连栽对桉树人工林土壤有机碳含量影响的Meta分析

Effects of Continuous Cropping on Soil Organic Carbon Content of Eucalyptus Plantation Soils Based on Meta-analysis

为系统评价连栽对桉树人工林土壤有机碳含量的影响,检索了CNKI、万方数据库,搜集相关研究,以土壤有机碳含量的加权均数差为效应量,对纳入研究的文献进行Meta分析。结果表明:随着连栽代次的增加,桉树人工林土壤有机碳含量总体上呈逐渐减少的趋势;随着土层深度的增加,桉树人工林土壤有机碳含量与对照林分的差异逐渐减小,多代连栽对桉树土壤有机碳含量的影响主要体现在表土层。今后在桉树人工林营林实践中应注重对一代、二代和三代桉树人工林的表层土壤的有机质补充,以维持桉树人工林地力和桉树产业健康可持续发展。

In order to systematically evaluate the effects of continuous cropping on soil organic carbon content of Eucalyptus plantation, CNKI and WANFANG databases were searched to identify publications on these subjects and collect published data. Weighted Mean Difference(WMD) of the soil organic carbon content was used as the effect size, and meta-analysis was performed. The results showed that with the increasing number of plantation rotations, the contents of soil organic carbon gradually decreased. However,with increasing soil depth the differences in soil organic carbon content between Eucalyptus plantations and control stands gradually decreased;thus the effects of continuous cropping on soil organic carbon content manifested mainly in soil surface layers. Based on findings from this study, it is recommended that future plantation management pay more attention to organic matter amendments for plantation soils in order to maintain soil fertility and ensure sustainable development of Eucalyptus plantations.