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喀斯特峰丛洼地退耕还林还草的土壤生态效应
引用本文:宋同清,彭晚霞,曾馥平,王克林,刘璐,鹿士杨,杜虎.喀斯特峰丛洼地退耕还林还草的土壤生态效应[J].土壤学报,2011,48(6):1219-1226.
作者姓名:宋同清  彭晚霞  曾馥平  王克林  刘璐  鹿士杨  杜虎
作者单位:中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙410125;中国科学院环江喀斯特生态系统观测研究站,广西环江547100
基金项目:中国科学院知识创新工程(KZCX—2—YW—436)、国家自然科学基金项目(Nos. 30970508、31000224、31070425和U1033004)和国家科技支撑计划(2009 BADC6B008)
摘    要:石漠化生态重建的关键是恢复植被,本质是提高土地生产力。本文以典型喀斯特峰丛洼地的坡耕地为对照,对退耕种植任豆、香椿、板栗、柑橘、任豆+桂牧1号、桂牧1号和撂荒7种主要模式固定标准地的21个土壤指标进行调查分析,探讨了退耕还林还草的土壤综合生态效应,筛选了优化模式。结果表明,与同纬度地区的红壤相比,喀斯特峰丛洼地的土壤质量除全钾和速效磷含量稍低外均较高;退耕还林还草显著或极显著提高了大部分土壤主要养分、水分和矿质养分含量,降低了SiO2含量,除任豆模式外均恢复到了石漠化以下水平,同时提高了土壤微生物种群数量、BC、BC/SOM和BC/TN,但BN和BN/TN略有降低;聚类分析直观地将坡耕地和7种模式分为土壤显著改良型、改良型、缓慢改良型和改良迟滞型4种类型,其中香椿和板栗的土壤生态效应最好。

关 键 词:退耕还林还草  土壤理化性状  土壤微生物  优化模式  喀斯特峰丛洼地
收稿时间:5/27/2010 9:34:15 PM
修稿时间:2010/12/15 0:00:00

Soil ecological effects of converting cropland to forest and grassland in depressions between karst hills
songtongqing,pengwanxi,zengfuping,wangkelin,liulu,lushiyang and duhu.Soil ecological effects of converting cropland to forest and grassland in depressions between karst hills[J].Acta Pedologica Sinica,2011,48(6):1219-1226.
Authors:songtongqing  pengwanxi  zengfuping  wangkelin  liulu  lushiyang and duhu
Institution:Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences,Institute of Subtropical Agriculture, Chinese Academy of Sciences
Abstract:The key to ecological restoration of rocky desertification is to recover vegetation,of which the nature is to improve soil productivity.With a tract of farmland on the slope of depression in between typical karst hills as control,integrated ecological effect of the practice of Grain for Green was analyzed by determining 21 soil indexes of seven models of Grain for Green,i.e.converting farmland to land of Zenia insignis,Toona sinensis,Castanea mollissima,Citrus reticulata,Zenia insignis+Guimu No.1 Forage,Gui...
Keywords:Grain for green  Soil physicochemical properties  Soil microorganisms  Optimal model  Karst depression
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