模拟放牧强度对燕麦再生性能的影响

Effects of Simulated Grazing Intensity on the Regenerative Properties of Oats

[目的]研究不同放牧强度对燕麦(Avena sativa L.)再生性能的影响。[方法]在拉萨采用刈割模拟放牧的方式设置休牧、轻牧、中牧和重牧4个处理,研究不同放牧强度下燕麦再生速度、再生干草产量和再生速率的变化。[结果]随着放牧强度的增加,燕麦的最大再生速度、再生干草积累量以及最大再生速率均呈下降趋势;再生期内,放牧强度对燕麦最大再生速度、再生干草积累量和最大再生速率的影响均达极显著水平(P<0.01)。[结论]在拉萨种植燕麦刈割后再生性较差,不适宜频繁刈割。

[Objective]To study the effects of different grazing intensity on the regenerating properties of forage oats.[Method]Four treatments for grazing, light grazing, medium grazing and heavy grazing were set up in Lhasa by means of mowing simulated grazing. The changes of regenerating speed, regenerating hay yield and regenerating rate of oats were studied under different grazing intensity.[Result]The maximum regeneration speed, the maximum regenerated hay yield and the maximum regenerated rate of oats decreased with the change of grazing intensity. During the regrowing period, the effects of grazing intensity on the maximum regeneration speed, hay yield and rate of forage oats reached a very significant level( P <0.01).[Conclusion]The reproduction of oats after mowing is poor and is not suitable for frequent mowing.