| 李 鑫，陈先刚，王艳霞，姜 磊，陆 梅.退耕还林杉木林土壤有机碳含量
与理化性质敏感性分析[J].广东农业科学,2015,42(18):49-55 |
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退耕还林杉木林土壤有机碳含量
与理化性质敏感性分析 |
| Sensitivity analysis of variables correlated to soilorganic carbon in Chinese fir plantationunder the Grain for Green Program |
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| DOI： |
| 中文关键词: 杉木林 土壤有机碳 理化性质 敏感性 |
| 英文关键词: Chinese fir plantation soil organic carbon soil-correlated variables sensitivity analysis |
| 基金项目:国家自然科学基金（41263008） |
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| 摘要点击次数: 1228 |
| 全文下载次数: 432 |
| 中文摘要: |
| 为揭示退耕还林地土壤有机碳的变化机制，把握主要驱动因子，以贵州省兴义市三江口镇退耕还
林杉木林为研究对象，采取野外调查采样与实验室分析测试相结合的方法，利用通径分析和敏感性分析进行
研究。结果表明：土壤理化性质以不同方式和强度影响着土壤有机碳含量，土壤pH 值和碱解氮量主要通过直
接作用产生影响，土壤容重、林龄和林下凋落物主要通过间接作用产生影响；土壤含水率直接和间接作用都相
对较强；细根量、有效磷量、速效钾量和总孔隙度的影响力较低；各因子对土壤有机碳含量的敏感度依次为：
碱解氮量> 土壤pH 值> 林龄> 林下凋落物量> 土壤含水率> 速效钾量> 细根量> 有效磷量> 土壤容重> 总
孔隙度。 |
| 英文摘要: |
| In order to reveal the change mechanism and main driving factors of the soil organic carbon in Chinese
fir plantation under the Grain for Green Program，Sanjiangkou Town，Xingyi City in Guizhou Province was chosen as
area for field investigation and soil sampling，and the test data characterized physical and chemical properties of soil
samples were processed by path analysis method and sensitivity analysis method，respectively. The results showed that
soil organic carbon content was affected by main driving factors in different ways and strength：soil pH value and alkalihydrolysable
with strongly direct impacts；soil density and forest floor litter with strongly indirect impacts；soil moisture
strongly influenced directly and indirectly；root biomass，available phosphorus content，readily available potassium and
total porosity had the least effect on soil organic carbon content. In addition，the sensitivity order of those driving factors
to soil organic carbon content was as follows：alkali-hydrolyzable nitrogen content > soil pH value > age of trees > forest
floor litter >soil moisture >readily available potassium >root biomass > available phosphorus content >soil density >total
porosity. |
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