锌盐对饲料蛋白质保护效果的研究  

Effects of zinc-treated feedstuffs on degradability of crude protein

作　　者：任莉[1] 龚月生[2] 张力[3] 芦志刚[1] 

机构地区：[1]湛江海洋大学农学院,广东湛江524025 [2]西北农林科技大学动物科技学院,陕西杨凌712100 [3]中国农科院兰州畜牧与兽药研究所,甘肃兰州730050

出　　处：《西北农林科技大学学报（自然科学版）》2004年第6期41-44,共4页Journal of Northwest A&F University(Natural Science Edition)

基　　金：农业部"九五"重点攻关课题(95M02)"畜禽营养需要及调控新技术研究与开发"的部分内容

摘　　要：　分别用ZnCl2和ZnSO4处理豆粕、棉籽粕、菜籽粕和胡麻粕等4种饲料,用尼龙袋法测定蛋白质在瘤胃的降解率,探讨锌盐对饲料蛋白质的保护效果。结果表明,ZnCl2和ZnSO4可以降低饲料蛋白质在瘤胃的降解率,能够保护饲料蛋白质,提高过瘤胃蛋白的数量。从降解动力学分析,ZnCl2或ZnSO4降低了饲料蛋白质的快速降解部分和降解速度,从而降低了蛋白质的有效降解率。0.5%ZnCl2处理可使豆粕、棉籽粕、菜籽粕和胡麻粕蛋白质的有效降解率分别降低8.2%,3.8%,14.9%和9.8%;0.65%ZnSO4处理可使豆粕、棉籽粕、菜籽粕和胡麻粕蛋白质的有效降解率分别降低6.4%,12.6%,11.7%和15.4%。The effects of treating soybean meal (SBM),cottonseed meal (CSM),rapeseed meal (RSM) and flax meal (FM) with zinc chloride at 0.5% of DM content,with zinc sulfate at 0.65% of DM content respectively,on CP degradability in the rumen were investigated.The trial results showed:(1) CP effective degradability was decreased by ZnCl_2 or ZnSO_4 treatment.With 0.5% ZnCl_2 treatment,CP effective degradability was decreased by 8.2%,3.8%,14.9% and 9.8% for SBM,CSM,RSM and FM respectively.With 0.65% ZnSO_4 treatment,CP effective degradability was decreased by 6.4%,12.6%,11.7% and 15.4% for SBM,CSM,RSM and FM respectively.(2) CP effective degradability was decreased by ZnCl_2 or ZnSO_4 treatment,which reduced immediately the degraded fraction and degradation rate.

关 键 词：锌盐 饲料蛋白质 保护效果 尼龙袋法 瘤胃降解率 降解动力学 蛋白质保护剂 

分 类 号：S816.4[农业科学—饲料科学]