澜沧江流域山地不同退耕还林模式水文效应研究

Study on hydrological effect of different modes of returning farmland to forest in mountainous area of Lancang River Basin

基于调查资料,以澜沧江流域普洱市6种主要退耕还林地为研究对象,选择具有代表性的样方,对不同退耕还林模式的凋落物层和土壤层的水文效应进行了初步研究。结果表明:6种退耕还林模式凋落物层的水文效应强弱顺序依次为思茅松+西南桦>西南桦>核桃>思茅松>桉树>茶树,土壤层的水文效应强弱顺序依次为思茅松+西南桦>西南桦>思茅松>核桃>桉树>茶树>耕地。综合凋落物层和土壤层总水文效应,思茅松+西南桦、西南桦和思茅松3种模式的水文效应较强。研究结果可为该地区退耕还林工程建设中的树种选择与搭配提供理论依据。

Based on investigation data collected at typical quadrats in Pu＇er City of Lancang River Basin, the hydrological effects of litter and soil layers in 6 different forest quadrats returned from farmland were studied preliminarily. The study results show that the downward order of hydrological effect for litter layers is Pinus kesiya ＋ Betula alnoides, Betula alnoides ＋ Walnut, Pinus kesiya, Eucalyptus, Tea tree; the downward order of hydrological effect for soil layers is Pinus kesiya ＋ Betula alnoides, Betula alnoides, Pinns kesiya, Walnut, Eucalyptus, Tea tree, arable land; for comprehensive effect of litter and soil layers, 3 foresting modes of Pinus kesiya ＋ Betula alnoides, Betula alnoides and Pinus kesiya have better hydrological effect. The study re- sults can provide theory basis for species selection and collocation of trees in returning farmland to forest in Lancang River Basin.