陇东黄土高原典型草原滩羊践踏强度与放牧强度关系的研究

Study on Relationship between Sheep Trampling Intensity and Grazing Intensity in Typical Steppe in the Loess Plateau in Eastern Gansu,China

通过在环县典型草原不同放牧强度下轮牧试验的跟群观测,发现放牧强度增加3倍,其践踏强度却增加5倍多,说明践踏作用对放牧的敏感性高于以家畜采食作用为基础的适宜载畜量和放牧强度,获得了家畜践踏强度随放牧强度幂函数式增大的定量结论,说明调控放牧家畜的践踏效应应是放牧管理的一项重要的指标。

Through observing the flocks on the steppe of Huan County in Eastern Gansu province under different grazing intensity,it was found that grazing intensity was increased by three times,correspondingly trampling intensity was increased by more than five times,which showed that trampling effects was more sensitive to grazing than carrying capacity or grazing intensity based on sheep grazing.The regression analysis showed that livestock trampling intensity was increased according to the power function of grazing intensity,which indicated that regulating the trampling effect should be a key index for grazing management.