【摘要】 以河北雾灵山自然保护区内4种不同密度(881,940,1 252,1 400株/hm2)的油松人工纯林为研究对象,对其枯落物层和土壤层水文效应进行初步研究。结果表明:枯落物总储量变化范围为29.11~47.14t/hm2,且在一定林分密度内,随密度增加枯落物储量增加,最大持水量的变化范围为63.79~108.18t/hm2,有效拦蓄能力在43.25~81.44t/hm2之间,以1 252株/hm2有效拦蓄能力最强;枯落物持水量与浸泡时间呈明显对数关系(R>0.90),枯落物吸水速率与浸泡时间呈明显幂函数关系(R>0.99);土壤容重均值变化范围为0.88~1.26g/cm3,总孔隙度的变化范围为46.00%~62.27%;土壤层有效持水能力以密度为1 400株/hm2时最强,有效持水量为66.17t/hm2;土壤入渗速率与入渗时间呈明显幂函数关系(R>0.84)。综合分析可知,密度为1 400株/hm2的油松林水源涵养能力最强。更多还原

【Abstract】 A preliminary study of the hydrological effects of forest litters and soil was carried out in 4densities(881,940,1 252,1 400plants per hectare)Pinus tabulaeformis plantation in Wuling Mountain of Hebei.The results showed that:The litter total accumulation was 29.11~47.14t/hm2,and in a certain stand density,litter accumulation increased with the increase of stand density,maximum water-holding volume ranged from 63.79t/hm2 to 108.18t/hm2,effective retaining capacity was 43.25~81.44t/hm2,and the strongest effective retaining capacity stand was 1 252plants per hectare.Water holding capacity of litter was logarithmic relationship with immersion time(R>0.90),and water absorption rate showed a power function with the immersion time(R>0.99).Soil bulk density was 0.88~1.26g/cm3,the total porosity was46%~62.27%,the stand of 1 400plants per hectare had the strongest soil available water holding,which was 66.17t/hm2.Soil infiltration rate and infiltration time were obvious power function relationship(R>0.84).The comprehensive analysis showed that,when there were 1 400plants per hectare,the Pinus tabulaeformis forest had the strongest water capacity.更多还原