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.
出处
《草原与草坪》
CAS
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
