Volume 5, Issue 3 (fall 2001)                   jwss 2001, 5(3): 167-178 | Back to browse issues page

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Rowghani Haghighi Fard E, Zamiri M. Influence of Varying Levels of Urea Supplementation on the Chemical Composition and Nutritive Value of Corn Silage in Sheep. jwss 2001; 5 (3) :167-178
URL: http://jstnar.iut.ac.ir/article-1-74-en.html
Abstract:   (25449 Views)

Three levels of urea (0, 0.5 and 0.75% on fresh weight basis) were added to whole corn plants to investigate their effects on the chemical composition, and digestibility in 16 Ghezel male lambs using a completely randomized design. Rumen degradability and nutritive values were also evaluated.

 pH, total nitrogen and ammonia-N concentration of silages increased (P<0.05) with the addition of urea. Total nitrogen apparent digestibility was higher (P<0.05) with the urea addition. Nitrogen balance in ruminal fluid increased (P<0.05) with the addition of 0.5% urea. pH and ammonia-N concentration increased (P<0.05) with the addition of urea until 1.5 hr post feeding. Blood serum urea nitrogen concentration was higher (P<0.05) with the addition of urea until 6 hr post feeding. Potential degradability of dry matter and organic matter was higher at 0.5% urea level. Average daily gain increased with the urea addition and was highest (212.88 gr) at 0.75% urea. Subcutaneous fat depth was significantly (P<0.0l) lower for the sheep fed with 0.5% urea-treated silage as compared to other treatments. The results indicated that feed efficiency may be improved by urea addition and that the addition of urea (0.5% on fresh weight basis) may be recommended in order to increase the feeding value of whole corn plants.

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Type of Study: Research | Subject: Ggeneral
Received: 2008/01/9 | Published: 2001/10/15

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