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.
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)。
