日粮系酸力水平对羔羊消化道生理指标和血液生化指标的影响  

Research of acid-binding capacity level on assimilation enzyme and blood index of lamps

作　　者：王永军[1] 卢宁[1] 杨靖宇[1] 田秀娥[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2009年第8期70-74,80,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家公益性行业科研专项(Nyhyzx07-037)

摘　　要：【目的】研究不同日粮系酸力水平对羔羊消化道生理指标和血液生化指标的影响,为探索早期断奶羔羊日粮中酸化剂的作用机理提供理论依据。【方法】将24只7日龄萨能奶山羊羔羊（♂）随机分为4组,分别饲喂日粮系酸力水平为41.3（A组,CK）,39.3（B组）,35.2（C组）和31.1（D组）mmol/hg的试验日粮,分析测定20~48日龄羔羊消化道主要生理指标和血液生化指标。【结果】B、C、D组羔羊瘤胃和十二指肠pH值持续下降,与A组差异均极显著（P＜0.01）;B、C、D组均极显著提高了羔羊胃蛋白酶、十二指肠胰蛋白酶和胰淀粉酶的活性（P＜0.01）,其中肠胰蛋白酶活性随日粮系酸力水平的降低持续增加,而胃蛋白酶和肠胰淀粉酶活性则表现为先升高后降低的变化趋势,以系酸力为35.2 mmol/hg的C组酶活性最高;降低日粮系酸力水平的B、C、D组均较A组极显著（P＜0.01）提高了羔羊血清总蛋白水平,降低了血糖和尿素氮质量浓度。【结论】降低日粮系酸力水平可改善羔羊消化道微环境,有效提高羔羊血清总蛋白水平,降低血糖和尿素氮浓度,有利于提高羔羊对营养物质的消化利用率。【Objective】 The research was to provide a theoretical basis for exploring acidifier mechanism of early-weaned lambs rations,the effects of different acid-binding capacity levels in diet of lambs on digestive tract physiological,and blood biochemical indices were researched in this experiment.【Method】 Twenty-four 7-day-old lambs（♂） of Saanen dairy goats were randomly divided into 4 groups and fed rations based on the acid-binding capacity level 41.3（Group A,CK）,39.3（Group B）,35.2（Group C）,31.1（Group D）mmol/hg respectively. Digestive tract major physiological indices and blood biochemical Indices of 20 to 48-day-old lambs were assayed and analyzed. [Result] pH of rumen and duodenum decreased significantly in the three treatment groups B,C and D （P〈0.01） compared with Group A. The activity of pepsin,duodenum trypsin and pancreatic amylase in the treatment groups increased significantly （P〈0.01）. The activity of duodenum trypsin increased with the decreased rations of acid-binding capacity level, besides,the activity of pepsin and pancreatic amylase rose first and then decreased. When acid-binding capacity level was 35.2 mmol/hg, the activity of enzyme was the best. Serum total protein increased and BUN and blood glucose concentration decreased significantly in the three treatment groups （P〈0.01） compared with Group A. [Conclusion] The low acid-binding capacity level rations can improve microecological environment of digestive tract, and increase TP and decrease Glu and BUN as well, which can improve the digestibility of nutrition in lambs.

关 键 词：系酸力水平 pH值 酶活性 血糖浓度 血清总蛋白浓度 血清尿素氮浓度 

分 类 号：S815.1[农业科学—畜牧学] S827.41[农业科学—畜牧兽医]