摘要
为了解毛竹林土壤活性有机碳库的动态特征,探讨毛竹林土壤有机碳稳定机制,对江西安福林区毛竹纯林、竹阔混交林、竹杉混交林3种不同类型毛竹林地的土壤热水浸提态有机碳(HWcC)含量及其季节变化和剖面分布进行研究,同时以中亚热带阔叶林和杉木纯林为对照。结果表明:不同类型毛竹林土壤HWcC含量差异较大,0～60cm土壤HWcC含量平均值大小排序为:竹阔混交林(1047.14mg/kg)>阔叶林(952.49mg/kg)>毛竹纯林(912.39mg/kg)>竹杉混交林(879.22mg/kg)>杉木林(851.63mg/kg)。各林分类型土壤HWcC含量具有明显的季节差异,冬季均极显著高于其他季节。各林分类型土壤HWcC含量平均值随着土层加深而降低,各土层间均达到显著差异,表层积聚作用明显。毛竹林类型土壤HWcC占TOC比率在7.16%～7.38%,高于阔叶林的6.79%,低于杉木林的8.46%。竹阔和竹杉混交林的土壤HWcC与TOC相关系数分别为0.88、0.92,均达到极显著水平。
In order to study the dynamic characteristics of soil active organic carbon pool in Moso bamboo forest,and explore the stable mechanism of soil organic carbon of Moso bamboo forest,5 kinds of stand type（pure Moso bamboo forest,mixed forest of Moso bamboo and broad-leaved tree,mixed forest of Moso bamboo and Chinese fir,broadleaf forest,Chinese fir forest） had been chosen in Anfu,Jiangxi Province.The seasonal variation and profile distribution of soil hot-water extractable carbon（HWcC） was exposed,and the relationship between soil HWcC and soil total organic carbon（TOC） was analyzed.The results showed that there was great difference in soil HWcC under different types of Moso bamboo forest.The order of soil HWcC in 0-60cm soil layer was mixed forest of Moso bamboo and broad-leaved tree（1047.14mg/kg）broadleaf forest（952.49mg/kg）pure Moso bamboo forest（912.39mg/kg） mixed forest of Moso bamboo and Chinese fir（879.22mg/kg） Chinese fir forest（851.63mg/kg）.The seasonal variation of soil HWcC had significant,and winter was significantly higher than other seasons.There had significant among different soil layers.The average content of soil HWcC decreased with increasing soil depth,and the surface accumulation effect was obviously.The proportion between the soil HWcC and TOC from 7.16% to 7.38%,was higher than broadleaf forest（6.79%） and lower than Chinese fir forest（8.46%）.The relationship of soil HWcC and TOC had significant under mixed forest of Moso bamboo and broad-leaved tree and Chinese fir,and the correlation coefficients were 0.88 and 0.92,respectively.
出处
《中国农学通报》
CSCD
2012年第34期70-74,共5页
Chinese Agricultural Science Bulletin
基金
国际竹藤网络中心基本科研业务费专项资金项目"江西毛竹林土壤有机碳动态特征的研究"(1632009016)
江西省主要学科和学术带头人培养计划项目"毛竹林土壤有机碳稳定机制及其周转研究"(20113BCB22003)
江西省自然科学基金"毛竹林土壤有机碳库特征及其稳定性研究"(2009GZN0042)
关键词
毛竹
不同类型
热水浸提态有机碳
总有机碳
Phyllostachys edulis
different types
hot-water extractable carbon
total organic carbon
