毛竹杉木混交林水源涵养功能研究

Studies on the Water Conservation Functions of Phyllostachys pubescens and Cunninghamia lanceolata Mixed Forests

毛竹杉木混交林水源涵养能力和经济效益分析结果表明 :杉木密度为 135 0株·hm-2 的混交林分涵养水源能力最强 ,林冠层持水量比杉木纯林多 0 5 4 5t·hm-2 ,比毛竹纯林多 3 0 4 9t·hm-2 ;地上部分总持水量达 2 5 4 2 4t·hm-2 ,分别比杉木纯林、毛竹纯林增加 3 14 3t·hm-2 、3 30 9t·hm-2 ;0～ 4 0cm土壤层贮水量达 6 11 2t·hm-2 ,比杉木纯林、毛竹纯林和其它混交林都大 ;初渗值达 6 0 86mm·min-1,稳渗值达 2 4 32mm·min-1,分别是杉木纯林 2 8倍、2 3倍 ,是毛竹纯林的 2 5倍、1 6倍 ;年水源涵养量达 14 4 15t·hm-2 ,比荒山大 2 376t·hm-2 ,比杉木纯林大 74 0t·hm-2 。

The analysis results show that the ability of conserving water of mixed stands with the Cunninghamia lanceolata density of 1350 trees/hm 2 is strongest.The canopy layer water holding capacity is 0.545 tons/hm 2 more than that of pure C.lanceolata forests,3.049 tons/hm 2 more than that of pure P.pubescens forests.The total water holding capacity of above ground portion is 25.424 tons/hm 2,3 143 tons/hm 2 more than that of pure C.lanceolata forests and 3.309 tons/hm 2 more than that of pure P.pubesc...