森林地表枯枝落叶层涵养水源作用的研究

采用室内模拟法 ,研究了 11个树种的不同L ,F层组合对地表径流、截持降雨量和水分蒸发强度的影响 .结果表明 :①在不同L ,F层组合涵养水源作用中 ,以厚LF最佳 ,其次为厚F ;②不同树种间以落叶松最佳 ,其次为油松、侧柏 ,阔叶树种较差 ;③枯枝落叶层持水后的水分蒸发过程 ,可用指数函数型表示 ;④中雨时枯枝落叶层的截持量较大

Effect of forest little on water source conservation.

In this experiment, simulated rainfall and evaporation methods were applied respectively to study the effect of forest litter on surface runoff, rainfall interception and water evaporation in different L and F composition under 11 different species. The results show that: ①for the role of water source conservation, the litter layer of L 2 cm+F 3 cm was the best, the second was the layer of F 3 cm; ② Among different tree species, Larix princips rupprechtii was the best, the second were Pinus tabulaeformis and Platycladus orientalis, the other eight broad leaf tree species were the third; ③The water evaporation course in the surface litter after moisture absorption can be illustrated with index function; ④The rainfall interception under middle rainfall amount were the largest.