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中国农学通报 ›› 2015, Vol. 31 ›› Issue (1): 17-23.doi: 10.11924/j.issn.1000-6850.2014-2200

所属专题: 资源与环境 农业生态

• 林学 园艺 园林 • 上一篇    下一篇

桂西北不同森林类型土壤生态化学计量特征

庞圣江,张 培,贾宏炎,杨保国,邓硕坤,冯昌林,王庆灵   

  1. (中国林业科学研究院热带林业实验中心,广西凭祥 532600)
  • 收稿日期:2014-08-13 修回日期:2015-01-19 接受日期:2014-10-15 出版日期:2015-03-18 发布日期:2015-03-18
  • 通讯作者: 冯昌林
  • 基金资助:

    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)。


Research on Soil Ecological Stoichiometry Under Different Forest Types in Northwest Guangxi

杨保国,邓硕坤, and   

  1. Pang Shengjiang, Zhang Pei, Jia Hongyan, Yang Baoguo, Deng Shuokun, Feng Changlin, Wang Qingling(Chinese Academy of Forestry Experimental Centre of Tropical Forest, Pingxiang Guangxi 532600)
  • Received:2014-08-13 Revised:2015-01-19 Accepted:2014-10-15 Online:2015-03-18 Published:2015-03-18

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: 花生, 花生, 农艺性状, 遗传多样性指数, 广义遗传率, 遗传进度

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.