Infograz: A Data Base For Tropical Grazing Systems,
2024
University of Queensland
Infograz: A Data Base For Tropical Grazing Systems, K G. Rickert, J Carter, C K. Mcdonald
IGC Proceedings (1977-2023)
INFOGRAZ is a prototype of a comprehensive relational database that describes the management of, and stores information from, grazing experiments in northern Australia associated with the wool, beef, and dairy industries. It provides permanent storage and public access for detailed measurements on climate, soil, plants, and animals, which are a valuable resource for future pasture scientists and computer modellers of grazing systems. Thus it will prevent the detailed observations being lost with the passage of time. Verified data from each experiment are stored in tables which can be distributed on CD-ROM, along with procedures to access the data and use …
Effects Of Two Grazing Conditions On The Reproductive Achievement Of Male Alpaca In The Northern Peru Grasslands,
2024
Massey University
Effects Of Two Grazing Conditions On The Reproductive Achievement Of Male Alpaca In The Northern Peru Grasslands, C Pinares, E Malpartida, S Cortez
IGC Proceedings (1977-2023)
Alpaca have recently been introduced to the northern Peru grasslands (Jalca). Effects of two systems of grazing management, co-grazing (with sheep) under fair grassland condition (CGFC) versus exclusive grazing under good grassland condition (EGGC), upon the reproductive achievement was examined from the 6th to the 16th month of age. Each system involved 20 Huacaya animals, managed by individual herders. Availability of herbage preferred by alpaca (HMA) and animal measurements (herbage intake, liveweight, testicle size, penis release from preputial attachments, plasma testosterone) were monitored monthly. Puberty, judged by the penis release from the preputial attachments, was achieved by 7 …
Experiences Of Eight Ohio Beef And Sheep Producers With Year Round Grazing,
2024
The Ohio State University Extension
Experiences Of Eight Ohio Beef And Sheep Producers With Year Round Grazing, H M. Bartholomew, S L. Boyles, B Carter, E Vollborn, D Miller, R M. Sulc
IGC Proceedings (1977-2023)
Livestock producers participated in a demonstration project to extend the grazing season and evaluate dormant forage quality and yield. Differences were not detected in yields among forage species but yield differences existed among sites. Yield estimates did not change over time across all forage species but some sites were only able to participate for two months. Producers utilizing fescue beyond November had reductions in herbage mass. Crude protein, available crude protein, acid detergent fiber, and neutral detergent fiber content differed among forage species and sites. Energy and lignin content were similar for all forage species and sites. Sodium and copper …
Forage Production Of Irrigated Lecerne- Grass Mixtures Grazed By Sheep,
2024
IDEVI-INTA
Forage Production Of Irrigated Lecerne- Grass Mixtures Grazed By Sheep, M L. Enrique, D P. Minon
IGC Proceedings (1977-2023)
The forage production and botanical changes of lucerne cultivars in pure stands and in grass mixtures were studied in a split-plot experiment with irrigation and sheep grazing. The non dormant lucerne cultivars (Medicago sativa) CUF 101, Monarca SPINTA, P 30 and common were the main plots, and tall fescue (Festuca arundinacea), canarygrass (Phalaris aquatica), cocksfoot (Dactylis glomerata), tall wheatgrass (Thynopirum ponticum) and prairie grass (Bromus catharticus) were the subplots. The experiment was grazed 3, 6 and 4 times during 3 years. Total yield was similar for all lucerne …
Oat Grazing: Forage Composition And Supplementation Response,
2024
Universidad Nacional del Centro de la Provincia de Buenos Aires
Oat Grazing: Forage Composition And Supplementation Response, A J. Freddi, M J. Arzadun, A A. Pissani, P Sastre
IGC Proceedings (1977-2023)
Oat forage (Avena sativa), which has low soluble carbohydrates (SC) and high soluble protein (SP) content, can reduce liveweight gain of grazing animals; supplementation with grain and low degradability protein may serve to counteract the effect. A grazing trial was carried out on two soils with different nitrogen (NO3 -) availability, from 16 April 1994 to 6 September 1994. Steers were randomly allocated to 3 treatments: low nitrogen (LN), high nitrogen (HN) and high nitrogen with supplementation (HNS). Forage of LN showed lower SP (p<0.05) during the first month of grazing, and higher SC (p<0.05), than HN during the first two months of the trial. Animal liveweight gain was: 892, 909 and 775 g/an/day for LN, HNS and HN, respectively, with animals in HN of significantly lower liveweight gain (p<0.05). Under the conditions of this trial, animals grazing on oat forage with lower SC and higher SP had lower liveweight gain and responded to supplementation.
Native And Introduced Forage Systems For Cow-Calf Production,
2024
USDA, Agricultural Research Service
Native And Introduced Forage Systems For Cow-Calf Production, S W. Coleman, W A. Phillips, J D. Volesky
IGC Proceedings (1977-2023)
The objectives of this study was to compare a highly productive introduced warm-season perennial grass to native range for cowcalf production over two years. Three systems, 1) native range with pelleted soybean or cottonseed meal as winter protein supplement (NC); 2) native range with wheat pasture (NW); and 3) Plains Bluestem with wheat pasture (PB) were compared. Protein supplements were given twice weekly and cows grazing wheat pasture were allowed 6 hrs to graze. Cows on NW were heavier with higher condition at breeding in the spring of 1994 than those on NC and cows on PB were heavier and …
Rotational Stocking And Soil Nutrient Distribution On Hawaiian Grasslands,
2024
University of Hawaii, Hilo
Rotational Stocking And Soil Nutrient Distribution On Hawaiian Grasslands, B W. Mathews, J P. Tritschler, L E. Sollenberger
IGC Proceedings (1977-2023)
A naturalized kikuyu (Pennisetum clandestinum Hochst. ex Chiov.) grassland was grazed by heifers (Bos taurus) for 2 years to determine the effects of two rotational stocking methods (short vs. long grazing periods) on soil N, P, K, Ca, Mg, and S distribution in paddocks with natural shade. Additionally, kikuyugrass-greenleaf desmodium (Desmodium intortum Urb.) paddocks were used to evaluate soil nutrient distribution in rotationally stocked paddocks (long grazing periods) without shade. In the study with shade, soil N, P, and K distribution did not differ between stocking methods. These nutrients accumulated within 15 m of shade, but did not …
Relationship Between Height And Sward Quality In Rotational Dairy Systems,
2024
Universidade de Santiago de Compostela
Relationship Between Height And Sward Quality In Rotational Dairy Systems, M R. Mosquera-Losada, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
Height is a good guide for management in dairy systems.Intake by dairy cows depends on amount offered and quality of pasture and for this reason a relationship between that offered and pasture quality with height should be studied. The experiment was conducted in NW of Spain with three different stocking rates in dairy systems. A lower quality sward was found in the taller offered pasture as indicated by its higher ADF and lower CP percentages. Total sward ADF (kg x ha-a) was higher in taller offered pasture, which indicated a lower pasture quality, however the total CP was positively related …
Non-Destructive Methods For The Estimation Of Sward Production,
2024
Universidad de Santiago de Compostela
Non-Destructive Methods For The Estimation Of Sward Production, M R. Mosquera-Losada, A Gonzalez-Rodriguez
IGC Proceedings (1977-2023)
Two non- destructive methods of grass production were compared: grassmeter and sward stick, in order to find an equation for transforming one into the other in dairy rotational systems. Linear, logarithmic and quadratic equations were fitted to the data. Linear equation was preferred by simplicity. General equations which included all the year periods showed no differences between sward stick and grassmeter. A detailed study of the different phenology states showed lower heights with grassmeter than with the sward stick method, which should take into account grazing management height recommendations.
Formation And Development Of The Center For Grassland Studies At The University Of Nebraska,
2024
University of Nebraska - Lincoln
Formation And Development Of The Center For Grassland Studies At The University Of Nebraska, M A. Massengale
IGC Proceedings (1977-2023)
The Center for Grassland Studies was formed at the University of Nebraska in 1994 to implement focused interdisciplinary research, educational, and service programs and activities that emphasize the role of grasslands as a natural resource and conservation measure and that enhance the efficiency, profitability, sustainability, and aesthetic value of grasslands, wetlands, and turf. Although the Center is still in a developmental stage, it appears to be accomplishing those objectives.
The Transformation Of Greek Grasslands Under The Impact Of Socio-Economic Factors,
2024
Agricultural Development Office of Granitsa
The Transformation Of Greek Grasslands Under The Impact Of Socio-Economic Factors, R Thanopoulos
IGC Proceedings (1977-2023)
The impact of socio-economic factors on the transformation of Greek grasslands is examined. Factors like urbanisation, migration, collapse of traditional way of life, social pressure for land distribution, intensification of agriculture shaped the evolution of grasslands. Thus, these factors should be taken into consideration for the planning of grasslands management.
Data Requirements For Whole-Farm Economic Analysis Of Grazing Alternatives,
2024
Kansas State University
Data Requirements For Whole-Farm Economic Analysis Of Grazing Alternatives, R O. Burton Jr
IGC Proceedings (1977-2023)
The purpose of this paper is to contribute to better communications among the agronomists, animal scientists, and agricultural economists on interdisciplinary teams, that wish to provide useful information to forage producers. This is accomplished by discussing major issues and data requirements for whole-farm economic analysis.
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All,
2024
Institute for Animal Husbandry, Belgrade, Yugoslavia
Native Grasslands Of Yugoslavia As A Potential For "Biologically High Quality Food" Production - To Be Preserved And Used For The Benefit Of All, Djordjevic-Milosevic Suzana, Negovanovic Dragan, Zakonovic Miodrag
IGC Proceedings (1977-2023)
Natural grasslands are the base of the livestock production in the hilly-mountainous regions of Yugoslavia. Poor economic power of the owners of these areas brought about a complete dying out of agricultural production in these regions in the last few years. In the same time, the lack of financial resources made it impossible for the farmers to use the fertilisers, protective and other chemical agents which result in a high degree of environmental preservation. Due to current economic policy at this time the population has moved out and there is no industrialisation. The revival of agriculture on the hilly-mountainous regions …
Some Economics Problems Of Range Resource Analysis In Free And Open Access Environment,
2024
Universite de Dschang
Some Economics Problems Of Range Resource Analysis In Free And Open Access Environment, E Tedonkeng Pamo
IGC Proceedings (1977-2023)
Economic analysis has been the traditional means by which the costs and benefits of rangeland conservation and sustained development have been identified. Conventional analysis has proved inadequate for dealing with the following realities : (1) open access in circumstances of poorly defined common-resource ownership tends to encourage over exploitation; (2) many costs of rangeland degradation involve externalities that will occur in the future; (3) the values of preservation and sustained management are substantial and can be translated into financial assistance; and (4) benefits from rangeland are not often appreciated because of lack of knowledge from rangeland. Recent approaches to economic …
Studies On The Distribution And Formation Of The Meadows In China,
2024
Hulenbeir Grassland Institute
Studies On The Distribution And Formation Of The Meadows In China, Feng Guojun, Zhang Xiujun, Zhu Libuo, Wei Shaocheng, Zhang Yongliang
IGC Proceedings (1977-2023)
The lowland meadows are distributed on the Northeast Plains in the temperate zone in China, and its area became less and less with an increase of longitude. There are some regularities for the distribution of montane meadows, sub-montane meadows and cold-alpinal meadows. And the distribution and formation for meadows are independent upon the zonal climate and their environmental soil moisture.
Sward Structure Under Continuous And Rotation Grazing,
2024
UZPI
Sward Structure Under Continuous And Rotation Grazing, V Pavlu, J Velich
IGC Proceedings (1977-2023)
Sward structure under continuous (CG) and rotational (RG) grazing system was studied at an experimental pasture in the Jizerské hory mountains. Herbage mass and vertical distribution was assessed by cutting ten quadrats (0.1 x 0.5 m) and separated into grass, white clover, dandelion, other forbs and dead material. The proportions of grasses was higher at RG (on average 51% of the pasture mass) than at CG (41%). In the years with normal amount and distribution of precipitation the proportion of white clover was higher at CG (17%) than at RG (9%). The lack of summer precipitation damaged more significantly the …
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil,
2024
EMBRAPA-CNPGC
Beef Cattle Production On Renovated Grass Pastures In Savannas Of Brazil, V.P B. Euclides, M.C M. Macedo, M P. Oliveira
IGC Proceedings (1977-2023)
A 3-year grazing trial was conducted, to study animal production on degraded grass pastures, renovated by two levels of fertilization. All paddocks were divided into halves: one received 1.5 t/ha of dolomitic limestone, 400 kg/ha of a fertilizer formula 0-16-18 and 50 kg/ha of microelements (FL1); and the other 3.0 t/ha , 800 kg/ha and 50 kg/ ha of the same fertilizers (FL2). Productivity on FL2 pastures was greater than that on FL1 pastures, averaging 565 and 395 kg of liveweight gain (LWG)/ha/year, respectively. For all grasses the productivity in both fertilizer treatments decreased linearly from the first to the …
Pasture Attributes And Live-Weight Gain Of Lambs Grazing With Different Supplementation Levels,
2024
Universidad Autonoma de Chapingo
Pasture Attributes And Live-Weight Gain Of Lambs Grazing With Different Supplementation Levels, P A. Martinez-Hernandez, M Meza-Nieto, J Perez-Perez, R Barcena, J G. Herrera
IGC Proceedings (1977-2023)
The purpose of this study was to determine pasture attributes, liveweight gain and stocking rate from a mixed pasture grazed by lambs recieving different supplementation levels. There were four treatments: in two, lambs grazed at 4 or 8% herbage allowance, no supplement; in the other two, lambs grazed at 4% herbage allowance plus a concentrate to cover 25 and 30 or 50 and 60% of estimated daily needs of metabolizable energy and crude protein. Pasture was of perennial and annual ryegrass, orchard grass and red clover. Pre and postgrazing forage mass, crude protein and dead material were not different (P …
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan,
2024
Hokkaido National Agricultural Experiment Station
Characteristics Of Grass Species In Pasture For High Producing Cows In Northern Japan, K Sudo, K Ochiai, T Ikeda
IGC Proceedings (1977-2023)
The prupose of this research was to investigate characteristics of grass species under different conditions appropriate to the intensive grazing system for high producing cows (8000 kg for a 305-day lactation) in northern Japan. Meadow fescue (Festuca elatior L.), timothy (Phleum pratense L.) and perennial ryegrass (Lolium perene L.) white clover (Trifolium repens L.) pastures were established and divided into two plots by difference of regulated plant height (meadow fescue and timothy) or of stocking intensity (perennial ryegrass). Each plot was 60m2 and was grazed when plant height reached 20cm or 30cm. Meadow fescue and perennial …
Live-Weight Gain Of Steers Grazing African Star Grass Four Herbage Allowances,
2024
Colegio de Postgraduados
Live-Weight Gain Of Steers Grazing African Star Grass Four Herbage Allowances, J Perez-Perez, J O. Hernandez-Velez, J G. Herrera-Haro, R Barcena-Gama
IGC Proceedings (1977-2023)
The objective was to determine weight changes of steers grazing African star grass (Cynodon plectostachyus) at four herbage allowances (2.0, 2.5, 3.0 and 3.5 kg of dry matter/100 kg of live weight day-1). A rotational grazing system with 10 grazing days and 30 days rest was followed. A Split Plot Design with four replications was used. Response variables were: daily gain per steer (DGS) and per hectare (DGH), dry matter forage yield (FY), % of utilization (% U) and in vitro dry matter digestibility (DMIVD). DGS and DGH were not different (P >0.05) among allowances and grazing periods. …
