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Articles 1 - 17 of 17
Full-Text Articles in Physical Sciences and Mathematics
Dairy Cow Performance On Pasture-Based Feeding Systems And In Confinement, Renato S. Fontaneli, Lynn E. Sollenberger, C. R. Staples
Dairy Cow Performance On Pasture-Based Feeding Systems And In Confinement, Renato S. Fontaneli, Lynn E. Sollenberger, C. R. Staples
IGC Proceedings (1997-2023)
Interest in grazing systems is growing among farmers in the USA as a means of reducing feed costs for lactating dairy cows. An experiment was conducted near Gainesville, FL to compare milk production and composition and milk income minus feed costs from two pasture-based systems with those of a conventional confinement housing system over a 276-d period. System 1 was based on a mixture of rye (Secale cereale L.), annual ryegrass (Lolium multiflorum Lam.), crimson clover (Trifolium incarnatum L.), and red clover (Trifolium pratense L.) during the winter-spring seasons and pearl millet (Pennisetum glaucum [L.] …
Intake Estimation Of Rams Under Grazing Condition In A Deferred Pastures Of Panicum Coloratum By Two Techniques, C. M. Ferri, M. A. Brizuela, N. P. Stritzler, H. J. Petruzzi
Intake Estimation Of Rams Under Grazing Condition In A Deferred Pastures Of Panicum Coloratum By Two Techniques, C. M. Ferri, M. A. Brizuela, N. P. Stritzler, H. J. Petruzzi
IGC Proceedings (1997-2023)
The goal of this study was to quantify the organic matter intake (OMI) of Pampinta rams grazing in a Panicum coloratum cv Verde differed pasture. The OMI was compared by two methods: a) the difference between the forage measured in pre and post-grazing condition, and b) the faecal production:digestibility ratio of the diet, estimated by total faecal gathering, and from the quantity of total faecal N in g per 100 g-1 of OMI and the concentration of total faecal N, respectively. The OMI estimated by difference between the forage measured in pre and post-grazing was 9 % higher (P …
Estimation Of Organic Matter Digestibility And Intake From Faecal Organic Matter And Daily N Excretion And Concentration, C. M. Ferri, N. P. Stritzler, M. A. Brizuela
Estimation Of Organic Matter Digestibility And Intake From Faecal Organic Matter And Daily N Excretion And Concentration, C. M. Ferri, N. P. Stritzler, M. A. Brizuela
IGC Proceedings (1997-2023)
This study was performed with grazing sheep, to establish: a) if the amount of total faecal N (C; in g 100g-1 of organic matter intake (OMI)) remains constant at three feeding levels, in four utilisation periods of deferred Panicum coloratum cv. Verde; b) the relationship between C and faecal N fractions, and c) the relationship between faecal daily excretion of OM and N, and OMI. Intake increased (P< 0.01) with utilisation period, and was related (r = - 0.82; P< 0.01) to the protein content of food, the insoluble N fraction (r = -0.49; P< 0.01) and the soluble:insoluble N ratio (r = 0.41; P< 0.01) in faeces. No relation with total N concentration (r = -0.22; P> 0.05) or soluble N fraction (r = -0.02; P> 0.05) in faeces could be found. Daily excretion of OM and N were positively related (R2 = 0.93 and 0.96, respectively; …
Quality Of Ammoniated Brachiaria Decumbens Hay, L. O. Fernandes, Ricardo A. Reis, L. R. A. Rodrigues
Quality Of Ammoniated Brachiaria Decumbens Hay, L. O. Fernandes, Ricardo A. Reis, L. R. A. Rodrigues
IGC Proceedings (1997-2023)
The experiment was conducted at UNESP-Jaboticabal to evaluate the quality of Brachiaria decumbens hays harvested after seed ripening. The hays were submitted to the following treatments: control, anhydrous ammonia (3.0% NH3 in the DM), and urea (5.0% in the DM). The chemical composition, digestibility and the performance of steers were evaluated using a complete randomized block design with three treatments and six replications. The ammoniation either with NH3 or urea increased (P< 0.05) the CP content, and the IVDMD. The NH3 treatment reduced (P < 0.05) the contents of NDF and ADF, and the urea application reduced (P < 0.05) the contents of hemicellulose and lignin. The ammoniation did not affect (P > 0.05) the neutral detergent insoluble nitrogen, and acid detergent insoluble nitrogen values. Steers receiving Brachiaria hay plus soybean meal (1.08 kg DM.day), hay …
Roots And Potatoes As Supplements To An Alfalfa – Grass Diet To Dairy Cows, T. Eriksson, P. Ciszuk, E. Burstedt
Roots And Potatoes As Supplements To An Alfalfa – Grass Diet To Dairy Cows, T. Eriksson, P. Ciszuk, E. Burstedt
IGC Proceedings (1997-2023)
Fourteen multiparous dairy cows were used in 3 x 3 change-over experiment designed to study effects of replacing barley by roots and potatoes in diets based on leguminous forage on feed intake, milk production and utilisation of feed nitrogen. The cows received a mixture of alfalfa (Medicago L.) and grass silage ad libitum and an isoenergetic quantity of a supplement based on either barley and potatoes (Ba/P), fodder beets (Beta vulgaris L.) and potatoes (Be/P) or barley (Ba). The grass in grass silage was dominated by timothy (Phleum pratense L.). Total DM intake as well as yield …
Intake Characteristics And Performance Of Contrasting Grass Varieties Continuously Stocked With Sheep, R. J. Orr, J. E. Cook, R. A. Champion, A. J. Rook
Intake Characteristics And Performance Of Contrasting Grass Varieties Continuously Stocked With Sheep, R. J. Orr, J. E. Cook, R. A. Champion, A. J. Rook
IGC Proceedings (1997-2023)
Fifteen intermediate-heading perennial ryegrass (Lolium perenne) varieties were grazed by sheep under continuous variable stocking management. Mean daily grass dry matter intake per ewe was positively correlated with liveweight gain per ewe (r = 0.63) and per ha (r = 0.58) over an 8-month grazing season. Daily intake was not correlated with grazing time (r = 0.12) but was positively correlated with instantaneous dry matter intake rate (r = 0.75). Breeding varieties with high intake rate characteristics should allow increases in the contribution of grazed grass to grassland-based livestock farming. There is now a …
Intake And Digestibility Of Black Locust Foliage Fed To Growing Goat Wethers, L. J. Unruh, J-M. Luginbuhl, J. P. Mueller
Intake And Digestibility Of Black Locust Foliage Fed To Growing Goat Wethers, L. J. Unruh, J-M. Luginbuhl, J. P. Mueller
IGC Proceedings (1997-2023)
Leaves of Black locust (BL, Robinia pseudoacacia), a native southeastern United States tree species known to contain substantial levels of condensed tannins, were fed to 16, four month old (20.4 kg body weight [BW]) Boer wether goats (Capra hircus hircus) to determine their effects on intake and digestibility. Four diets were stall fed in a randomized complete block design (RCBD) with four replications. Diets included: (1) 100% eastern gamagrass (EGH; Tripsacum dactyloides) hay; (2) 70% EGH and 30% mixture of ground corn (GC; Zea mays) and soybean (Glycine max) meal (SBM); (3) 75% …
Intake And Qualitative Aspects Of Guinea Grass Grazed By Sheep Over Three Different Seasons, Willem A. Van Niekerk
Intake And Qualitative Aspects Of Guinea Grass Grazed By Sheep Over Three Different Seasons, Willem A. Van Niekerk
IGC Proceedings (1997-2023)
The objective of this study was to determine the influence of season on intake by sheep as well as certain selected qualitative characteristics of Panicum maximum (cv Gatton) (Guinea grass) at the mature growing stage. The lower DM content of the spring and summer grass (41.6 and 40.2%) did not hamper DOMI (48.1 and 26.7 W0.75/d), respectively. The N concentration of the spring and summer grass was well within the limit required for optimal rumen microbial production (1.8 - 2.0%). The high cell wall components of the winter grass resulted most probably in a significant lower IVDOM value …
Prediction Of Intake Of Hay Differing In Species And Maturity By Goats, S. W. Coleman, S. P. Hart, T. Sahlu
Prediction Of Intake Of Hay Differing In Species And Maturity By Goats, S. W. Coleman, S. P. Hart, T. Sahlu
IGC Proceedings (1997-2023)
Eight species of forage, a cool-season perennial (Festuca arundinacea) and annual grass (Triticum aestivum), four warm-season perennial grasses (Bothriochloa caucasica, B. ischaemum, Cynodon dactylon, and Tripsacum dactyloides), a warm season annual (Digitaria sanguinalis) and a perennial legume (Medicago sativa), were cut at two or three maturities to provide a wide array of quality difference (n=20). Twenty wether goats (Capra hicus) were fed the hays in four different trials using an incomplete block so that each hay was fed to four different goats. Alfalfa produced the highest DM, …
Foraging Behaviour And Intake In Temperate Cultivated Grasslands, S. Prache, J. L. Peyraud
Foraging Behaviour And Intake In Temperate Cultivated Grasslands, S. Prache, J. L. Peyraud
IGC Proceedings (1997-2023)
In temperate areas, grazing provides a large part of the nutrient requirements of ruminants and may be an important form of land use. In Europe, grassland occupies some 150 million hectares, and grazing provides about 60 to 75% of the nutrient requirements of cattle (Wilkins and Vidrih 2000). From the end of the 80’s, agricultural surpluses in Europe have led to production quotas and increased interest in more extensive systems. At the beginning of the 90’s, the emergence of the notion of sustainable agriculture combining economic, social (concerns in dereliction of less-favoured rural areas), and environmental issues (pollution, loss of …
Foraging Strategies On Rangeland: Effects On Intake And Animal Performance, Peter O’Reagain
Foraging Strategies On Rangeland: Effects On Intake And Animal Performance, Peter O’Reagain
IGC Proceedings (1997-2023)
Rangelands exhibit extreme spatial and temporal variability in forage quality and availability. The animals that utilise these rangelands have consequently evolved a range of foraging strategies in an attempt to cope with this variability and maintain nutrient intake. In general, animals respond to and exploit spatial variability at all scales by selecting those items or units which optimise the intake of digestible nutrients and hence animal production. Animals similarly employ a variety of strategies to cope with temporal variability on rangelands. These strategies may include adjusting foraging behaviour and/or exploiting critical resources or resource areas to buffer temporal variability in …
Sugar Cane Silage (Saccharum Officinarum L.) Hydrolyzed With Calcium Hydroxide, J. A. Lima, E. A. Cunha, E. F. Júnior, M. S. Bueno, F. Okamoto
Sugar Cane Silage (Saccharum Officinarum L.) Hydrolyzed With Calcium Hydroxide, J. A. Lima, E. A. Cunha, E. F. Júnior, M. S. Bueno, F. Okamoto
IGC Proceedings (1997-2023)
No abstract provided.
In Vivo Digestibility, Intake And Nitrogen Balance Of Lambs Fed Different Barley Herbage: Sorghum Silage Diets, M. Arzadun, S. Arias, J. Freddi, A. Piazza
In Vivo Digestibility, Intake And Nitrogen Balance Of Lambs Fed Different Barley Herbage: Sorghum Silage Diets, M. Arzadun, S. Arias, J. Freddi, A. Piazza
IGC Proceedings (1997-2023)
No abstract provided.
Voluntary Intake And Digestibility In Horses: Individual Variability In The Effect Of Forage Quality, N. Edouard, G. Fleurance, W. Martin‐Rosset, P. Duncan, J. P. Dulphy, S. Grange, R. Baumont, H. Dubroeucq, F. J. Pérez‐Barbería, I. J. Gordon
Voluntary Intake And Digestibility In Horses: Individual Variability In The Effect Of Forage Quality, N. Edouard, G. Fleurance, W. Martin‐Rosset, P. Duncan, J. P. Dulphy, S. Grange, R. Baumont, H. Dubroeucq, F. J. Pérez‐Barbería, I. J. Gordon
IGC Proceedings (1997-2023)
No abstract provided.
Evaluation Of The Intake Of Fresh Mulberry (Morus Alba) In Crossbred Large White Pigs: Morphometric, Histological And Hematological Study, Yuvan Contino, F. Ojeda, R. Herrera, Nancy Altunaga, Guadalupe Pérez, J. L. Moliner
Evaluation Of The Intake Of Fresh Mulberry (Morus Alba) In Crossbred Large White Pigs: Morphometric, Histological And Hematological Study, Yuvan Contino, F. Ojeda, R. Herrera, Nancy Altunaga, Guadalupe Pérez, J. L. Moliner
IGC Proceedings (1997-2023)
No abstract provided.
Intake And Nutritional Value Of Brachiaria Brizantha Cv. Marandu In A Silvopastoral System, Rogerio M. Mauricio, N. M. Rodriguz, L. F. Sousa, E. O. S. Saliba, L. C. Gonçalves, G. R. Moreira
Intake And Nutritional Value Of Brachiaria Brizantha Cv. Marandu In A Silvopastoral System, Rogerio M. Mauricio, N. M. Rodriguz, L. F. Sousa, E. O. S. Saliba, L. C. Gonçalves, G. R. Moreira
IGC Proceedings (1997-2023)
No abstract provided.
An Investigation On Diet Selection By Sheep And Goats In Steppe Regions Of Yazd Province, Iran, Anahita Rashtian, Mansour Mesdaghi, Masoume Amirkhani
An Investigation On Diet Selection By Sheep And Goats In Steppe Regions Of Yazd Province, Iran, Anahita Rashtian, Mansour Mesdaghi, Masoume Amirkhani
IGC Proceedings (1997-2023)
No abstract provided.