不同季节南方人工改良草地载畜量研究  

Study on stocking rate of improved pastures in different seasons in southern China

作　　者：朱晓艳[1,2] 张英俊[2] 刘荣堂[1] 段国会 王金贵 胡超 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]中国农业大学草地研究所,北京100193 [3]会泽县田坝乡畜牧兽医站,云南曲靖654219 [4]平顶山市农业科学院,河南平顶山467001

出　　处：《草原与草坪》2011年第4期64-69,共6页Grassland and Turf

基　　金：现代农业产业技术体系建设专项资金(nycytx-037);行业科技(200903060)资助

摘　　要：在南方高海拔山区,研究不同放牧强度(7.5、15、30和45羊/hm2)和放牧季节对人工改良草地和家畜生产性能的影响,对不同季节人工改良草地适宜载畜量进行探讨。结果表明:不同放牧强度对地上现存量和家畜生产性能有显著影响(P<0.05)。地上现存量(Yh,g/m2)与放牧率(S,羊/hm2)之间呈线性负相关;日增重(Ya)和放牧率(S)之间呈线性负相关;公顷增重(Gh)和放牧率(S)之间呈二次方相关;冬春和夏秋季节公顷最大增重时的适宜放牧率分别为10.7和30.3羊/hm2,最大地上现存量分别为134.1 g/m2和153.8 g/m2,表明南方人工改良草地冬春季节和夏秋季节适宜的草地利用率分别为35.7%和65.7%。The improved pasture productivity（by Lolium perenne, Dactylsi glomerata and Tri folium re pens ）and goat performance were studied under 4 different stocking rates（7.5,15,30 and 45 goat/ha）, in order to explore a suitable stocking rate. The results showed that the stocking rate had significant effects on herbage present and goat performance （P〈0.05）. There were linearly negative correlations between herbage present （Yh ,g/m2） and stocking rate（S） ;Average daily gain（Ya）and stocking rate（S）showed linearly negative correlations too;The relationships between stocking rate and gain per hectare meet quadratic correlations. The stocking rates in maximum gain per hectare were 10.7 and 30.3 goat/ha, the maximum herbage present were 134.1 g/m2 and 153.8 g/m2 in winter-spring and summer-autumn seasons respectively. The results indicated that the proper pasture utilization rate was 35.7% in winter-spring season and 65.7% in summer-autumn season.

关 键 词：人工改良草地 放牧率 地上现存量 山羊增重 

分 类 号：S812[农业科学—草业科学]