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Nutrient digestibility, nitrogen excretion, and milk production of mid-lactation Jersey × Friesian cows fed diets containing different proportions of rumen-undegradable protein
Faculty
Agriculture
Year:
2020
Type of Publication:
ZU Hosted
Pages:
Authors:
Adham Abdallah Alsogayer
Staff Zu Site
Abstract In Staff Site
Journal:
An Acad Bras Cienc Academia Brasileira de Ciencias
Volume:
Keywords :
Nutrient digestibility, nitrogen excretion, , milk production
Abstract:
The present study was planned to test the hypothesis that feeding lactating dairy cattle with varying levels of rumen-undegradable protein (RUP) can enhance protein utilization, milk production, milk protein, and nitrogen (N) excretion. Forty midlactating crossbred (Jersey × Friesian) cattle were randomly divided into four groups. Four treatment diets were formulated to contain 30%, 40%, 50%, and 60% RUP of crude protein. Dry matter (DM) and crude protein intakes were significantly reduced with increasing dietary RUP levels. Crude protein digestibility increased linearly with incremental increases in dietary RUP levels. Cattle fed 60% RUP showed a linear decrease in N intake compared to that in the other groups. A linear decrease in urinary N and linear increases in net N, milk N, and N-use efficiency were observed with increasing dietary RUP levels. Actual milk, energy-corrected milk, and 4% fat-corrected milk yields (kg/day) increased linearly with an increasing degradability of protein. However, milk protein, solids not fat and total solids, as well as the yields of protein, fat, and lactose, showed significant increases with increased RUP supplementation. Collectively, the results indicate that formulating dairy cow diets to contain 60% RUP results in better lactating performance and N-use efficiency and lower N excretion.
Author Related Publications
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Adham Abdallah Alsogayer, "Palliative effects of extra virgin olive oil, gallic acid, and lemongrass oil dietary supplementation on growth performance, digestibility, carcass traits, and antioxidant status of heat-stressed growing New Zealand White rabbits", Springer, 2017
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Adham Abdallah Alsogayer, "Alleviation of heat-stress-related physiological perturbations in growing rabbits using natural antioxidants", Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, O.A, M.P. (INIA), 2018
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Department Related Publications
Ismail Elsayed Ismaeil Attia, "EFFECT OF DIETARY NITRATE ON GROWTH PERFORMANCE, SOME BLOOD BIOCHEMICAL AND HISTOPATHOLOGICAL STATUS OF RABBITS", Egyptian J. Nutrition and Feeds, 2013
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Ismail Elsayed Ismaeil Attia, "NITRATE TOXICITY IN RABBITS: 4. DETOXIFICATION OF DIETARY NITRATE BY ACTIVATED CHARCOAL.", Egyptian J. Nutrition and Feeds, 2013
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Olwi Ali Mohamed Hasanien, "Effect of supplementation of Yucca Schidigera extract to growing rabbit diets on growth performance, carcass characteristics, serum biochemistry and liver oxidative status.", Asian Journal of Animal and Veterinary Advances, 9 (11) : 732-742, 2014., 2014
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Zenat Abdelgawad Ibrahim Elsayed , "The effectiveness of dietary sunflower meal and exogenous enzyme on growth, digestive enzymes, carcass traits, and blood chemistry of broilers", Environmental Science and Pollution Research, 2017
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Mahmoud Mohamed Ibrahiem Ibrahiem Elagawany, "The effectiveness of dietary sunflower meal and exogenous enzyme on growth, digestive enzymes, carcass traits, and blood chemistry of broilers", Environmental Science and Pollution Research, 2017
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