نوع مقاله : مقاله پژوهشی
1 دانشآموخته کارشناسی ارشد گروه علوم دامی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان
2 دانشیار گروه علوم دامی، دانشکده علوم دامی و صنایع غذایی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان
عنوان مقاله [English]
The aim of present experiment was to find the appropriate amount of post-harvested bean by-products (bean residues) in diet of finishing lambs, when was replaced with corn silage or wheat straw in the diet. In this experiment, to determine the nutritional value of bean residues, its chemical composition was measured by standard methods. Then, nine experimental rations were selected as treatment, in which 0, 25, 50, 75 and 100 percent residues of beans were replaced with wheat straw or corn silage. The method of gas production and two-stage digestion was used to determine digestibility and fermentation of these diets. The protein and fat concentrations of bean residues, wheat straw and corn silage used in the present experiment were 6.9, 3.6 and 7.4, and 0.9, 1.8 and 0.3 percent, respectively. Replacing 75 and 100 percent residues of beans with wheat straw and all replacement levels with corn silage, resulted in a significant increase in gas production. The rate of gas production during the replacement of 75% and 100% of the bean residues with corn silage or 25 and 50% with wheat straws were increased compared to the control. The microbial biomass production efficiency was the highest and significantly different with control diet (65 vs. 60.5%, respectively) when replacement of 100% bean residues with wheat straw was done. The replacement of bean residues did not affect the digestibility of dry matter and neutral detergent fiber. Therefore, the 75 and 100% replacement of the bean residues with wheat straw or 25 and 50% with corn silage showed the best result and could be recommended for use in lambs finishing feeding.