滩羊体重对放牧强度的短期效应  

The Reaction of Weight of Tan-Sheep to Grazing Intensity in Short Term

作　　者：田志珍[1] 常生华[1] 肖金玉[1] 侯扶江[1] 南志标[1] 

机构地区：[1]兰州大学草地农业科技学院,甘肃兰州730020

出　　处：《家畜生态》2004年第2期26-28,31,共4页Ecology of Domestic Animal

基　　金：国家自然科学基金重点项目"河西走廊山地绿洲荒漠系统耦合机理与优化耦合模式"(编号:39630250);国家自然科学基金重大研究计划项目"草地农业系统健康评价"(编号:90102011);甘肃省中青年科技基金项目"环县绵羊放牧系统健康评价"(编号:YS021-A21-016)。

摘　　要：　在黄土高原典型草原上进行放牧强度对滩羊体重变化、日增重和草地单位面积畜产品产量影响的研究。结果表明,随着放牧强度的增加,体重变化趋势是240羊·d/hm2>480羊·d/hm2>780羊·d/hm2,日增重差异不显著(P>0.05)。随着放牧时间的延续,日增重在逐渐下降。草地单位面积上畜产品的产出量各处理组间差异均极显著(P<0.01),以780羊·d/hm2组单位面积畜产品产出量最高(76.3kg/hm2·90d)。The research of effect of grazing intensity on weight, daily gain and production of per grassland was carried on losses plateau. The results as follows: with the grazing intensity in creasing, the trend of weight as follws: 240 sheep·d/hm\+2>480 sheep·d/hm\+2·780 sheep·d/hm\+2, but, daily gain among three groups wasn't notability (P>0.05). Daily gain was declined with the time of grazing lasted. Production of per grassland was notability (P<0.01) among three groups, and production of 780 sheep·d/ha was highest, which was 76.3 kg/hm\+2·90d.

关 键 词：滩羊体重 放牧强度 短期效应 日增重 

分 类 号：S826[农业科学—畜牧学]