Slow-release urea partially replace soybean in the diet of Holstein dairy cows: intake, blood parameters, nutrients digestibility, energy utilization, and milk production-Reference-Cited by-同舟云学术

Slow-release urea partially replace soybean in the diet of Holstein dairy cows: intake, blood parameters, nutrients digestibility, energy utilization, and milk production

Published:2021-09-06 Issue:0 Volume:0 Page:
ISSN:2300-8733
Container-title:Annals of Animal Science
language:en
Short-container-title:

Author:

El-Zaiat Hani M.¹²,Kholif Ahmed E.³,Khattab Ibrahim M.⁴,Sallam Sobhy M.A.¹

Affiliation:

1. University of Alexandria , Faculty of Agriculture, Department of Animal and Fish Production , Aflaton St., El-Shatby, P.O Box 21545 , Alexandria , Egypt

2. Sultan Qaboos University , College of Agricultural and Marine Sciences , Department of Animal and Veterinary Sciences , P.O. Box 34, Postal Code 123 , Al-Khod , Oman

3. Dairy Science Department , National Research Centre , 33 Bohouth St. Dokki , Giza , Egypt

4. Department of Animal and Fish Production, Faculty of Desert and Environmental Agriculture , Matrouh University , 51744 Matrouh , Egypt

Abstract

Abstract The present experiment aimed to evaluate the partial replacement of soybean with slow-release urea (Optigen 1200™) in the diet of lactating cows for 84 d. Three-hundred multiparous lactating Holstein (635 ± 25 kg of body weight, BW) cows were stratified by live body weight; parity and previous milk production were randomly assigned into two experimental groups with 150 cows per each treatment. In the control treatment, 25 g soybean meal was replaced by 5.7 g slow-release urea for 84 d. Optigen treatment did not affect feed intake, daily milk production, milk composition, or milk (feed) efficiency; however, increased (P<0.01) total BW gain and daily BW gain. Optigen treatment increased (P<0.01) the digestibility of crude protein and neutral detergent fiber. Optigen treatment increased (P<0.01) estimated N balance, milk urea-N, and net energy (NE) for gain. Without affecting blood total protein, creatinine, urea-N, triglycerides, glucose, β-hydroxybutyrate, or non-esterified free fatty acids, Optigen treatment increased the concentrations of blood albumin and cholesterol compared to the control (P<0.05). In conclusion, slow-release urea could replace soybean meal in ruminant diets with no adverse effects on feed intake, nitrogen utilization, or digestibility; however, improve the total tract digestibility of fiber and crude protein in cows.

Publisher

Walter de Gruyter GmbH

Link

https://www.sciendo.com/pdf/10.2478/aoas-2021-0053

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