山东农业科学2023，Vol.55Issue(12)：112-118,7.DOI:10.14083/j.issn.1001-4942.2023.12.015
滨海盐碱地土壤有机碳与有效氮磷对保氮增碳处理的响应及其机制研究
Soil Organic Carbon and Available Nitrogen and Phosphorus in Coastal Saline-Alkali Land Response to Nitrogen Preservation and Carbon Enhancement Treatments and Its Mechanisms
摘要
Abstract
Using the indoor biochemical culture test,this rearch studied the responses of soil organic carbon and nutrients in coastal saline-alkali land to different combinations of straw returning,high-efficiency nitrogen fertilizer and straw decomposing agent,and revealed the mechanism from the perspective of soil enzy-mology,in order to provide scientific bases for selecting schemes of rapid improvement and soil fertility in-crease of coastal saline-alkali land.Five nitrogen-preserving and carbon-increasing treatments were set as no fertilization+straw returning+straw decomposing agent(T1),farmers'conventional fertilization(small granular urea)+straw returning+straw decomposing agent(T2),stabilized nitrogen fertilizer+straw retur-ning+straw decomposing agent(T3),water-based resin-coated urea+straw returning+straw decomposing agent(T4)and waterborne resin-coated urea+straw returning+modified straw decomposing agent(T5).The results showed that the nitrogen-preserving and carbon-increasing treatments could increase the contents of soil organic carbon,inorganic nitrogen and available phosphorus gradually with the extension of cultivation time;the soil organic carbon,inorganic nitrogen and available phosphorus increased by 23.12%～38.63%,13.93%～33.56%and 4.75%～25.32%respectively after 90 days of culture compared with the farmes'con-ventional fertilization treatment.The activities of urease and alkaline phosphatase increased by 47.51%～61.67%and 49.80%～65.16%respectively,and the activity of nitrate reductase decreased by 7.89%～28.67%under the nitrogen-preserving and carbon-increasing treatments.T5 treatment had significant soil im-provement effect for the most obvious increase of soil organic carbon and effective nutrients,so it would be the best scheme to achieve rapid improvement and soil fertility increase of coastal saline-alkali land.关键词
秸秆还田/土壤有机碳/无机氮/有效磷/土壤酶活性/滨海盐碱土Key words
Straw returning/Soil organic carbon/Inorganic nitrogen/Available phosphorus/Soil en-zyme activity/Coastal saline-alkali soil分类
农业科技引用本文复制引用
姬广庆,林海涛,毕玉波,李兆勇,宋玲玲,刘庆,王梅,沈玉文,王江涛..滨海盐碱地土壤有机碳与有效氮磷对保氮增碳处理的响应及其机制研究[J].山东农业科学,2023,55(12):112-118,7.基金项目
山东省农业科学院农业科技创新工程项目(CXGC2023A14) （CXGC2023A14）
国家小麦产业技术体系岗位科学家项目(CARS-03) （CARS-03）
国家重点研发计划项目(2021YFD1900903) （2021YFD1900903）
2022年度省重点扶持区域引进急需紧缺人才项目(鲁发改动能办[2022]820号) （鲁发改动能办[2022]820号）
