| 长期秸秆还田对典型砂姜黑土胀缩特性的影响机制 |
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| 引用本文： | 王擎运,陈景,杨远照,柴如山,叶新新,郜红建,马东豪,张佳宝,周云鹏.长期秸秆还田对典型砂姜黑土胀缩特性的影响机制[J].农业工程学报,2019,35(14):119-124. |
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| 作者姓名： | 王擎运 陈景 杨远照 柴如山 叶新新 郜红建 马东豪 张佳宝 周云鹏 |
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| 作者单位： | 1. 安徽农业大学资源与环境学院 农田生态保育与污染防控安徽省重点实验室，合肥 230036; 2. 中国科学院南京土壤研究所 土壤与农业可持续发展国家重点实验室，南京 210008;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036;,2. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室，南京 210008;,2. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室，南京 210008;,1. 安徽农业大学资源与环境学院农田生态保育与污染防控安徽省重点实验室，合肥 230036; |
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| 基金项目： | 国家重点研发计划项目（2016YFD0300801）；安徽省科技重大专项（18030701188）；土壤与农业可持续发展国家重点实验室开放基金（Y20160014）；耕地培育技术国家工程实验室开放基金（201705）。 |
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| 摘 要： | 易于胀缩是砂姜黑土最典型的属性障碍因子之一。该文依托长期定位试验(2007―2017年)研究了秸秆还田对砂姜黑土收缩的影响机制。田间试验设置5个处理:不施肥(CK)、常规氮磷钾(F),及氮磷钾配施下的玉米秸秆还田(MSF)、小麦秸秆还田(WSF)和小麦-玉米双季秸秆还田(WMSF)。结果显示土壤容重(soil bulk density,SBD)呈现WMSFWSF≈MSF≈FCK,与土壤田间持水量(fieldmoisturecapacity,FC)的变化规律相反。WMSF处理土壤田间持水量为38%,高于CK处理7.38%。土壤比容积差值与土壤线性伸展系数(coefficient of linear extensibility,COLE)和有机质(soil organic matter,SOM)含量均呈显著正相关(P0.05)。土壤收缩主要集中于正常段和滞留段,而质量含水量下降则表现在结构段和滞留段较为明显。尽管秸秆还田,尤其MSF处理结构段土壤含水量较大,但土体未发生明显收缩行为。综上所述,SOM累积因自身胀缩造成土体更强烈收缩,但通过水养增容实现了土体易于胀缩属性障碍因子的消减。小麦秸秆还田可显著提升土壤SOM含量,而玉米秸秆还田因难以腐化对土壤大孔隙度影响较大,小麦-玉米双季秸秆还田更符合该类型土壤农业生产中有机质提升、结构改善,水养增容的实际需求。
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| 关 键 词： | 土壤 秸秆 还田 砂姜黑土 土壤收缩特性 |
| 收稿时间： | 2018/9/24 0:00:00 |
| 修稿时间： | 2019/6/10 0:00:00 |
Effect mechanism of long-term straw returning on shrinkage characteristic in typical Shajiang black soil |
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| Wang Qingyun,Chen Jing,Yang Yuanzhao,Chai Rushan,Ye Xinxin,Gao Hongjian,Ma Donghao,Zhang Jiabao and Zhou Yunpeng.Effect mechanism of long-term straw returning on shrinkage characteristic in typical Shajiang black soil[J].Transactions of the Chinese Society of Agricultural Engineering,2019,35(14):119-124. |
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| Authors: | Wang Qingyun Chen Jing Yang Yuanzhao Chai Rushan Ye Xinxin Gao Hongjian Ma Donghao Zhang Jiabao and Zhou Yunpeng |
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| Institution: | 1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; 2. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;,1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;,1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;,1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;,1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;,1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;,2. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;,2. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; and 1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China; |
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| Abstract: | |
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| Keywords: | soils straw returning Shajiang black soil soil shrinkage property |
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