Volume 5, Issue 3 (fall 2001)                   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. Journal of Crop Production and Processing 2001; 5 (3) :167-178
URL: http://jcpp.iut.ac.ir/article-1-74-en.html
Abstract:   (33398 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: General

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