potential use of mixed ryegrass and triticale swards to produce high quality lamb meat even at high SRs, and the convenience of using supplements only when sward conditions are not sufficient to maintain an adequate lamb performance, particularly when high lamb SRs are used.

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Effect Of Winter Grazing Management Of Stockpiled Native Pastures Of Basaltic Soils Of Uruguay On Daily Gains Of Heifers, G. Pigurina, R. Castells, G. Reyes, E. J. Berretta Jan 2022

Effect Of Winter Grazing Management Of Stockpiled Native Pastures Of Basaltic Soils Of Uruguay On Daily Gains Of Heifers, G. Pigurina, R. Castells, G. Reyes, E. J. Berretta

IGC Proceedings (1977-2023)

The effect of three grazing systems of fall stockpiled native pastures on the winter gains of 66 Hereford heifers (135 kg) was studied. Treatments were: continuos grazing (CG); (C7) the plot was divided in 12 and each was grazed for 7 days and (C28), the plot was divided in 3 and each were grazed for 28 days. Heifers were weighed every 14 days and grazing behaviour was recorded. Stockpiled HM was greater (P< 0.05) in C7 and C28 than in CG (988, 912, and 604 kg DM/ha, respectively). Herbage allowance (HA) was greater (P< 0.01) in CG followed by C28 and C7 (11.7, 6.6 and 5.9 kg DM/100 kg LW, respectively). Post-grazing HM was greater (P0.05) in all pastures (CP 10.2%, NDF 71.2%, ADF 41.3% and ash 14.4%). Final LW of heifers were similar (P> 0.05) (167, 162 and 160 kg for CG, C7 and C28, respectively). A very mild winter favoured exceptional gains which tended to be higher in CG (0.353 …

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Influence Of Stocking Rate And Grazing System On Lamb Performance Of Mixed Oat And Ryegrass Swards In Uruguay, Fabio Montossi, R. San Julián, C. Arocena, A. Dighiero Jan 2022

Influence Of Stocking Rate And Grazing System On Lamb Performance Of Mixed Oat And Ryegrass Swards In Uruguay, Fabio Montossi, R. San Julián, C. Arocena, A. Dighiero

IGC Proceedings (1977-2023)

An experiment was conducted at INIA-Tacuarembó Research Station (Uruguay) during 15 June to 4 October 1998, using a Avena Sativa (oat) and Lolium multiflorum (ryegrass) sward to examine the effect of stocking rate (SR; 25 and 35 lambs/ha) and grazing system (GS; strip and 7 days rotational grazing) on sward and lamb performance. SR had a significant effect on lamb performance, being higher the liveweight gain (LWG; 120 vs 98 g/a/d, P < 0.01), hot carcass weight (HCW; 17.7 vs 16.1 kg/a, P < 0.05) and carcass fat cover (GR; 12 vs 8 mm, P < 0.01) of those lambs managed at the lower SR. At the high SR, lambs increased grazing time (405 vs 376 min., P < 0.05). SG did not affect lamb performance, but strip GS reduces lamb grazing time (367 vs 414 min., P < 0.01) and biting rates (22 vs 24 bites/lamb/min., P < 0.01). Post grazing sward height (SH) was highly associated with LWG (LW = - 101,7 + 32.7 SH – 1.49 SH2, R2 = 0.66). This experiment demonstrated that: (a) the productive potential of ryegrass and oat swards to produce high quality …

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