مطالعه تركيب شيميايي و ارزش غذايي بوته طالبي سيلو شده در شرايط برون تني و اثر تغذيه آن بر عملكرد بره‌هاي افشاري

Study of chemical composition and nutritive value of cantaloupe silage in in vitro and the effect of feeding on performance of Afshari lambs

به منظور ارزيابي تاثير سيلو كردن و افزودن اوره بر تركيب شيميايي و توليد گاز بوته طالبي و استفاده از آن در تغذيه گوسفند دو آزمايش انجام شد. در آزمايش اول بوته تازه طالبي با مقادير 5/0 و 1 درصد اوره، عمل آوري و در كيسه نايلوني در شرايط اتاق سيلو شد. عمل آوري بوته طالبي با اوره سطح پروتئين خام را نسبت به بوته طالبي سيلو شده بدون افزودني افزايش داد (05/0

Two experiments were conducted to evaluate the chemical composition, gas production and also inclusion of cantaloupe plant and its silage in lamb rations. In first experiment, the cantaloupe plant samples were treated with 0.5 or 1% of urea (DM basis) and ensiled in plastic bags. Ensiling cantaloupe plant treated with urea increased its crude protein content (P<0.05) and its gas production after 96 h incubation as well as metabolizable energy and organic matter digestibility (P<0.05). In the second experiment, cantaloupe plants were ensiled with urea (0.5% DM basis) or without urea. Fifteen male Afshari lambs were allocated to three dietary treatments in a completely randomized design and fed with the experimental diets. Three dietary treatments were 1) diet containing 15% corn silage without cantaloupe plants silage, 2) diet containing 15% cantaloupe silage without urea supplementation, 3) diet containing cantaloupe silage supplemented with 0.5% of urea (DM basis). There were no differences between the dietary treatments in the case of feed intake, average daily gain, final body weight, and rumen pH (P>0.05), but N-ammonia concentration was higher for the urea treated cantaloupe silage (13.5 vs. 10.8 mg/dL) in comparison with the control group (P<0.01). It was concluded that the ensiled cantaloupe plants treated with urea can be utilized in feeding of small ruminant in fattening feedlots with low cost and economical diets instead of corn silage.