油松林枯落物层防止溅蚀的研究  

Study on prevention of Splash erosion by litter in chinese pine woodland

作　　者：韩冰[1] 吴钦孝[1] 刘向东[1] 江有科 赵鸿雁[1] 

机构地区：[1]中国科学院水利部,西北水土保持研究所

出　　处：《水土保持研究》1994年第3期14-18,共5页Research of Soil and Water Conservation

摘　　要：２８年生油松人工林内天然降雨的溅蚀试验结果表明，当Ｉ３０为０．０７ｍｍ／ｍｉｎ或Ｐ０为３．５７ｍｍ时，无枯落物层覆盖的林地发生溅蚀，当Ｉ３０为０．２５ｍｍ／ｍｉｎ或Ｐｏ为４５．８ｍｍ时，具１ｃｍ枯落物层的林地不发生溅蚀。从溅蚀月动态看出，７、８月份占全年溅蚀量的７０％以上。在同一土壤和同一坡度条件下，Ｉ３０、Ｐ０、Ｈ１是溅蚀发生的主要因素，且溅蚀量与其呈二次多项式回归关系。但当枯落物层具有一定厚度时溅蚀与其它因素无关。具有１ｃｍ厚的枯落物层即可防止土壤溅蚀量的７９．７％。The results of the experiment in prevention of splash erosion under the condition of natural rainfall in the woodland of 28-year-old chinese pine have shown that when I30=0.07 mm,min-1 or P0=3.57mm the splash erosion in the woodland with out litter occured;and when I30=0.25mm.min-1or P0=45.8mm itdid not occured in the woodland with litter of 1cm.Splash erosion monthly dynamic indicated that the splash erosion in July and August amounts to more than 70% of the total splash erosion.Under the conditions of same soil and slope,I30、P0and H1are the major factors affecting the splash erosion,and there is a multinomial regression equation among splash erosion and I30, P0,H1e.But when the litter layer reached a certain thickness,splash erosion has nothing to do with the other factors.When the litter layer accumulatedto a depth of 1cm,it can prevent soil splash erosion of 79.7%.

关 键 词：枯落物层 溅蚀 土壤保持 

分 类 号：F326.2[经济管理—产业经济]