不同宽度廊道皆伐对油松人工林土壤物理性质及枯落物储量、容水量的影响

Effects of Corridor Clear-cutting with Different Widths on Soil Physical Properties,Litter Storage and Water Capacity of Pinus tabulaeformis Plantation

为了确定适宜的廊道皆伐宽度,充分发挥林分密度调控措施的积极作用,对4、6和8 m等3种宽度廊道皆伐改造后的油松人工林的土壤容重、含水量、毛管孔隙度、非毛管孔隙度及枯落物储量、容水率、容水量等进行了调查研究,结果表明:随着廊道宽度的增加,林地土壤容重及枯落物厚度、现存量降低,枯落物容水系数及阴坡林分土壤含水量、毛管孔隙度、非毛管孔隙度增大;阳坡6 m带宽廊道皆伐林分各项指标均优于8 m和4 m带宽林分。综合考虑,阴坡8 m、阳坡6 m是油松人工林廊道皆伐的适宜宽度。

In order to determine the suitable corridor clear-cutting width,give full play to the positive role of stand density control measures,the soil bulk density,water content,capillary porosity and non-capillary porosity and litter reserves,water rate,water capacity and so on of 4 m,6 m,8 m bandwidths corridor clear cutting modified Pinus tabulaeformis plantation were studied.Result shows that:With the increase of corridor width,forest soil bulk density,litter thickness,current stock decrease,litter water capacity coefficient,soil moisture content,capillary porosity&non-capillary porosity of shady slope stand increase,and various indexes of 6 m bandwidth corridor clear-cutting stand on sunny slope are optimal than that of 8 m and 4 m bandwidths stand.Comprehensive consideration showed that the appropriate widths for corridor clear cutting of Pinus tabulaeformis plantation are 8 m bandwidth for shady slope and 6 m bandwidth for sunny slope respectively.