刈割与放牧结合对苜蓿型混播草地系统的影响  

Effects of Integrating Grazing with Cutting on Mixed Pasture of Alfala Type

作　　者：贾笃敬[1] 符义坤[1] 李光棣 张景雨[1] 

机构地区：[1]甘肃农业大学草业学院

出　　处：《甘肃农业大学学报》1998年第1期32-37,共6页Journal of Gansu Agricultural University

基　　金：国家自然基金

摘　　要：对以苜蓿为主的混播草地，在前期刈割的基础上采用低、中和高３种放牧率进行轮牧。结果表明：６０ｄ放牧后，在各放牧处理间的土壤水分和容重均无显著差异（Ｐ＞０．０５）；其牧草干物质含量和总产量均无显著影响（Ｐ＞０．０５），它们的主要影响因素是牧草生长阶段，利用时期和牧草种类。供试羔羊的个体增重和产肉量随放牧强度增加而减少，其单位草地面积的增重和产肉量，在一定范围内随放牧强度增加而提高。苜蓿草地的放牧利用以中等放牧强度为宜。A mixed pasture dominated mainly by alfalfa was grazed rotationally with three stocking rates at low, medium and high levels on the basis of early cutting The results showed that there were no significant variances ( P> 0 05) among the three treatments in soil moisture and volume weight after 60 days grazing. Effects of the treatments on dry matter content and yield varied not significantly. Main factors affecting the sward were growth stage, using period and herbage composition. Live weight gains and lamb meat yield individually for the tested lambs decreased as the increasing of stocking rates. However, live weight gains and lamb meat yield per unit area of grassland raised significantly ( P< 0.05) with the increasing of stocking rates within a certain range. Mixed pasture of alfalfa type is suited to grazing at a medium intensity.

关 键 词：苜蓿 混播草地 放牧 刈割 

分 类 号：S812.3[农业科学—草业科学]