TY - JOUR JF - JCPP JO - VL - 6 IS - 4 PY - 2003 Y1 - 2003/1/01 TI - Effect of Two Urea Levels on Chemical Composition and Digestibility of Whole-crop Barley Silage and on Feedlot Performance of Lambs TT - اثر دو سطح اوره بر ترکیب شیمیایی و گوارش‌ پذیری گیاه جو سیلو شده و ویژگی‌های پرواربندی گوسفند N2 - The effect of adding two urea levels (0.5 and 0.75% on fresh basis) to whole-crop barley (WCB) on chemical compositon and digestibility in Ghezel rams was studied. The effect of including these silages in the ration of fattening Ghezel and Mehraban rams was also investigated. Urea supplementation of WCB silage resulted in an increase in pH, total nitrogen level, and ammonia-nitrogen concentrations (P0.05), but apparent digestibility coefficient of total nitrogen was higher for 0.5% urea-WCB silage. Apparent digestibility coefficients of total nitrogen and nitrogen balance were higher for 0.5% urea-WCB silage than for 0.75% urea-WCB silage, but the differences were not significant. Ruminal fluid pH at 2.5 h, and ammonia-nitrogen concentration at 4 h post-feeding were higher for 0.75% urea-WCB silage than for 0.5% urea-WCB silage (P SP - 127 EP - 139 AU - E. Rowghani Haghighi Fard, AU - M. J. Zamiri, AD - KW - Whole-crop barley silage KW - Urea KW - Digestibility KW - BUN KW - Feedlot performance UR - http://jcpp.iut.ac.ir/article-1-142-en.html ER -