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本文采用称重法研究了黄土丘陵区沙打旺草地对降雨的截留作用。结果表明：截留量（Ｐ＿ｊ）与草地盖度（Ｃ）、降雨强度（Ｉ）及降雨时间（ｔ）之间存在Ｐ＿ｊ＝－０．０１８６＋０．０６０１ＣＩｔ－０．００６１２Ｃ￣２Ｉ￣２ｔ￣２的关系；沙打旺草地最大截留率为２９．７％；同时分析了盖度、雨强、降雨时间对草地截留的影响。
In this paper, the gravimetric method was used to study the interception of rainfall on Shamianwang meadow in loess hilly region. The results showed that the relationship between P_j and grass cover (C), rainfall intensity (I) and rainfall time ; The maximum retention rate of Shatianwang grassland was 29.7%; and the influence of coverage, rainfall intensity and rainfall time on grassland interception was also analyzed.