浙江省临安市山核桃产区林地土壤有机碳分布特征

为阐明我国特色干果山核桃（Carya cathayensis）林地土壤有机碳的分布特征,于2008年7—8月采用1km×1km网格在浙江省临安市域内设置山核桃林样地306个,采集0～30cm土壤样品,分析其有机碳和其他养分含量及其空间分布特征.结果表明,不同区域山核桃林地表层土壤有机碳质量分数、碳密度存在较大的差异,平均值分别为18.87g/kg和60.92t/hm2,明显低于相同区域的常绿次生阔叶林.多元协方差分析表明,海拔、乡镇和母岩类型等3因素是影响临安市山核桃林地土壤有机碳含量的主要因素.大峡谷镇山核桃林地土壤有机碳平均含量最高,显著高于河桥、马啸、湍口、清凉峰等乡镇;随着海拔高度的升...

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Bibliographic Details
Published in浙江大学学报（农业与生命科学版） Vol. 39; no. 4; pp. 413 - 420
Main Author 吴家森 张金池 黄坚钦 童志鹏 叶晶 顾光同
Format Journal Article
LanguageChinese
Published 南京林业大学森林资源与环境学院,南京210037 2013
浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,浙江临安311300%南京林业大学森林资源与环境学院,南京,210037%浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,浙江临安,311300%临安市林业科技推广总站,浙江临安,311300%浙江农林大学理学院,浙江临安,311300
Subjects
土壤有机碳
山核桃
碳密度
空间分布
carbon density
碳密度
山核桃
土壤有机碳
soil organic carbon
空间分布
spatial distribution
Carya cathayensis
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ISSN1008-9209
DOI10.3785/j.issn.1008-9209.2012.09.201

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Summary:为阐明我国特色干果山核桃（Carya cathayensis）林地土壤有机碳的分布特征,于2008年7—8月采用1km×1km网格在浙江省临安市域内设置山核桃林样地306个,采集0～30cm土壤样品,分析其有机碳和其他养分含量及其空间分布特征.结果表明,不同区域山核桃林地表层土壤有机碳质量分数、碳密度存在较大的差异,平均值分别为18.87g/kg和60.92t/hm2,明显低于相同区域的常绿次生阔叶林.多元协方差分析表明,海拔、乡镇和母岩类型等3因素是影响临安市山核桃林地土壤有机碳含量的主要因素.大峡谷镇山核桃林地土壤有机碳平均含量最高,显著高于河桥、马啸、湍口、清凉峰等乡镇;随着海拔高度的升高,山核桃林地土壤有机碳含量增加,海拔在800m以上的山核桃林地土壤有机碳含量显著高于600m以下的山核桃林地土壤;花岗岩发育的山核桃林地土壤有机碳含量显著高于砂页岩发育的土壤.临安市山核桃林主要分布在西部山区,面积29 047.1hm2,0～30cm土壤有机碳总贮量为1 828.92×103t.土壤有机碳含量与pH、容重呈极显著负相关（R2=0.187 1～0.207 6,n=306,P〈0.01）,而与碱解氮、有效磷、速效钾和有效硫含量呈极显著正相关（R2=0.193 1～0.708 7,n=306,P〈0.01）.
Bibliography:33-1247/S
Carya cathayensis; soil organic carbon; carbon density; spatial distribution
Hickory（Carya cathayensis）is a plant famous for production of edible nuts and oil in southeast China,which is mainly distributed in Tianmu Mountain at the junction of Zhejiang and Anhui Provinces.There is a long cultivation and utilization history of hickory,and continued development and adaption of advanced management practices since 1980s,such as high fertilizer addition and effectively artificial weeding techniques,etc.However,this intensive management for highly economic profit of nut production may lead to soil degradation,and the influence of such intensive management measures on soil organic carbon（SOC） under hickory forest has not yet been reported.So the objectives of this study were to investigate the effects of intensive management on SOC content and distribution of hickory forest,which could provide useful information for sustainable management of hickory forests.The experiment sites located in Lin ’ an City（118°5
ISSN:1008-9209
DOI:10.3785/j.issn.1008-9209.2012.09.201