【摘要】 对北京九龙山油松林、侧柏林、阴坡灌木林、阳坡灌木林的林冠层、枯落物层及土壤层对降雨的调蓄功能进行了研究，结果表明：四种不同林地的林冠截持率为２２％～３２％，大暴雨下的截持率为７％～１０％；枯落物层的有效调蓄为０．４６～２．４２ｍｍ；５０ｃｍ土层的快速、慢速和变化调蓄量分别为３５～４８ｍｍ；５４～４８ｍｍ，２８～５２ｍｍ；四种林地调蓄功能的顺序从大到小为油松林、阴坡灌木林、阳坡灌木林、侧柏林。更多还原

【Abstract】 The rainfall regulation and holding capacity of the forest canopy,litter andsoil in Jiulong Mountain were studied. The results showed that:mean annual rainfallinterception rate of forest canopy in 25-year-old artificial plantation of Pinus tabulaeformisCarr.and Platycladus orientalis(L.)Franco is about 22%～32%; the mean interception rateof heavy rain storm 7%～10%,The effective amoun of retention by litter 0.46～2.42 mm。The capacity of regulation and rainfall holding of soil horizon could be classified into 3categories : fast,slow and changed regulation。Among them,the fast regulation amount isbetween 35～48 mm,the slow regulation amount 54～48 mm,and the changed regulationamount 28～52 mm。The sum of the three is called as the effective amount of regulation andholding,which is between l03～14l mm,It is clear that the soil horizon posseses the greatestcapacity。Although the annual amount of rainfall regulation of the forest canopy is ratherlarge,its regulation amount to heavy rainstorm accounts for only l0%of the total。更多还原