| 轮耕对冬春休闲旱地土壤结构及团聚体稳定性的影响 |
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| 引用本文： | 赵冀,王维,张鹏,侯贤清,贾志宽,韩清芳.轮耕对冬春休闲旱地土壤结构及团聚体稳定性的影响[J].干旱地区农业研究,2017,35(6):52-58. |
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| 作者姓名： | 赵冀 王维 张鹏 侯贤清 贾志宽 韩清芳 |
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| 作者单位： | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China,Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China; Xuanhua Vocational College of Science and Technology, Hebei, Zhangjiakou, 075100, China,Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China,Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China,Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China and Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China |
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| 基金项目： | 国家“十二五”863课题(2013AA102902)；“十二五”国家科技支撑计划课题(2012BAD09B03)；高等学校学科创新引智计划项目(B12007)；公益性行业(农业)项目(201303104) |
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| 摘 要： | 为了探索半干旱区合理的耕作制度,改善旱地土壤结构,提高农田生产力,于2007—2010年在宁南旱区进行了冬闲期免耕/深松/深松(N/S/S)、深松/免耕/免耕(S/N/N)、连年免耕(NT)及连年翻耕(CT)4种不同耕作模式试验,研究了轮耕对土壤孔隙度、团聚体结构组成及其稳定性的影响。结果表明,N/S/S轮耕处理较CT和NT显著降低了冬春休闲旱作农田0~20 cm土层的土壤容重和土壤孔隙度,降低幅度2.5%~3.1%,较S/N/N轮耕处理20~40 cm土层土壤孔隙度提高了2.8%(P0.05);NT处理与S/N/N轮耕处理0~40 cm土层0.25 mm机械稳定性与水稳性团聚体含量、平均重量直径(MWD)和几何平均直径(GMD)均高于翻耕处理。连续两年以上免耕处理(NT和S/N/N)能够促进旱作农田土壤团聚体的形成,增加了土壤团聚体平均重量直径和几何平均直径,降低了土壤团聚体的破坏率,提高了土壤的结构稳定性。
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| 关 键 词： | 轮耕 团聚体 平均重量直径 几何平均直径 土壤容重 土壤孔隙度 |
Effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period |
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| ZHAO Ji,WANG Wei,ZHANG Peng,HOU Xian-qing,JIA Zhi-kuan,HAN Qing-fang.Effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period[J].Agricultural Research in the Arid Areas,2017,35(6):52-58. |
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| Authors: | ZHAO Ji WANG Wei ZHANG Peng HOU Xian-qing JIA Zhi-kuan HAN Qing-fang |
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| Abstract: | |
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| Keywords: | rotational tillage soil aggregates mean weight diameter (MWD) geometric mean diameter (GMD) soil bulk density soil proosity |
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