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Articles 1051 - 1080 of 14327
Full-Text Articles in Entire DC Network
Crop Processing And Fractionation As A Commercial Proposition To Forage-Based Animal Systems, H T. Ostrowski-Meissner
Crop Processing And Fractionation As A Commercial Proposition To Forage-Based Animal Systems, H T. Ostrowski-Meissner
IGC Proceedings (1977-2023)
The paper outlines crop processing and fractionation technology as it applies to an intensive forage-based operation with beef cattle, The benefits of forage processing prior to its feeding to cattle are described with an emphasis not only on the uniformity of the nutritive quality of the processed product but also on the extra financial benefits resulting from the wet fractionation process. The value-added primary products from the fractionation process ensure extra return to the. forage producers, crop processing installation and the feedlot operation. The characteristics of the fractionation products derived from lucerne and other crops are described.
Integrated Grazing Of Goats With Sheep Or Cattle On Continuously Grazed Pasture, A M. Nicol, A.J F. Russel, I A. Wright
Integrated Grazing Of Goats With Sheep Or Cattle On Continuously Grazed Pasture, A M. Nicol, A.J F. Russel, I A. Wright
IGC Proceedings (1977-2023)
Oroups of ewes (10) and their twin lambs were grazed on sown ryegrass• white clover (Lolium perenne L.-Trifollum repens L.) pastures maintained at a sward surface height of 4 or 8 cm and a further group grazed with yearling goats (in a proportion of 1/3 ewe plus lamb live weight) also at fi cm. A second concurrent experiment consisted of 3 similar treatments using young cattle with sward surface heights of 8 and 12 cm. Results over the 140-day grazing period showed that allhough the diet selected by sheep and cattle grazed with goats contained more green grass …
Herbage And Animal Production From Tall Fescue- And Ryegrass-Based Pastures In A Summer-Dry Environment, D E. Hume, R.J M. Hay, T B. Lyons
Herbage And Animal Production From Tall Fescue- And Ryegrass-Based Pastures In A Summer-Dry Environment, D E. Hume, R.J M. Hay, T B. Lyons
IGC Proceedings (1977-2023)
Herbage production and animal performance were measured over 3 years In Hawkes Bay, a summer-dry region of New Z'.ealand. Tall rescue (Festuca arundinacea) (3 cultivars, all endophyte free) was compared with high endophyte perennial ryegrass (Lolium perenne). All pastures were sown with white clover (Trifolium repens). Herbage production and composition were determined for all seasons while cattle were monitored for live-weight gains from spring through to autumn. Tall fescue pastures produced 27% more total dry matter/ year than the ryegrass pasture, primarily in autumn. In summerautumn, ryegrass pastures had up to 76% dead matter …
Climate Change: Adapting Tropical And Subtropical Grasslands, G M. Mckeon, S M. Howden, N.O J. Abel, J M. King
Climate Change: Adapting Tropical And Subtropical Grasslands, G M. Mckeon, S M. Howden, N.O J. Abel, J M. King
IGC Proceedings (1977-2023)
Climate change as a result of increasing greenhouse gas concentrations or lhe repetition of historical climale variability will affect the management and production of tropical and subtropical grasslands that support about half the world's domestic herbivores. Previous studies of the regional impact of climate change and climate variability on intensive agriculture have shown lhat such evaluation should include the known and expected abilities of managers and governments to respond by reducing the negative impacts and taking advantage of positive opportunities, A high priority for grassland scientists is the development of similar evaluation capabilities for grassland systems, which are more complex …
Methane Production By New Zealand Ruminants, K Betteridge, M J. Ulyatt, J Knapp, R L. Baldwin
Methane Production By New Zealand Ruminants, K Betteridge, M J. Ulyatt, J Knapp, R L. Baldwin
IGC Proceedings (1977-2023)
Methane production by ruminants in New Zealand was estimated using a ma1hema1ical model of rumen digestion interfaced with census livestock numbers. New Zealand was divided into 4 climatic regions with each classified into improved, unimproved and tussock grasslands, and livestock were allocated to each class at appropriate stocking rates. Models of changing livestock numbers within n year were developed for each animal and land class. Food dry matter intake for each class of livestock was calculated from estimates of feed requirements and diet quality. Total methane production was estimated to be 1.50 Tg per year: 58.4% sheep, 20.7%, beef cattle, …
Nitrous Oxide Emissions From Grassland In Manawatu, New Zealand, R A. Carran, J P. Evans
Nitrous Oxide Emissions From Grassland In Manawatu, New Zealand, R A. Carran, J P. Evans
IGC Proceedings (1977-2023)
Nitrous oxide (Np) is a minor component of the atmosphere which acts as a potent greenhouse gas and also causes ozone depletion. Soil bacteria are the most important agents of N2O production, but both the New Zealand and the international data on N2O emission rates from soils are very poor at present. In order to help define the possible range of emission ranges from pasture soils· we selected sites with characteristics that would make then "high" or "low" emitters of N2O. The "high" emission site was a fine-textured, fertile but poorly drained flood plain soil. The "low" emission site was …
Development Of Plants Resistant To Insect Pests Using Gene Manipulation, D.W R. White, D R. Biggs, M T. Mcmanus, C R. Voisey, J T. Christeller, A H. Broadwell, E.P J. Burgess, C N. Chilcott, P J. Wigley, P G. Mcgregor
Development Of Plants Resistant To Insect Pests Using Gene Manipulation, D.W R. White, D R. Biggs, M T. Mcmanus, C R. Voisey, J T. Christeller, A H. Broadwell, E.P J. Burgess, C N. Chilcott, P J. Wigley, P G. Mcgregor
IGC Proceedings (1977-2023)
Damage to pasture plants caused by insect pests reduces the supply of feed for grassland animal production. In addition, the use of chemical insecticides for the control of pasture pests is undesirable for reasons of high cost and possible damage to the environment. One way to overcome these limitations is 10 utilize a recent development. in plant molecular biology which has seen the incorporation of cloned genes that confer insect _pest resistance into crop plants. To date, the most widely used genes for this purpose are those coding for insecticidal proteins from the bacterium Bacillus thuringiensis, and for inhibitors …
Implications Of A Doubling In Ambient Carbon Dioxide Levels Of Herbage Quality In Perennial Ryegrass And White Clover, H Clark, C C. Bell, P.C D. Newton, B D. Campbell
Implications Of A Doubling In Ambient Carbon Dioxide Levels Of Herbage Quality In Perennial Ryegrass And White Clover, H Clark, C C. Bell, P.C D. Newton, B D. Campbell
IGC Proceedings (1977-2023)
Digestibility (DMD) and crude protein (CP) percentage in leaf and stem of 4 cultivars each of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens) grown at 3 day/night temperatures (12f7, 18/ 13, 28/23°C) and 2 CO2 concentrations (35 0 or 700 ppm) was estimated using near infrared reflectance spectroscopy (N[RS). Differences between cultivars in DMD and CP were small and non-significant. Higher temperatures reduced DMD andCP in both species. DMD was unaffected by CO2 concentration in either species. The higher concentration of CO2 reduced leaf and stem CP by 14.6 and 10% respectively in white clover …
Volatile Constituents Of Tall Fescue Varieties In Relation To Palatability, Aldo Tava, Nicola Berardo, Miriam Odoardi
Volatile Constituents Of Tall Fescue Varieties In Relation To Palatability, Aldo Tava, Nicola Berardo, Miriam Odoardi
IGC Proceedings (1977-2023)
The chemical composition of the essential oil of tall fescue (Festuca arundinacea Schreb,), a poorly palatable species, was analysed by GC and GC-MS. The major components identified were alcohols, aldehydes and esters. The qualitative and quantitative differences detected among 6 cultivars of different geographical origin suggest the most abundant compounds may play a role in the grazing preference exhibited by animals.
Partitioning Of Major Elements Concentrations In Grasses Into Four Cell Fractions Based On Enzymatic Solubility, Suguru Saiga, Takanori Akiyama, Moegi Saski, Kiyoshi Watanabe
Partitioning Of Major Elements Concentrations In Grasses Into Four Cell Fractions Based On Enzymatic Solubility, Suguru Saiga, Takanori Akiyama, Moegi Saski, Kiyoshi Watanabe
IGC Proceedings (1977-2023)
To investigate availability of major elements to animals, N, P, K, Ca and Mg of plant dry matter were partitioned into 4 cell fractions based on enzyme solubility. When the elemental concentration of forage was compared, Dactylis glomerata was higher in K (1.69%), Festuca aru11dinacea in N (2.35%), K (1.68%) and Mg (Q.341 %) and Lolimum perenne in N (2.54%), P (0.224%) and Ca (0.457%). When compared between plant parts, concentrations of all elements.were higher in leaf than in stem, especially P, Ca and Mg. As a result of partitioning, more than 85% of P, K and Mg resided …
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
Improvement Of The Feeding Value Of Senescent Grass Pastures By Molecular Genetic Manipulation, G D. Bonnett, K R. Stevenson, R J. Simpson
IGC Proceedings (1977-2023)
Senescent grass pasture has low feeding value end is the major limitation to animal productivity during summer in annual environments. The loss of fructan from the stems of temperate grasses as they senesce contributes significantly to the decline in feeding value of the grass, Temporary retention of fructan during senescence achieved by treating grass with a herbicide increases both the feeding value of the grass and the productivity of animals grazing the modified pasture. We have identified an enzyme responsible for initiating the loss of fructan from stems of Lolium rigidum. It has been purified, characterized and will be used …
Modeling The Effects Of Climate Variability And Climate Change On A Pastoral Farming System, R J. Martin, D B. Baird, M J. Salinger, P R. Van Gardingen, D G. Mccall
Modeling The Effects Of Climate Variability And Climate Change On A Pastoral Farming System, R J. Martin, D B. Baird, M J. Salinger, P R. Van Gardingen, D G. Mccall
IGC Proceedings (1977-2023)
A simulation model was used to investigate the pasture and animal production and gross margins of a typical all sheep permanent pasture farm in South Canterbury, New Zealand, using 60 years of current climate data, and also a climate change scenario. The model was run on a fixed management system at different stocking rates with and without destocking during feed shortages. Mean annual pasture production was 8060 kg/ha, with a coefficient of variation of 22%. Destocking enabled more stock to be carried on average, with higher, but rh.ore variable, returns. A climate change scenario of a 75% increase in CO2' …
Effects Of Defoliation Height And Time Of Initital Defoliation On Regrowth Components In A Poa Pratensis- Dominated Sward, B E. Frankow-Lindberg
Effects Of Defoliation Height And Time Of Initital Defoliation On Regrowth Components In A Poa Pratensis- Dominated Sward, B E. Frankow-Lindberg
IGC Proceedings (1977-2023)
Two experiments on swards dominated by Poa pratensis L. were conducted in 2 climatically contrasting (wann/dry and cold/wet) years. There were either 4 or 3 initial defoliation dates in spring and 3 defoliation heights (2, 6 and 10 cm). Regrowths were harvested 4 weeks after the initial defoliation. The swards received a total of 80 kg/ha nitrogen split into 2 dressings. Regrowth characteristics, based on samples cut to ground level, depended on weather conditions. The yield of vegetative shoots was affected most by shoot size, which in turn was determined by initial defoliation date, in the dry year. In the …
Effect Of Management On Leaf Growth And Senescence Of Three Contrasting Grass Species, B M. Butler, J Hodgson
Effect Of Management On Leaf Growth And Senescence Of Three Contrasting Grass Species, B M. Butler, J Hodgson
IGC Proceedings (1977-2023)
The innuence of continuous grazing management on leaf extension, leaf senescence and tiller density of 3 grass species with contrasting tillering rates, tiller size and growth habit was examined. Perennial ryegrass (Lolium perenne L. cv. Grasslands Nui), tall fescue (Festuca arundinacea Schreb, cv. Grasslands Roa) and Yorkshire fog (Holc,,s la11allls L. cv. Massey Bnsyn) were maintained in as near a steady state as possible at sward heights of 3-10 cm. The balance between leaf extension and senescence, and tiller density resulted in net extension per unit area being generally greatest at sward heights of- 5.5 cm in Yorkshire fog and …
Applications Of Random Amplified Polymorphic Dna (Rapd) Markers In Plant Biology, Gail M. Timmerman, John A. Mccalum
Applications Of Random Amplified Polymorphic Dna (Rapd) Markers In Plant Biology, Gail M. Timmerman, John A. Mccalum
IGC Proceedings (1977-2023)
RAPDs are a new class of molecular marker based on PCR amplification of genomic DNA using random sequence primers. Their value for studying plant genomes has been clearly demonstrated in the short lime they have been in use. Uses of RAPD markers include genome mapping, lagging of genes, studying genetic diversity, identifying cultivars and analysing parentage. RAPDs should prove to be as applicable to the study of animal genomes ns they have for plant genomes, It is important that researchers using or planning to use this type of molecular marker be aware of two possible drawbacks of RAPDs. Since RAPDs …
A Traditional Exporter's Perspective Of Trade Reforms, N R. Mitchell
A Traditional Exporter's Perspective Of Trade Reforms, N R. Mitchell
IGC Proceedings (1977-2023)
The agriculture and trade policies which governments commonly have pursued over the last three decades, particularly governments in the large developed countries, have had a major impact on world patterns of production and trade in livestock and livestock products. This has been especially so for milk and dairy products where government involvement in markets has been most pervasive. One effect has been that the comparative advantages derived from the production of livestock products based on pasture feeding of animals \lave been suppressed or overridden. Reform of the international trading system for agricultural products now being developed in the GATT, and …
Impact Of Changing Trade Opportunities On Livestock Production In Developing Countries, J K. Camoens
Impact Of Changing Trade Opportunities On Livestock Production In Developing Countries, J K. Camoens
IGC Proceedings (1977-2023)
For the lesser developed countries (LDCs) and advanced countries (ACs), the paper identifies the determinants of "free" trade, analyses protectionism, examines the global trade picture with respect lo "free" trade, relates trade to production and the structure of demand, and finally predicts the impact of trade reforms. The analysis concludes that: (i) trade policies per se do not impact in any significant manner on domestic production or imports in the LDCs since world trade constitutes a small fraction of production; (ii) demand, and hence supply, of animal products are determined primarily by GNP, income distribution and price; (iii) grassland farming …
Development Of Grain-Saving, High Efficiency Pasture Animal Industry, Han Gui Qing
Development Of Grain-Saving, High Efficiency Pasture Animal Industry, Han Gui Qing
IGC Proceedings (1977-2023)
Grain-saving, high efficiency pasture-sustained (GSHEPS) animal industry, with its final purpose of profitable industry, is forage-orientated. This is a new fonn of operation based on advanced feeding management.
Cytotoxic Potential Of Fungi In The Genus Ganoderma, Abril Chao, Omobolanle A. Ayangade, Braham Dhillon, Navi Gill
Cytotoxic Potential Of Fungi In The Genus Ganoderma, Abril Chao, Omobolanle A. Ayangade, Braham Dhillon, Navi Gill
Mako: NSU Undergraduate Student Journal
Ganoderma lucidum is a mushroom forming fungus that has been used in traditional Chinese medicine for over 2,000 years. G. lucidum, also known as lingzhi or reishi, is consumed in several Asian cultures to promote health and longevity. Bioactive molecules with anticancer properties have been isolated and characterized primarily from the species Ganoderma lucidum, and the cytotoxic potential of other species in the genus Ganoderma remains relatively unclear. Bioactive molecules isolated from mushroom fruiting bodies are demonstrated to have cytotoxicity against different cancer cell lines. Triterpenes and polysaccharides are the two major groups of compounds that exhibit antitumor and anti-inflammatory …
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality, L Juan Carlos Dumont, A Francisco Lanuza
Effects Of Applied Nitrogen And Rest Period On Forage Production And Silage Quality, L Juan Carlos Dumont, A Francisco Lanuza
IGC Proceedings (1977-2023)
An experiment to analyse the effect of nitrogen (N) fertiliser and rest period initiation for silage making on permanent pasture was carried out. N fertiliser increased forage production, crude protein, neutral detergent fibre and ammonia-N. Shortening the intervals, by delaying the initiation of resting period, increased forage quality with only marginal decreases in dry matter (DM) production. Resting periods from the second week of September and cutting at the end of October or first week of November was appropriate in the Osorno area of Chile. The use of 60 kg N/ha is recommended. Two-cutting system must be considered in order …
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification, W Kuhbauch, J Schellberg
Change In Botanical Composition, Dry Matter Yield And Forage Quality Of Grassland After Five Seasons Of Extensification, W Kuhbauch, J Schellberg
IGC Proceedings (1977-2023)
Extensification of grassland management in Germany has 2 major objectives (I) to reduce the surplus of crop and animal products, and (2) to diminish unwanted side effects against the environment from intensive production systems. Some of the programmes on offer require a reduced number of cuttings and grazings per season, including a very late first cut of the sward and a reduction of nitrogen fertiliser. In a 5-yenr experiment at the grassland research station Rengen, Eifel-mountain-range, Germany, extensification of this type on productive grassland sites created an unbalanced botanical composition and, with nitrogen applied, a major portion of quackgrass in …
Efficiency Of Different Implements For Pasture Interseeding, J A. Josifovich
Efficiency Of Different Implements For Pasture Interseeding, J A. Josifovich
IGC Proceedings (1977-2023)
Pasture renovation with grasses and legumes appears to be a good practice to increase primary and secondary production. Trials were planted in 6 locations in Buenos Aires province, Argentina, 2 in Pergamino and 4 200 and 300 km south east of Pergamino, to evaluate 3 different implement combinations: a) rigid chisel coulter, b) spring tooth heavy duty coulter, with teeth 30 cm apart followed by spring tooth cultivators, and c) spring tooth heavy duty coulter 30 cm used twice in the same direction. The species sown were: fescue (Festuca arundinacea Schreb.), brome (Bromus uniolides H.B.K.), chicory (Cichoriu, intybus …
Role Of Mixed Animal Type Grazing In Range Preservation And Increasing Animal Product Output, T Nolan, J Connolly, C Sall
Role Of Mixed Animal Type Grazing In Range Preservation And Increasing Animal Product Output, T Nolan, J Connolly, C Sall
IGC Proceedings (1977-2023)
fhe work was part of a research programme to a) evaluate the role of mixed animal type grazing in increasing production, b) explain any; benefits obtained and c) develop improved whole grazing ecosystems in temperate and semi-arid areas. Its specific ai was to improve domestic food production from range grazing livestock and to preserve or improve native range resources. This paper discusses some recent results from the Senegalese Sahel related to· animal preferential and differential selection, animal performance and the role of mixed grazing in improving the relationships between them to secure the objectives stated. The use of these results …
Effect Of Grass-White Clover Mixtures On Steer Performance And Sward Characteristics In Atlantic Canada, H T. Kunelius, P Narasimhalu
Effect Of Grass-White Clover Mixtures On Steer Performance And Sward Characteristics In Atlantic Canada, H T. Kunelius, P Narasimhalu
IGC Proceedings (1977-2023)
Pasture production in winter cold regions such as Atlantic Canada is limited by the availability of winter hardy and productive grass and legume species, Perennial ryegrass (Lolium perenne L.), meadow fescue (Festuca prarensis Huds.) and timothy (Phleum pratense L.) grown in binary mixtures with white clover (Trifolium repens L.), and naturalised pasture consisting of Poa spp., Agrostis spp. and white clover, were compared under grazing, Steers were used to graze the swards from 16-26 cm down to 8 or 11 cm post-grazing surface heights, Dry matter intake was higher for natural pasture than for sown pastures, …
Range Management: Optimizing Forage Production And Qualityy, J E. Danckwerts, N M. Tainton
Range Management: Optimizing Forage Production And Qualityy, J E. Danckwerts, N M. Tainton
IGC Proceedings (1977-2023)
Range management involves optimising forage production and quality, both in the short term and in the long term. In the short term, temporal climatic variability, stocking rate, grazing system, fire, animal type. and spatial variability, inter alia, strongly, influence forage production and quality. On the other hand, long-term optimisation requires prevention of range deterioration. The nature of this process seems to be profoundly different between humid and arid rangelands, at least in tropical and subtropical zones. In the former, changes are relatively predictable, overgrazing resulting in gradual deterioration. In the latter, change is event driven, providing the grazier with …
Livestock Production Systems In The Cameroon Sahelo-Sudanian Region, E Tedonkeng Pamo, R D. Pieper
Livestock Production Systems In The Cameroon Sahelo-Sudanian Region, E Tedonkeng Pamo, R D. Pieper
IGC Proceedings (1977-2023)
The Sahelo-Sudanian region of Cameroon extends from 7° to 13° N. The region receives 400-1000 mm rainfall and is covered by a complex mosaic of. vegelation and plant communities. Animal production has always been a cornerstone of the economy of this region. The range use system of the region is extensive. The major problem faced by pastoralists has been a compression of their range not only by the northward-moving cultivation, but also by the southward moving desertification. Various grazing melhods have been suggested but none have yet been implemented, and nomadism and transhumance remain the major production systems. Analysis of …
Reduction Of Nutrient Losses For Dairy Farms, With Emphasis On Nitrogen, W Luten, D J. Den Boer
Reduction Of Nutrient Losses For Dairy Farms, With Emphasis On Nitrogen, W Luten, D J. Den Boer
IGC Proceedings (1977-2023)
Recently the Dutch government presented several policy papers in which standards are given for maximum allowed emissions to air, groundwater and surface water. Depending on the farm situation an optimum combination of measures in relation to housing, slurry storage, slurry and fertiliser application, and composition of the ration can be taken. In general a better use of nutrients from animal manure by applying slurry with low emission techniques in the growing season and a reduction of the stocking rate by a higher milk production per cow are the most effective and cheapest measures to reach these targets. There is a …
A Preliminary Discussion Of The Management And Administration Of Yunwu Mountain Natural Grassland Reserve In China, Zhao Zhiyi, Yang Ailian
A Preliminary Discussion Of The Management And Administration Of Yunwu Mountain Natural Grassland Reserve In China, Zhao Zhiyi, Yang Ailian
IGC Proceedings (1977-2023)
The advantages and problems encountered in the establishment of a grassland reserve are described. The conflicts between local farmers' requirement to feed and water livestock and the conservation strategy of natural grassland are discussed.
Buzzworthy Messaging: Assessing Residents’ Perceptions Of Labels To Better Promote Pollinator Gardening, Colby J. Silvert, Laura A. Warner, Cody Gusto, John M. Diaz, Rachel E. Mallinger
Buzzworthy Messaging: Assessing Residents’ Perceptions Of Labels To Better Promote Pollinator Gardening, Colby J. Silvert, Laura A. Warner, Cody Gusto, John M. Diaz, Rachel E. Mallinger
Journal of Extension
Consumers appear more likely to purchase plants with labeling indicating pollinator-friendly production or high pollinator resource value. No standardized label for pollinator-supporting plants or landscape practices exists in the United States, which has proliferated the variety of labels used by the industry. This mixed-methods study aims to provide insight into residents’ preferred pollinator-related labelling for plants and landscape practices in order to help Extension professionals and green industry stakeholders improve outreach, marketing, and communications efforts. Findings suggest a butterfly-friendly label would be most effective for marketing while residents would accept and favorably perceive labels emphasizing either pollinator-friendly or bee-friendly attributes.
Effects Of Revegetation Approaches On Wetland Plant Community Reassembly Under Hydrologic Extremes, Maddie Houde, Karin Kettenring
Effects Of Revegetation Approaches On Wetland Plant Community Reassembly Under Hydrologic Extremes, Maddie Houde, Karin Kettenring
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Active revegetation is often necessary to recover native plant communities in disturbed or degraded wetlands. However, active revegetation has been pursued less in wetlands than other ecosystems and thus, there are few established best practices to guide implementation. Additionally, wetland revegetation is challenging due to dynamic hydrology becoming more extreme and high invasive plant propagule pressure that can limit native plant recruitment and favor invasive plant dominance. In this study, we tested the efficacy of varied revegetation approaches on native plant reassembly and invasion resistance in semi-arid wetlands subject to seasonal hydrologic fluctuations. In a Great Salt Lake wetland in …