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通过对黄土丘陵区中龄山杨次生林的凋落物及其分解过程,以及蓄积量随时间变化的分析,研究了枯枝落叶层的持水和截留作用及其蓄水减沙效益。认为枯枝落叶层的水文作用,最终体现在其水土保持和水源涵养效能上,为综合评价该地区广泛分布的山杨次生林生态功能,提供了科学依据。
By analyzing litter and its decomposition process and the changes of its stock volume with time in the secondary forests of Populus simonii in the hilly Loess Plateau, the effects of water holding and interception on water retention and sediment reduction in litter layer were studied. It is concluded that the hydrological function of litter layer is finally reflected in its soil and water conservation and water conservation efficiency, which provides a scientific basis for the comprehensive evaluation of the ecological functions of the Poplar secondary forest widely distributed in this area.