模拟放牧强度对针茅再生性能的影响

Effect of simulate grazing intensity on regrowth capability of Stipa capillata

通过在昭苏马场设置的轻度放牧、中度放牧、重度放牧和极度放牧4个水平模拟放牧的测定,对针茅Stipa capillata的再生速度、再生草产量和再生速率的变化进行了研究。结果表明,随着放牧时间的变化,针茅的再生速度、再生草产量和再生速率都在减小。再生期间和放牧强度对针茅的再生草产量和再生速率的影响均达到了极显著水平(P<0.01)。在春季利用时随着放牧强度的增加,中度放牧下针茅的再生速度最快,再生草量和再生速率最大。

Four levels of simulate grazing intensity （light, moderate, high and extreme） were designed in Zhaosu Horse Farm to study the effect of simulate grazing intensity on regrowth capability of Stila capillata in terms of variation in regrowth speed, regrowth biomass and rate. The result showed that with the grazing season change, regrowth speed, regrowth biomass and regrowth rate of S. capillata was reduced. The effect of regrowth duration and grazing intensity on regrowth biomass and regrowth rate was significant. In spring, with the increasing grazing intensity, regrowth speed was the highest under moderate grazing with the highest biomass and regrowth rate.