摘要
合理施用改良剂能有效促进贫瘠土壤有机碳(SOC)积累,提升土壤肥力.不同类型改良剂施用对砂质土壤SOC含量的影响程度存在差异.探讨改良剂施用对砂质土壤SOC含量的影响及其主要控制因素,可为砂质土壤肥力提升措施的制定提供科学依据.搜集1987~2023年已公开发表的文献114篇,建立关于改良剂施用对砂质土壤SOC影响的相关数据617组.采用数据整合分析方法(Meta-analysis)阐明改良剂种类及施用量、气候和土壤属性等因素下改良剂施用对砂质土壤SOC含量的影响,并通过回归分析和随机森林等统计分析方法解析改良剂施用后砂质土壤SOC变化的主控因素.结果表明:①改良剂施用显著提高了砂质土壤SOC含量,平均提高幅度为61%,其中无机改良剂施用对砂质土壤SOC的提升幅度(161%)显著高于有机改良剂(37%)和复合改良剂(54%);②无机改良剂施用量和持续时间对砂质土壤SOC提升幅度无显著影响;在有机改良剂中,砂质土壤SOC提升幅度随生物质炭和有机肥的施用量增加而增强,随改良剂施用的持续时间增加而降低;③气候条件、改良剂施用量、持续时间和土壤理化性质共同解释了砂质土壤SOC响应变异的88%.改良剂施用引起的SOC含量变化幅度随着年均温度、土壤初始SOC含量和pH值的增加而显著降低,与干旱程度、土壤容重和含沙量显著正相关.总体而言,施用改良剂显著提高了砂质土壤SOC含量,改良剂种类及施用量、气候条件和土壤初始性质调控砂质土壤SOC含量对改良剂的响应程度.因此,在砂质土壤中施用改良剂时应综合考虑改良剂种类及施用量、气候条件和土壤性质,有效提高砂质土壤SOC含量和肥力水平.
Proper application of soil amendments can effectively increase the accumulation of soil organic carbon(SOC)in poor soils,thereby enhancing soil fertility level.The impacts of different types of amendments on the SOC content of sandy soils varies widely.Investigating the effects of various amendments on the SOC content of sandy soils and associated key controlling factors provides a scientific basis for formulating strategies to enhance the fertility of sandy soils.A data set was established with 617 pairs of data from 114 published studies that reported the effects of amendment application on SOC content of sandy soil during 1987 and 2023.Meta-analysis was used to quantitatively analyze the effects of amendment application on the SOC content of sandy soil globally under the conditions of various amendment types and application rates,climates,and soil properties.This study also investigated the major controlling factors for the changes in SOC in sandy soil after amendment application using regression analysis and random forest model.The research results showed that:①Amendment application significantly increased SOC content by 61%on average in sandy soils and the application of inorganic amendment increased SOC in sandy soils(161%)to a significantly greater extent than that of organic amendment(37%)and compound amendment(54%).②The application amount and duration of inorganic amendments had no significant effect on the increase of SOC in sandy soil.Among the organic amendments,the increase of SOC in sandy soil was enhanced with the increase in the application amount of biomass carbon and organic fertilizer and decreased with the application duration of the amendment.③Climatic conditions,the amount and duration of amendments,and soil physicochemical properties combined explained 88%of the variability in SOC response in sandy soils.The magnitudes of SOC change due to amendment application significantly decreased with increased average annual temperature,initial SOC content,and soil pH,however,positively correlat
作者
刘天鸿
邬磊
梁飞
王军
任科宇
徐明岗
汤水荣
张文菊
LIU Tian-hong;WU Lei;LIANG Fei;WANG Jun;REN Ke-yu;XU Ming-gang;TANG Shui-rong;ZHANG Wen-ju(College of Tropical Agriculture and Forestry,Hainan University,Haikou 570228,China;State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China,Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;College of Resources and Environment,China Agricultural University,Beijing 100193,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2024年第12期6949-6958,共10页
Environmental Science
基金
新疆维吾尔自治区重大科技专项项目(2022A02007-1)
科技部基础资源调查专项(2021FY100501)
海南省自然科学基金项目(323MS016)。
