土壤与作物2018，Vol.7Issue(2)：130-138,9.DOI:10.11689/j.issn.2095-2961.2018.02.005
不同耕作方式下蚯蚓和秸秆还田对土壤氮素的影响
Effects of earthworms and straw additions on soil nitrogen under different tillage practices
摘要
Abstract
No tillage greatly increases earthworm abundance due to low disturbance and residue returning , while earthworms strongly influence soil structure and soil organic matter dynamics as well .How will earthworms combined with residue returning affect distribu-tion and decomposition of soil N? Aiming at understanding the effects of earthworms and straw adding on total N and active nitrogen fractions , by using undisturbed soils , we conducted a 30-day incubation experiment with earthworms and maize residue additions un-der no tillage ( NT) and conventional tillage ( CT) systems.The results showed that the contents of soil total nitrogen and soil active nitrogen in NT were higher than those in CT or equal to CT .The effects of earthworm and straw on soil nitrogen dynamics were different under CT and NT.The addition of straw decreased soil active nitrogen content in CT and the total nitrogen and active nitrogen contents in NT, respectively.In contrast, the earthworm decreased soil active nitrogen content in CT , while increased the total nitrogen and ac-tive nitrogen content in NT.The effect of earthworm and straw coexisting in conventional tillage would be less than the effect of a single role but still played a role in reducing nitrogen content;parts of the effect from earthworm and straw coexisting in NT was offset com-pared with the influence of single factor ( earthworm or residue returning ) , which resulted in the N content ranging between the values under single earthworm and single straw treatments .This result would help us to select the appropriate farming measures and find out the optimal amount of straws returned to the field for maintaining soil fertility and reducing soil fertilizer .关键词
免耕/蚯蚓/秸秆/土壤氮Key words
no tillage/earthworms/straw/soil nitrogen分类
农业科技引用本文复制引用
郭亚飞,翟正丽,张延,张晓平,陈学文,梁爱珍..不同耕作方式下蚯蚓和秸秆还田对土壤氮素的影响[J].土壤与作物,2018,7(2):130-138,9.基金项目
中国科学院前沿科学重点研究项目(QYZDB-SSW-DQC035) （QYZDB-SSW-DQC035）
中国科学院青年创新促进会项目(2015183) （2015183）
中国科学院黑土区农业生态重点实验室基金项目(2016ZKHT-02). （2016ZKHT-02）
