玉米秸秆源有机物料还田对黑土团聚体碳氮分布的影响
Impact of Maize Straw-Derived Organic Amendments on Soil Aggregates and Distribution of Carbon and Nitrogen in Black Soil
刘婷慧 1范围 2闫金垚 2张畅 2张水梅 2程松 2袁静超 2刘剑钊 2任军 2梁尧 2蔡红光2
作者信息
- 1. 吉林农业大学资源与环境学院,长春 130118
- 2. 吉林省农业科学院农业资源与环境研究所/农业农村部黑土地保护与利用重点实验室,长春 130033
- 折叠
摘要
采集7年定位试验中单施化肥(CK)、化肥配施秸秆(ST)、化肥配施堆肥(CP)、化肥配施生物炭(BR)4种施肥处理的耕层(0～20 cm)土壤样品进行测定,探讨玉米秸秆还田对黑土团聚体稳定性及其碳、氮分配特性的影响.结果表明,与CK处理相比,CP和BR处理的土壤有机碳含量显著提高,增幅分别为16.2％和32.4％.土壤全氮含量仅在BR处理显著提高,增幅为4.7％.与CK处理相比,BR处理的土壤团聚体碳含量增幅最明显(19.9％～65.8％),以2～1 mm粒径增幅最高.生物炭连年还田大幅增加了耕层土壤有机碳和全氮含量,堆肥还田显著提高了土壤有机碳含量.生物炭还田显著增加了土壤及各粒径团聚体的碳氮比,说明其土壤有机碳具有较强的生物稳定性.
Abstract
The effects of maize straw returning on the stability of black soil aggregates and the distribution char-acteristics of carbon and nitrogen were discussed.Based on a seven year field experiment,the soil samples of plough layer(0-20 cm)treated with single chemical fertilizer(CK),chemical fertilizer combined with straw(ST),chemical fer-tilizer combined with compost(CP)and chemical fertilizer combined with biochar(BR)were collected for determina-tion.The results showed that the soil organic carbon content of CP and BR treatments was significantly increased by 16.2％and 32.4％,respectively.Soil total nitrogen content increased significantly only in BR treatment,with an in-crease of 4.7％.Compared with CK,the increase of soil aggregate carbon content in BR treatment was the most obvi-ous(19.9％-65.8％),and the increase of 2-1 mm particle size was the highest.Continuous application of biochar re-turning significantly increased the content of soil organic carbon and total nitrogen in the topsoil,and compost re-turning significantly increased the content of soil organic carbon.Biochar returning significantly increased the C/N ratio in both the soil and its aggregates,indicating that soil organic carbon had strong biological stability.
关键词
黑土/秸秆/生物炭/有机碳/全氮/团聚体Key words
Black soil/Straw/Biochar/Organic carbon/Total nitrogen/Soil aggregate引用本文复制引用
基金项目
国家自然科学基金合(协)作项目(42061124002)
吉林省科技厅重大科技专项(20220302001NC)
吉林省黑土工程研究中心自主创新能力建设项目(2022C032)
吉林省农业科技创新工程国际科技合作项目(CXGC202110GH)
吉林省农业科技创新工程项目(CXGC2021RCB005)
吉林省农业科技创新工程项目(KYJF2023DX017)
出版年
2024
NETL
NSTL
万方数据