摘要
草坪枯草层对雨水或灌溉水的截流量大小对于草坪水分利用效率具有重要影响。针对结缕草草坪枯草层截留能力、截留降水的过程进行了研究。结果表明:枯草层因吸附大量尘土而致密紧实,截留水分的能力很强,截留的水量相当于5 mm的降雨量。在一次降雨过程中对降雨截留过程的观测发现:草坪枯草层留量随降水的变化曲线可划分为3个阶段,分别为快增期(截留量刚开始随降雨增加而迅速增加)、渐增期(截留量随降雨量增大的趋势减缓)和稳定期(随着降雨量的增大,截留量变化不大,基本稳定)。而在不同降雨强度下,较之强度大的降水,短暂而零星的小强度降水更能使水分充分浸湿枯草层,枯草层拦截的水分越多。
The interception of thatch has important effect on water use efficiency of grass. The ability of thatch of Zoysia sinica hance to intercept water was observed, and the dynamic process of rainfall interception is studied. The results showed that the thatch could intercept water greatly, the content of interception water was 5 ram. In the process of one rainfall the thatch can divided into three section： The quickly changing phase（The interception increased rapidly with the rainfall increasing）, the gradually changing phase（the increasing trend slowed down） ,and the stationary phase（the inter-ception keep stable with increasing rainfall）. Compared with strong precipitation, the thatch can intercepted much water under little intensity precipitation.
出处
《北方园艺》
CAS
北大核心
2008年第7期67-69,共3页
Northern Horticulture
基金
国家科技支撑计划资助项目(2006BAD16B09)
关键词
截留
枯草层
中华结缕草
Water interception
Thatch
Zoysia sinica hance
