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Articles 121 - 150 of 155
Full-Text Articles in Weed Science
Duration Of Regrowth Of Ryegrass (Lolium Perenne) Swards: Effects On Rumen Fermentation Of Lactating Dairy Cows, P. Chilibroste, S. Tamminga, H. Boer
Duration Of Regrowth Of Ryegrass (Lolium Perenne) Swards: Effects On Rumen Fermentation Of Lactating Dairy Cows, P. Chilibroste, S. Tamminga, H. Boer
IGC Proceedings (1977-2023)
The relative importance of duration of sward regrowth and rumen fill and fermentation on the control of grazing time and intake rate during the first grazing session of the day were studied. Four lactating dairy cows were allowed to graze ryegrass (Lolium perenne) swards, with five different regrowth periods after mowing (6, 9, 16, 22 and 30 d). The cows were allowed to graze until they stopped voluntarily. Samples of rumen liquid were taken at approximately 0, 30, 60, 120 and 240 min after the grazing session was finished. Concentration of volatile fatty acids (VFA) followed a significant …
Gastrointestinal Nematode Infections In Grazing Domestic Ruminants, M. Eysker
Gastrointestinal Nematode Infections In Grazing Domestic Ruminants, M. Eysker
IGC Proceedings (1977-2023)
World wide gastrointestinal nematode infections impair production of ruminants. Particularly in small ruminants control of these infections is seriously hampered by the development of resistance of the parasites against anthelmintic drugs. This implies that alternative control measures have to be implemented in order to maintain a sustainable ruminant industry. In this paper the various possibilities to achieve this are briefly discussed. The possibilities discussed include grazing management, vaccination, selective breeding, biological control, nutrition and the use of bioactive forages such as for instance plants containing condensed tannins. At the end it is concluded that combinations of these options should preferably …
Tree Competition Reduces Cattle Growth Rates In Eucalypt Woodlands Of Queensland, T. J. Hall, J. R. Douglas
Tree Competition Reduces Cattle Growth Rates In Eucalypt Woodlands Of Queensland, T. J. Hall, J. R. Douglas
IGC Proceedings (1977-2023)
The wiregrass/bluegrass (Aristida/Bothriochloa) native pasture community in Eucalypt woodlands is a major cattle producing resource in Queensland. The effects of poplar box tree (Eucalyptus populnea) competition (at 5 m2/ha tree basal area) and grazing pressure on pastures and on growth of Brahman-cross steers were measured in a grazing experiment. Treatments were 2 tree competition levels (live trees or clearing) by 3 grazing pressures (low - 25%, medium - 50% and high - 75% utilisation of annual pasture growth). Pasture yield and pasture foliage cover increased for 3 years from the reduction in tree competition …
Bloat In Ruminants: The Cell Rupture Hypothesis, B. P. Berg, T. A. Mcallister, K.-J. Cheng
Bloat In Ruminants: The Cell Rupture Hypothesis, B. P. Berg, T. A. Mcallister, K.-J. Cheng
IGC Proceedings (1977-2023)
An alfalfa (Medicago sativa L.) cultivar with a low initial rate of digestion (LIRD), AC Grazeland B, was developed to test the hypothesis that the rate of cell rupture was a cause of frothy bloat in cattle or sheep. The amount of cell wall increases and digestibility declines as plants mature. Thus the cell rupture theory also predicts that the bloat potential of alfalfa is related to maturity. This study compared the digestibility of cell walls (NDF) in LIRD cultivars with that of a standard, Beaver, in relation to maturity and bloat incidence. Fresh alfalfa was fed to wethers …
A Comparative Grazing Study Of Sheep And Cattle Diet Selection On Native Pastures In Uruguay, Fabio Montossi, G. Pigurina, E. J. Berretta, I. Santamarina
A Comparative Grazing Study Of Sheep And Cattle Diet Selection On Native Pastures In Uruguay, Fabio Montossi, G. Pigurina, E. J. Berretta, I. Santamarina
IGC Proceedings (1977-2023)
An experiment was carried out during winter, spring and summer 1997, on native pastures of the basaltic region of Uruguay to evaluate the effects of different herbage mass levels (high, medium and low) on sward characteristics and on sheep and cattle diet selection and grazing behaviour. Higher herbage masses resulted in increments in herbage accumulation and sheep bite weight: winter (1880, 1513 and 610 kg DM ha-1, P < 0.01; 199, 148 and 128 mg DM/bite, P < 0.01), and summer (3046, 2175 and 1172 kg DM ha-1, P < 0.01; 214, 175 and 143 mg DM/bite, P < 0.01) for high, medium and low herbage mass levels respectively. The nutritive value of diet selected by sheep and cattle was higher than that of the herbage on offer, and higher in sheep than in cattle: winter (10.2, 15.9 and 12.5% crude protein, CP, P < 0.05; 49.2, 32.4 and 38.1% acid detergent fiber, ADF, P < 0.01, and summer (7.4, 10 and 9.5% CP, P < 0.05; 51.1, 36.8 and 43% ADF, P < 0.01) for herbage on offer, sheep and cattle diets respectively. These contrasting results found in the nutritive value were closely associated with differences in the proportions of the botanical components recorded, particularly the differential contribution of dead material. This experiment quantified the importance of diet selection in determining the nutritive value of the forage eaten by sheep and cattle on the native pastures of the basaltic region of Uruguay and established some relationships between diet selection and grazing management, involving animal selectivity ability differences (sheep versus cattle) and seasonal effects.
A Sheep And Catlle Diet Selection Study On A Fertilized Native Sward In Uruguay, Fabio Montossi, E. J. Berretta, G. Pigurina, I. Santamarina
A Sheep And Catlle Diet Selection Study On A Fertilized Native Sward In Uruguay, Fabio Montossi, E. J. Berretta, G. Pigurina, I. Santamarina
IGC Proceedings (1977-2023)
This study was undertaken during winter, spring and summer 1997, located in the basaltic region of Uruguay to evaluate the effects of stocking rate (SR) and N and P fertilizer application on sward characteristics and on sheep and cattle diet selection and grazing behaviour. The treatments applied were: a) control (C; without fertilizer application using a SR of 0.9 stock units (SU)/ha), b) T1 (with N and P fertilizer application using a SR of 0.9 SU/ha), c) T2 (with N and P fertilizer application using a SR of 1.2 SU/ha) and d) T3 (with N and P fertilizer application using …
Influence Of Sward Height, Concentrate Supplementation And Season On Grazing Activity Of Beef Cows, O. J. Gekara, E. C. Prigge, W. B. Bryan, M. Schettini, E. L. Nestor
Influence Of Sward Height, Concentrate Supplementation And Season On Grazing Activity Of Beef Cows, O. J. Gekara, E. C. Prigge, W. B. Bryan, M. Schettini, E. L. Nestor
IGC Proceedings (1977-2023)
The influence of sward height, concentrate supplementation and season on daily pattern of forage consumption of lactating beef cows grazing cool season pastures was determined. Cows (n=24; BW=535±10.8 kg) were randomly assigned to eight plots maintained at sward heights (SH) of either 4-8 cm or 8-12 cm and fed three levels of concentrate supplement: none = 0 kg/day, low = 3.12 kg/day or high = 6.24 kg/day. Cows on lower SH had greater (P < .08) forage dry matter intake and spent an additional 1.2 hours/day (P < .01) grazing compared to the higher SH. Cows on lower SH consumed 7.7 kg/day of forage dry matter and grazed 9.4 hours/day whereas those on higher SH consumed 7.1 kg/day and grazed 8.2 hours/day. Cows on lower SH grazed 0.7 hours/day (P < .06) and 0.4 hours/day (P < .08) longer at 06:00-10:00 hour and 11:00-13:00 hour, respectively, compared to the higher SH. Grazing efficiency (kg of forage consumed/hour of grazing) decreased (P < .01) as season progressed. Season influenced duration of grazing activity (P < .01). Cows grazed 0.5 hours longer (P < .01) at 06:00-10:00 hour late in summer (August) compared to spring (May) and mid summer (June/July). Cows grazed 0.3 hours longer (P < .08) at 11:00-13:00 hour during spring compared to late summer.
Safflower (Carthamus Tintorius): A Promising Forage Crop For Semi-Arid Regions, Y. Leshem, I. Bruckental, S. Y. Landau, G. Ashbell, Z. Weinberg
Safflower (Carthamus Tintorius): A Promising Forage Crop For Semi-Arid Regions, Y. Leshem, I. Bruckental, S. Y. Landau, G. Ashbell, Z. Weinberg
IGC Proceedings (1977-2023)
The yield, quality, preservation and intake of safflower hay were determined in two successive years - 1998 and 1999. Field experiments carried out at the Bet Dagan experimental station on the coastal plain of Israel under rain-fed conditions. A spineless variety was tested under three sowing dates. Yield decreased and quality improved as the sowing date receded from November 12 to February 3. Respective yields, IVDMD and CP content were: 22 and 8 ton DM/ha, 48.9% and 65.5% , 10.0% and 14.6%. Safflower at 290, 410 and 770 g/kg DM was ensiled in 1.5-l anaerobic glass jars with or without …
The Adoption Of Sustainable Grazing Land Management Practices In The Burdekin Rangelands Of Northern Australia, Robert N. Shepherd
The Adoption Of Sustainable Grazing Land Management Practices In The Burdekin Rangelands Of Northern Australia, Robert N. Shepherd
IGC Proceedings (1977-2023)
No abstract provided.
An Economic Assessment Of Cattle Raising Enterprises In The Red Soils Region Of China, Neil D. Macleod, Shilin Wen
An Economic Assessment Of Cattle Raising Enterprises In The Red Soils Region Of China, Neil D. Macleod, Shilin Wen
IGC Proceedings (1977-2023)
No abstract provided.
The Changes In The Management Of Permanent Grasslands In The Cr After Agriculture Restructuring At The End Of The 20th Century, A. Kohoutek, Jan Pozdíšek
The Changes In The Management Of Permanent Grasslands In The Cr After Agriculture Restructuring At The End Of The 20th Century, A. Kohoutek, Jan Pozdíšek
IGC Proceedings (1977-2023)
No abstract provided.
Ground Ear Maize As An Alternative Forage Source For Beef Cattle In Ireland, P. O'Hanlon, D. Kenny, Tommy M. Boland, G. P. Keane, M. Bridget Lynch
Ground Ear Maize As An Alternative Forage Source For Beef Cattle In Ireland, P. O'Hanlon, D. Kenny, Tommy M. Boland, G. P. Keane, M. Bridget Lynch
IGC Proceedings (1977-2023)
No abstract provided.
The Influence Of Sward Quality On Enteric Methane Production By Zero Grazed Beef Cattle, K. J. Hart, P. Martin, D. Kenny, P. Foley, F. P. O'Mara, Tommy M. Boland
The Influence Of Sward Quality On Enteric Methane Production By Zero Grazed Beef Cattle, K. J. Hart, P. Martin, D. Kenny, P. Foley, F. P. O'Mara, Tommy M. Boland
IGC Proceedings (1977-2023)
No abstract provided.
Germination Capacity Of Zoysia Japonica Seeds In The Droppings Of Cattle And Goats, Xueyong Zhang, Yunfei Yang
Germination Capacity Of Zoysia Japonica Seeds In The Droppings Of Cattle And Goats, Xueyong Zhang, Yunfei Yang
IGC Proceedings (1977-2023)
No abstract provided.
Different Reactions Of Plants And Insect Taxa To Reduction Of Stocking Rate: A Concrete Reason To Promote Habitat Heterogeneity In Grazing Systems, Bertrand Dumont, Anne Farruggia, J.-P. Garel
Different Reactions Of Plants And Insect Taxa To Reduction Of Stocking Rate: A Concrete Reason To Promote Habitat Heterogeneity In Grazing Systems, Bertrand Dumont, Anne Farruggia, J.-P. Garel
IGC Proceedings (1977-2023)
No abstract provided.
Sustainability Of Semi‐Arid Extensive Livestock Systems In Senegal: Elements For Modelling Animal‐Plant Interactions, G. Chirat, F. Bocquier, F. Bousquet, A. Ickowicz
Sustainability Of Semi‐Arid Extensive Livestock Systems In Senegal: Elements For Modelling Animal‐Plant Interactions, G. Chirat, F. Bocquier, F. Bousquet, A. Ickowicz
IGC Proceedings (1977-2023)
No abstract provided.
Prediction Of Methane Emission Of Dairy Cows Offered Fresh Grass At Maintenance Level, Tianhai Yan, C. S. Mayne
Prediction Of Methane Emission Of Dairy Cows Offered Fresh Grass At Maintenance Level, Tianhai Yan, C. S. Mayne
IGC Proceedings (1977-2023)
No abstract provided.
Productive Performance Of Goats And Calves Fed Different Levels Of Mulberry Forage, H. Manterola, D. Cerda
Productive Performance Of Goats And Calves Fed Different Levels Of Mulberry Forage, H. Manterola, D. Cerda
IGC Proceedings (1977-2023)
No abstract provided.
Multi‐Functionality Of Mediterranean Herbaceous Rangelands In Israel: A Comprehensive Pastoral/Grazing System Approach, Zalmen Henkin, S. Y. Landau, Eugene D. Ungar, Avi Perevolotsky, Marcelo Sternberg
Multi‐Functionality Of Mediterranean Herbaceous Rangelands In Israel: A Comprehensive Pastoral/Grazing System Approach, Zalmen Henkin, S. Y. Landau, Eugene D. Ungar, Avi Perevolotsky, Marcelo Sternberg
IGC Proceedings (1977-2023)
No abstract provided.
Legumes Versus Nitrogen Fertilizer To Increase Production From Warm‐Season Grass Pastures, Bruce Anderson
Legumes Versus Nitrogen Fertilizer To Increase Production From Warm‐Season Grass Pastures, Bruce Anderson
IGC Proceedings (1977-2023)
No abstract provided.
Choice By Cattle Between Conterminous Monocultures Of Two Tropical Grasses, Masahiko Hirata
Choice By Cattle Between Conterminous Monocultures Of Two Tropical Grasses, Masahiko Hirata
IGC Proceedings (1977-2023)
No abstract provided.
Impacts And Adaptation To Climate Change In Beef Production Systems In Central Queensland, David H. Cobon, N. R. Toombs
Impacts And Adaptation To Climate Change In Beef Production Systems In Central Queensland, David H. Cobon, N. R. Toombs
IGC Proceedings (1977-2023)
No abstract provided.
Can Grazing Species Be Used To Manipulate The Amount Of Nitrogen Leaching To Groundwater?, Coby J. Hoogendoorn, Keith Betteridge, Sterwart F. Ledgard, Des A. Costall, Z. A. Park, P. W. Theobald
Can Grazing Species Be Used To Manipulate The Amount Of Nitrogen Leaching To Groundwater?, Coby J. Hoogendoorn, Keith Betteridge, Sterwart F. Ledgard, Des A. Costall, Z. A. Park, P. W. Theobald
IGC Proceedings (1977-2023)
No abstract provided.
Factors Influencing The Spatial Distribution Of Beef Cattle On Mediterranean Rangeland, Amit Dolev, Eugene D. Ungar, Zalmen Henkin
Factors Influencing The Spatial Distribution Of Beef Cattle On Mediterranean Rangeland, Amit Dolev, Eugene D. Ungar, Zalmen Henkin
IGC Proceedings (1977-2023)
No abstract provided.
Vertical Distribution Of Plant Parts And The Selectivity Of Harvesting Heights By Cattle In Miscanthus Sinensis, T. Takahashi, Shin-Ichiro Ogura, K. Sugawara
Vertical Distribution Of Plant Parts And The Selectivity Of Harvesting Heights By Cattle In Miscanthus Sinensis, T. Takahashi, Shin-Ichiro Ogura, K. Sugawara
IGC Proceedings (1977-2023)
No abstract provided.
Effects Of Cattle Grazing On Survival And Regrowth Of Miscanthus Sinensis Tillers, T. Takahashi, T. Shishido, Shin-Ichiro Ogura, S. Sato
Effects Of Cattle Grazing On Survival And Regrowth Of Miscanthus Sinensis Tillers, T. Takahashi, T. Shishido, Shin-Ichiro Ogura, S. Sato
IGC Proceedings (1977-2023)
No abstract provided.
Changes In Sward Composition Under Different Grazing Management, V. Pavlů, Michal Hejcman, L. Pavlů, Jan Gaisler
Changes In Sward Composition Under Different Grazing Management, V. Pavlů, Michal Hejcman, L. Pavlů, Jan Gaisler
IGC Proceedings (1977-2023)
No abstract provided.
Sward Structure And Foraging Behaviour Of Cattle Grazing Reproductive Tropical Pastures, Marcelo A. Benvenutti, I. J. Gordon, Dennis P. Poppi
Sward Structure And Foraging Behaviour Of Cattle Grazing Reproductive Tropical Pastures, Marcelo A. Benvenutti, I. J. Gordon, Dennis P. Poppi
IGC Proceedings (1977-2023)
No abstract provided.
Effects Of Grass Growth Stage On Metabolisable Energy Concentration Of Fresh Grass, Tianhai Yan, C. P. Ferris, M. G. Porter, C. S. Mayne
Effects Of Grass Growth Stage On Metabolisable Energy Concentration Of Fresh Grass, Tianhai Yan, C. P. Ferris, M. G. Porter, C. S. Mayne
IGC Proceedings (1977-2023)
No abstract provided.
Fodder Seed Bank–An Initiative For Green Fodder Production During Lean Period By Kvk, Jehanabad Under Nicra Project, Shobha Rani, R. K. Sohane, Dinesh Mahto, Basant Kumar Sharma
Fodder Seed Bank–An Initiative For Green Fodder Production During Lean Period By Kvk, Jehanabad Under Nicra Project, Shobha Rani, R. K. Sohane, Dinesh Mahto, Basant Kumar Sharma
IGC Proceedings (1977-2023)
Fodder production is an often-overlooked aspect of livestock rearing. The scarcity of fodder during lean period poses great problem before the livestock owners. The case with availability of green fodder is even more serious. Green fodder is essential for feeding of the dairy animals as poor nutrition is the biggest constraint in animal production, especially in dairy cattle production. This problem arises mainly due to the fact that ruminants are basically fed with fibrous forages and low quality roughages such as straws, especially during the lean seasons. The fodder seed availability is a major constraint apart from the interest of …