Open Access. Powered by Scholars. Published by Universities.®
- Keyword
- Publication
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Effects Of Feeding Rumen-Degradable Valine On Milk Production In Late-Lactating Dairy Cows, Kayla Hultquist, David Casper
Effects Of Feeding Rumen-Degradable Valine On Milk Production In Late-Lactating Dairy Cows, Kayla Hultquist, David Casper
David Casper
The study objective was to determine if feeding the rumen-degradable AA Val can increase milk production comparable to recombinant bovine somatotropin (bST). Eight multiparous late-lactating (255 ± 26.4 d in milk) Holstein dairy cows were blocked by milk yield (34.1 ± 8.25 kg/d) and randomly assigned to 1 of 4 treatments in a replicated 4 × 4 Latin square design with 21-d periods (7 d for dietary adaptation and 14 d for data collection). Treatments were control (CON), a single injection of recombinant bST (rbST), and Val fed at 40 (V40) and 80 g/d (V80). Cows were fed a total …
Development Of Mathematical Models To Predict Volume And Nutrient Composition Of Fresh Manure From Lactating Holstein Cows, J.A.D. Ranga Niroshan Appuhamy, L.E. Moraes, L.E. Moraes, C. Wagner-Riddle, David Casper, J. France, E. Kebreab
Development Of Mathematical Models To Predict Volume And Nutrient Composition Of Fresh Manure From Lactating Holstein Cows, J.A.D. Ranga Niroshan Appuhamy, L.E. Moraes, L.E. Moraes, C. Wagner-Riddle, David Casper, J. France, E. Kebreab
David Casper
Organic compounds in dairy manure undergo a series of reactions producing pollutants such as ammonia and methane. Because various organic compounds have different reaction rates, the emissions could be accurately determined if amounts and concentrations of individual nutrients in manure are known. A set of empirical models were developed for predicting faecal and urinary water, carbon (C), nitrogen (N), acid detergent fibre and neutral detergent fibre output (kg/day) from lactating Holstein cows. Dietary nutrient contents, milk yield and composition, bodyweight, age and days in milk were used with or without dry matter intake (DMI) as potential predictor variables. Multi-collinearity, goodness …
Prediction Of Total Phenols, Condensed Tannins, And 3-Deoxyanthocyanidins In Sorghum Grain Using Near-Infrared (Nir) Spectroscopy, L. Dykes, L. Hoffmann, O. Portillo-Rodriguez, W.L., Rooney, L.W. Rooney
Prediction Of Total Phenols, Condensed Tannins, And 3-Deoxyanthocyanidins In Sorghum Grain Using Near-Infrared (Nir) Spectroscopy, L. Dykes, L. Hoffmann, O. Portillo-Rodriguez, W.L., Rooney, L.W. Rooney
Elvis A. Heinrichs
The reported high phenolic levels in sorghum have led an interest from sorghum breeding programs in developing and identifying germplasms with high phenolic levels, which require screening a large number of samples to find those with the highest levels. Since wet chemistry screening methods are slow, expensive, and destructive, the use of NIR calibration curves could be an alternative. The objectives of this project were to determine the variation range in total phenols, condensed tannins, and 3-deoxyanthocyanidin levels in a diverse set of sorghum genotypes and to assess the predictive value of NIR curves to estimate these compounds in sorghum. …