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分析研究区洪雅县1981—2000年气象资料得知,洪雅县柳江镇5—9月的降雨量占年降雨量的79.5%,≥25mm的侵蚀性降雨主要集中在4—11月的14 d中。生态定位观测的结果表明:不同类型植被恢复5年后按侵蚀性降雨量的大小排序依次为桦木+牛鞭草>杂交竹+牛鞭草>农耕地>苦竹+牛鞭草,按侵蚀性降雨次数多少排序依次为桦木+牛鞭草>农耕地>杂交竹+牛鞭草>苦竹+牛鞭草。苦竹+牛鞭草植被对降雨的调节能力较强;桦木+牛鞭草植被因桦木生长的原因对降雨的调节能力尚不及农耕地,该类植被有待进一步培育。
Analysis of Hongya County from 1981 to 2000 meteorological data shows that Hongya County Liujiang Town from May to September rainfall accounted for 79.5% of annual rainfall, ≥ 25mm of erosive rainfall mainly concentrated in 4-11 months of 14 d. According to the results of ecological location observation, the results showed that the order of erosive rainfall after the restoration of different types of vegetation was birch + verbena> hybrid bamboo + verbena> agricultural land> bitter bamboo and verbena, followed by erosive rainfall The order is birch + verbena> farmland> hybrid bamboo + verbena> bitter bamboo + verbena. Pleurotus ostreatus and Verbena had stronger ability to regulate rainfall. The birch and Verbena vegetation had less ability to regulate rainfall than that of cultivated land due to the growth of birch, and the vegetation needed to be further cultivated.