黄土残塬沟壑区利用阔叶树种枯落叶改善针叶林地土壤酶活性的效应研究  

Effects of Utilizing Litter of Broadleaved Tree Species to Improve Soil Enzyme Activities of Needleleaved Forests in Gullied Loess Plateau

作　　者：王林[1] 刘增文[2,3] 郭冠春[3] 周丽萍[3] 贺敏[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]农业部黄土高原农业资源与环境修复重点开放实验室,陕西杨陵712100 [3]西北农林科技大学资源环境学院,陕西杨陵712100

出　　处：《西北林学院学报》2010年第4期1-6,10,共7页Journal of Northwest Forestry University

基　　金：西北农林科技大学人才计划项目(2005);国家自然科学基金项目(30471376)

摘　　要：通过对针叶林地土壤与不同阔叶树种枯落叶进行室内混合培养和测定,研究了黄土残塬沟壑区不同阔叶树种枯落叶分解对针叶林地土壤酶活性的改善效应,以期达到快速确定引入混交树种目的,并且为防止针叶纯林林地所出现的土壤极化等系列问题提供相应的理论依据。研究结果表明:(1)侧柏林地土壤混合5种阔叶树种枯落叶培养后,酶活性综合指数较对照均有提高,引入树种适宜度为刺槐>柠条>辽东栎>小叶杨>沙棘。(2)油松林地土壤,混合小叶杨、柠条和沙棘枯落叶培养后,土壤酶活性综合指数较对照均有提高,刺槐和辽东栎枯落叶培养后则反之,故不宜刺槐和辽东栎与油松混交,引入树种适宜度依次为小叶杨>柠条>沙棘。The improvement effects of litter decomposition of broad-leaf species on the soil of coniferous forests were investigated by indoor culture and measurement, to determine the introduction of tree species to coniferous forest, and to solve the problems such as soil polarization. The result showed （1） the comprehensive index of soil enzyme activity was improved after the soil mixture of Platycladus orientalis woodland and litter decomposition of five kinds of broad-leaved species forest land were cultured, the compatibility for the introduction was in the order of Robinia pseudoacia 〉 Caragana microphylla 〉 Quercus liaotungensis〉Populus sirnonii〉 Hippophae rharnnoides; （2） the similar situation occurred after the soil from Pinus tabulaeforrnis woodland were cultured with litter decompositions of P. sirnonii, C. microphylla,and H. rharnnoides, i. e. , the comprehensive index of soil enzyme activity was improved, and the compatibility for introduction was in the order of P. sirnonii 〉 C. microphylla 〉H. rhamnoides, the index was deteriorated after the soil of P. tabulaeformis forest land were cultured with the litter decompositions of R. pseudoacia and Q. liaotungensis, indicating that these two are not suitable to introduce to P. tabulae formis forest.

关 键 词：针叶林 枯落叶 土壤极化 土壤酶活性 

分 类 号：S718.54[农业科学—林学]