| 保护性耕作对潮土团聚体组成及其有机碳含量的影响 |
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| 引用本文： | 陈文超,朱安宁,张佳宝,朱强根,杨文亮,舒 馨.保护性耕作对潮土团聚体组成及其有机碳含量的影响[J].土壤,2014,46(1):35-40. |
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| 作者姓名： | 陈文超 朱安宁 张佳宝 朱强根 杨文亮 舒 馨 |
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| 作者单位： | 封丘农业生态实验站，土壤与农业可持续发展国家重点实验室（(中国科学院南京土壤研究所）) |
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| 基金项目： | 国家重点基础研究发展计划(973计划)项目(2011CB100504)、中国科学院知识创新重要方向项目(KZCX2-YW-JS408)、中国科学院重点部署项目(CXJQ120112)和公益性行业(农业)科研专项经费项目(201203030-06)资助 |
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| 摘 要： | 利用保护性耕作长期定位试验平台,研究了小麦-玉米轮作条件下连续5年实施免耕与秸秆还田对农田潮土团聚体组成、团聚体中有机碳含量的影响。结果表明:相比于常规翻耕,常规翻耕+秸秆还田、免耕、免耕+秸秆还田处理下5 mm粒级机械稳定性团聚体含量显著提升,增加比例分别为16.62%、16.05%、44.23%;而免耕、免耕+秸秆还田能显著提升5~2 mm粒级水稳性团聚体含量,提升比例分别为29.81%和64.28%,同时团聚体稳定率也有一定的提高;实施免耕能显著提高5~2、2~1 mm粒级水稳性团聚体中有机碳含量;除常规翻耕+秸秆还田处理下2~1 mm粒级外,秸秆还田对各粒级团聚体中有机碳含量均有不同程度的提升作用。
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| 关 键 词： | 保护性耕作 潮土 团聚体 有机碳 |
Effects of Conservation Tillage on the Composition and Organic Carbon Content of Soil Aggregates in Fluvo-aquic Soil |
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| CHEN Wen-chao,ZHU An-ning,ZHANG Jia-bao,ZHU Qiang-gen,YANG Wen-liang,SHU Xin.Effects of Conservation Tillage on the Composition and Organic Carbon Content of Soil Aggregates in Fluvo-aquic Soil[J].Soils,2014,46(1):35-40. |
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| Authors: | CHEN Wen-chao ZHU An-ning ZHANG Jia-bao ZHU Qiang-gen YANG Wen-liang SHU Xin |
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| Institution: | State Experimental Station of Agro-Ecosystem in Fengqiu, State Key Laboratory of Soil and Sustainable Agriculture (Institute of Soil Science, Chinese Academy of Sciences) |
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| Abstract: | In this study, effects of five-year no-tillage and straw returning on composition and organic carbon content of soil aggregates in farmland fluvo-aquic soil were investigated in a long-term experiment site of conservation tillage. The research results showed that: compared with the conventional tillage treatment, content of >5 mm mechanically stable aggregates under conventional tillage+straw returning, no-tillage, no-tillage+straw returning treatments were significantly improved, the proportions were respectively: 16.62%, 16.05%, 44.23%; And no-tillage and no-tillage+straw returning could significantly improve content of 5-2 mm water stable aggregates, the proportions were respectively: 29.81% and 64.28%, stabilities of soil aggregates were also improved to some extent; Implementing no-tillage could significantly improve organic carbon content of 5- 2 mm, 2-1 mm water stable aggregates; Except 2-1 mm under conventional tillage+straw returning treatment, straw returning improved organic carbon content of all the size water stable aggregates inordinately. |
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| Keywords: | Conservation tillage Fluvo-aquic soil Aggregate Organic carbon |
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