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桂西北不同森林类型土壤生态化学计量特征
引用本文:庞圣江,张 培,贾宏炎,杨保国,邓硕坤,冯昌林,王庆灵.桂西北不同森林类型土壤生态化学计量特征[J].中国农学通报,2015,31(1):17-23.
作者姓名:庞圣江  张 培  贾宏炎  杨保国  邓硕坤  冯昌林  王庆灵
作者单位:中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心,中国林业科学研究院热带林业实验中心
基金项目:基金项目: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)。
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。

关 键 词:森林生态系统  土壤养分  C/N  化学计量特征
收稿时间:2014/8/13 0:00:00
修稿时间:2015/1/19 0:00:00

Research on Soil Ecological Stoichiometry Under Different Forest Types in Northwest Guangxi
Pang Shengjiang;Zhang Pei;Jia Hongyan;Yang Baoguo;Deng Shuokun;Feng Changlin;Wang Qingling.Research on Soil Ecological Stoichiometry Under Different Forest Types in Northwest Guangxi[J].Chinese Agricultural Science Bulletin,2015,31(1):17-23.
Authors:Pang Shengjiang;Zhang Pei;Jia Hongyan;Yang Baoguo;Deng Shuokun;Feng Changlin;Wang Qingling
Institution:Pang Shengjiang;Zhang Pei;Jia Hongyan;Yang Baoguo;Deng Shuokun;Feng Changlin;Wang Qingling;Chinese Academy of Forestry Experimental Centre of Tropical Forest;
Abstract: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.
Keywords:forest ecosystem  soil nutrient  C/N  ecological stoichiometry
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