文献类型：期刊文献

中文题名：桂西北不同森林类型土壤生态化学计量特征

英文题名：Research on Soil Ecological Stoichiometry Under Different Forest Types in Northwest Guangxi

作者：庞圣江[1] 张培[1] 贾宏炎[1] 杨保国[1] 邓硕坤[1] 冯昌林[1] 王庆灵[1]

第一作者：庞圣江

机构：[1]中国林业科学研究院热带林业实验中心

年份：2015

卷号：31

期号：1

起止页码：17-23

中文期刊名：中国农学通报

外文期刊名：Chinese Agricultural Science Bulletin

收录：CSTPCD

基金：国家科技部社会公益研究专项"广西雅长兰科种质基因库营建及可持续利用"(2005DIB6J144)

语种：中文

中文关键词：森林生态系统;土壤养分;C/N;化学计量特征

外文关键词：forest ecosystem; soil nutrient; C/N; ecological stoichiometry

分类号：S714.5

摘要：以广西雅长林区3种森林类型(针阔混交林、常绿-叶阔叶混交林、常绿阔叶林)的土壤作为研究对象,对土壤C、N、P、K等养分含量及其比例的影响状况等进行研究,探讨土壤养分变化和化学计量特征。研究结果表明:随着森林的演替,3种森林类型植被下土壤C、N、P和K含量中,N素(全N和有效N)含量不断积累;有机C、P和K含量则表现出一致性的先增加后减少趋势,即演替初期低-中期高-后期低的变化规律;C/N呈逐渐降低趋势,均值大小依次为:针阔混交林>常绿-落叶阔叶混交林>常绿阔叶林;而C/P、C/K、N/P、N/K和P/K则均呈升高趋势,均值大小依次为:常绿阔叶林>常绿-落叶阔叶混交林>针阔混交林。相关性分析表明,土壤有机C与N/P和N/K都呈极显著的正相关关系;全N与C/P呈极显著的正相关关系,与C/K具有显著正相关关系;全P与C/K、N/K呈极显著的正相关关系。
Soil of 3 different forest types in Yachang forest region, Guangxi（mixed conifer and broadleaved forest, evergreen-deciduous broadleaf-mixed forest, broadleaf forest） as the research object, the content and ecological stoichiometry of C, N, P, K in soil were analyzed. As the forest succession, the content of C, N, P, K in soil under 3 different forest types showed that the content of N in soil accumulated all through the forest succession while the content of C, P, K in soil firstly increased and then decreased, the carbon-nitrogen ratio had a decreasing tendency while C/P, C/K, N/P, N/K and P/K took on an increasing tendency. Correlation analyses revealed that the soil organic C had highly significant correlation with N/P and N/K, the total N had highly significant correlation with C/P while had significant correlation with C/K, the total P had highly significant correlation with C/K and N/K.