杉木(19年生)毛竹混交林水源涵养能力研究

Water holding Capacity of Mixed Forest in Cunninghamia lanceolata and Phyllostachys pubescens.

对福建省尤溪县包溪林业采育场１９７４年营造的杉木毛竹混交林水源涵养能力和经济效益进行了研究。结果表明：杉木密度为１３５０株·ｈｍ－２的混交林涵养水源能力最强，林冠层持水量比杉木纯林多０．５４５ｔ·ｈｍ－２，比毛竹纯林多３．０４９ｔ·ｈｍ－２；地上部分总持水量（２５．４２４ｔ·ｈｍ－２）分别比杉木纯林、毛竹纯林增加３．１４３ｔ·ｈｍ－２，３．３０９ｔ·ｈｍ－２；土壤（０～４０ｃｍ层）贮水量达６１１．２ｔ·ｈｍ－２，比杉木纯林、毛竹纯林和其他混交林都大；初渗值达６０．８６ｍｍ·ｍｉｎ－１，稳渗值达２４．３２ｍｍ·ｍｉｎ－１，分别是杉木纯林２．８倍和２．３倍，毛竹纯林的２．５倍和１．６倍。

The research was made at Baoxi Forest Farm of Youxi County,Fujian Province.The mixed forest with Chinese fir(Cunninghamia lanceolata)and moso bamboo(Phyllostachys pubescens)was established in 1974.The results showed that mixed forest with the density of 1 350 plants per hectare for Chinese fir had the strongest function of water conservation.The water holding content in canopy of mixed forest was 0 545 t·hm -2 more than pure Chinese fir,and was 3 143 t·hm -2 more than pure moso.Total water holding above ground part reached to 25 424 t·hm -2 ,3 143 t·hm -2 and 3 309 t·hm -2 more than pure Chinese fir and pure moso respectively.Total water storing of soil at 0～40 cm was 611 2 t·hm -2 ,larger than pure Chinese fir, pure moso and other mixed forests.Initial infiltration and stable infiltration capacities were 60 86 mm·min -1 and 24 32 mm·min -1 ,which were 2 8 times and 2 3 times for pure Chinese fir,and 2 5 times and 1 6 times for pure moso stand,respectively.