生态学报2017，Vol.37Issue(1)：238-248,11.DOI:10.5846/stxb201608041609
红壤退化地森林恢复后土壤有机碳对土壤水库库容的影响
Effects of soil organic carbon on soil reservoir capacity after forest restoration in degraded red soil
摘要
Abstract
In a degraded red soil in subtropical China,the soil reservoir did not show a synchronized recovery with the rapid increase of biomass,resulting in frequent floods and droughts at the regional scale.The aim of this study was to determine the changes in soil organic carbon and soil reservoir capacity and their relationship following afforestation.Based on field investigations and lab assays,the differences of soil reservoir capacity in the 0-60 cm soil layer and the distribution characteristics of total organic carbon density and active organic carbon density were studied in three typical types of forest restoration in southern degraded red soil,i.e.Pinus massoniana and broad-leaved tree multiple layer forest(PB),Schima superba-Pinus massoniana mixed forest (SP),and broad-leaved mixed forest(BF).The correlation between soil reservoir capacity and soil organic carbon density was also analyzed using a canonical correlation analysis model.The results showed that with increased soil depth,all three forest restoration types exhibited growth trends in soil invalid capacity,while the storage capacity and the flood control capacity showed downward trends.However,the trend of flood control capacity was not obvious.Additionally,the storage capacity in the SP was higher than that in other forests.The total organic carbon density in the same layers was ranked as follows:PB ＞ SP ＞ BF.The active organic carbon density was largest in BF,suggesting that BF was propitious to the accumulation of active organic carbon.The soil organic carbon was positively correlated with soil reservoir capacity (P =0.01),and soil dissolved organic carbon played the dominant role for the increase of organic carbon levels.As a result,we could develop close-planting and stereoscopic planting appropriately to improve plant biomass and soil carbon density,and then interplant broad-leaved species with pioneer coniferous tree species such as Pinus massoniana at the early stage of forest restoration in degraded red soil.This strategy can increase the active soil organic carbon content and enhance soil reservoir capacity,which is conducive to the rapid recovery of the eroded soil and ecosystem.关键词
土壤水库/库容/土壤有机碳/典型相关分析/森林恢复/红壤Key words
soil reservoir/reservoir capacity/soil organic carbon/canonical correlation analysis/forest restoration/red soil引用本文复制引用
黄荣珍,朱丽琴,王赫,贾龙,刘勇,段洪浪,吴建平,刘文飞..红壤退化地森林恢复后土壤有机碳对土壤水库库容的影响[J].生态学报,2017,37(1):238-248,11.基金项目
国家自然科学基金资助项目(31160179) （31160179）
江西省自然科学基金资助项目(20151BAB204033) （20151BAB204033）
江西省水利厅科技资助项目(KT201546) （KT201546）
江西省高等学校“十二五”水土保持与荒漠化防治重点学科培育基金资助项目 （）
