外源性有机碳对红砂岩侵蚀劣地植被恢复及土壤改良的影响研究  

Effects of exogenous organic carbon on vegetation restoration and soil improvement in red sandstone eroded degraded land

作　　者：尚敏敏 汤崇军 张杰 奚同行 胡优 SHANG Minmin;TANG Chongjun;ZHANG Jie;XI Tonghang;HU You(Jiangxi Academy of Water Science and Engineering,Nanchang Jiangxi,330029,China;Jiangxi Provincial Technology Innovation Center for Ecological Water Engineering in Poyang Lake Basin,Nanchang Jiangxi,330029,China;Jiangxi Key Laboratory of Watershed Soil and Water Conservation,Nanchang Jiangxi,330029,China;College of Land and Environment,Jiangxi Agricultural University,Nanchang Jiangxi,330045,China)

机构地区：[1]江西省水利科学院,江西南昌330029 [2]江西省鄱阳湖流域生态水利技术创新中心,江西南昌330029 [3]流域水土保持江西省重点实验室,江西南昌330029 [4]江西农业大学国土资源与环境学院,江西南昌330045

出　　处：《江西水利科技》2025年第2期121-130,共10页Jiangxi Hydraulic Science & Technology

基　　金：江西省“科技+水利”联合计划项目(2022KSG01010、2023KSG01004);江西省自然科学基金项目(20224BAB214078);江西水利科技项目(202425YBKT08)。

摘　　要：红砂岩具有物理风化强烈、遇水软化及崩解碎裂等特殊地质力学性质,导致其易侵蚀难恢复,易形成侵蚀劣地。为了更好地解决红砂岩侵蚀劣地治理实践薄弱等问题,本研究通过盆栽定位试验,分析添加不同外源性有机碳后土壤理化性质和植物生长的变化特征,筛选出综合改良效果最优的外源性有机碳,比较其添加方式、添加浓度等对土壤的改良差异,提出有效改善红砂岩侵蚀劣地的外源性有机碳恢复措施。结果表明:基于常见的7种外源性有机碳添加对比,筛选出“生物炭”作为综合改良效果较好的外源性有机碳;对比生物炭不同添加方式和浓度对红砂岩侵蚀劣地土壤的改良效果及成本,将H0.2(折合生物炭面积施用方式为混合添加5.43 kg/m^(2))作为有效改善红砂岩侵蚀劣地的外源性有机碳改良措施,为红砂岩侵蚀劣地土壤初步恢复提供技术参考。Red sandstone possesses unique geological mechanical properties such as intense physical weathering,softening upon contact with water,proneness to disintegration and fragmentation,as well as reduced strength.Thesecharacteristics lead to its high susceptibility to erosion,difficulty in recovery,and propensity to form eroded inferiorland.To better address the weak practices in the management of eroded red sandstone land,this study conducted potexperiments to analyze the changes in soil physical and chemical properties and plant growth characteristics after addingdifferent exogenous organic carbons.The study aimed to identify the most effective exogenous organic carbon with thebest comprehensive improvement effects,compare the improvement of soil with different addition methods andconcentrations,and distill effective measures for the recovery of exogenous organic carbon on eroded red sandstone land.The results showed that among the 7 common types of exogenous organic carbon added for comparison,"biochar" wasselected as the exogenous organic carbon with better comprehensive improvement effects.By comparing the improvementeffects and cost of different addition methods and concentrations of biochar on the soil of eroded red sandstone land,H0.2(equivalent to a mixed application method of biochar at 5.43 kg/m~2)was identified as an effective measure forimproving the soil of eroded red sandstone land.This provides a reference basis and technical support for the initialrecovery of eroded red sandstone land soil.

关 键 词：外源性有机碳 红砂岩 侵蚀劣地 土壤改良 植被恢复 

分 类 号：S157[农业科学—土壤学]