| 不同沟灌方式下玉米根区矿物氮迁移动态研究 |
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| 引用本文： | 刘小刚,张富仓,杨启良,王金凤,李志军. 不同沟灌方式下玉米根区矿物氮迁移动态研究[J]. 中国生态农业学报, 2011, 19(3): 540-547. DOI: 10.3724/SP.J.1011.2011.00540 |
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| 作者姓名： | 刘小刚 张富仓 杨启良 王金凤 李志军 |
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| 作者单位： | 1. 昆明理工大学现代农业工程学院,昆明,650024;西北农林科技大学旱区农业水土工程,教育部重点实验室,杨凌,712100
2. 西北农林科技大学旱区农业水土工程,教育部重点实验室,杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目(50579066, 50879073, 51009073)、国家科技支撑计划项目(2007BAD88B10)、云南省应用基础研究项目(2010ZC043, 2010ZC042)和昆明理工大学测试基金项目(2010295)资助 |
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| 摘 要： | 为探索交替隔沟灌溉下玉米根区矿物氮分布规律, 通过遮雨棚内微区试验, 研究了常规沟灌、交替隔沟灌和固定隔沟灌3 种沟灌方式对玉米根区硝态氮、铵态氮迁移的影响。结果表明: 交替隔沟灌溉根区硝态氮等值线和常规沟灌相似, 沟内硝态氮含量基本沿垄的中心对称分布。固定隔沟灌溉的湿润沟内硝态氮含量小于干燥沟, 施氮后非灌水沟硝态氮保持较高水平。收获时交替隔沟灌溉的根区硝态氮残留量比常规灌溉略高。与硝态氮分布相比, 铵态氮在根区土壤中的含量很小, 3 种沟灌方式在沟和垄中的铵态氮含量没有明显差异。
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| 关 键 词： | 遮雨棚微区试验 交替隔沟灌溉 硝态氮 铵态氮 迁移 根区土壤 玉米 |
| 收稿时间： | 2010-08-20 |
| 修稿时间： | 2011-01-19 |
Transfer of mineral nitrogen in maize root zone soil under different furrow irrigation modes |
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| LIU Xiao-Gang,ZHANG Fu-Cang,YANG Qi-Liang,WANG Jin-Feng and LI Zhi-Jun. Transfer of mineral nitrogen in maize root zone soil under different furrow irrigation modes[J]. Chinese Journal of Eco-Agriculture, 2011, 19(3): 540-547. DOI: 10.3724/SP.J.1011.2011.00540 |
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| Authors: | LIU Xiao-Gang ZHANG Fu-Cang YANG Qi-Liang WANG Jin-Feng LI Zhi-Jun |
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| Affiliation: | Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650024, China; Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education; Northwest A & F University, Yan;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education; Northwest A & F University, Yangling 712100, China;Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650024, China; Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education; Northwest A & F University, Yan;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education; Northwest A & F University, Yangling 712100, China;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education; Northwest A & F University, Yangling 712100, China |
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| Abstract: | The objective of this study was to explore the distribution of mineral nitrogen in maize root zone soils under alternative furrow irrigation. To that end, micro-field rain-shield experiments were conducted to determine the effects of three different furrow irrigation modes [conventional furrow irrigation (CFI), alternative furrow irrigation (AFI) and fixed furrow irrigation (FFI)] on NO3--N and NH4+-N transfer in maize root zone soils. Results showed that NO3--N content in AFI root zone soils was similar to that in CFI. Also NO3--N in furrow profile occurred along centre line ridge symmetry. Under FFI, NO3--N content in wet furrow was less than that in dry furrow. The content in dry furrow steadily increased after fertilization. At harvest, NO3--N residue in AFI was slightly higher than that in CFI. Compared with NO3--N, NH4+-N content was very little. There was no significant difference in furrow and ridge in terms of NO3--N and NH4+-N content. |
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| Keywords: | Micro-field rain-shield experiment Alternative furrow irrigation Nitrate nitrogen Ammonium nitrogen Transfer Root zone soil Maize |
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