沐川天然林与人工水杉林保水功能比较

Comparison of Water Conserving Function for Litter of Natural Forest and Artificial Forest in Muchuan County

摘要: 通过对四川沐川县天然林、人工林(水杉林)枯落物蓄积量调查分析和持水特性的研究结果表明:枯落物蓄积量为天然林 > 人工林(25.7 t·hm^-2 > 18.1 t·hm^-2),最大持水量为天然林 > 人工林(75.0 t·hm^-2 > 47.0 t·hm^-2),最大持水率为天然林 > 人工林,各时段吸水量、吸水速率表现为天然林 > 人工林,有效拦蓄量表现为天然林 > 人工林(28.6 t·hm^-2 > 17.0 t·hm^-2)。总体分析可以看出,天然林落物层保水功能相对要比人工林好。

Abstract: Investigations and analysis were made of the reserves of litter and its water retention characteristics in natural forest and artificial forest in Muchuan county, Sichuan. The results showed that litter reserves were natural forest > artificial forest(25.7 t·hm^-2 > 18.1 t·hm^-2); Maximum water retention capacity was natural forest > artificial forest(75.0 t·hm^-2 > 47.0 t·hm^-2); Maximum water retention ratio,water absorption and water absorption speed were natural forest > artificial forest; Effective retaining content was natural forest > artificial forest(28.6 t·hm^-2 > 17.0 t·hm^-2). In general, water conserving function of natural forest was better than that of artificial pinust abulaeformis forest.