| Cite this article: | 菅浩然,刘洪波,李连豪,等.不同微喷氮肥制度对冬小麦产量及水氮利用效率的影响[J].灌溉排水学报,0,():-. |
| JANG Haoran,LIU Hongbo,LI Lianhao,et al.不同微喷氮肥制度对冬小麦产量及水氮利用效率的影响[J].灌溉排水学报,0,():-. |
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| Effects of different nitrogen management with micro-spraying systems on yield, water and nitrogen use efficiency of winter wheat |
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JANG Haoran1, LIU Hongbo1, LI Lianhao2, LI Zongpeng3, Yangyawei4
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1.Institute of Water Conservancy Engineering,Yellow River Conservancy Technical Institute,Kaifeng;2.Henan Agricultural University;3.College of mechanical and electrical engineering, Henan Agricultural University;4.Henan Ruitong Irrigation and Drainge Equipment Co., Ltd
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| Abstract: |
| Abstract: 【Background】 Excessive or improper nitrogen application rate leads to waste resource and environmental pollution and new highly efficient nitrogen application methods need to be further studied to improve nitrogen use efficiency.【Objective】The purpose of this paper is to determine the suitable N-fertilizer management scheme for winter wheat under micro-sprinkling fertigation system in Xinxiang area.【Method】A field experiment was conducted at Xinxiang experimental station of Henan province, to study the effects of nitrogen application amount and frequencies on the yield, net photosynthetic rate and water and nitrogen utilization of winter wheat under fertigation with a micro-sprinkling system. 【Results】The results showed that the yield of winter wheat no longer increased significantly after N2F2 treatment (240 kg N hm-2, topdressing at jointing and flowering stage) and the kernels per spike and thousand grains weight of wheat increased with the increase of nitrogen application amount and frequency. Compared with the traditional nitrogen treatment at jointing stage, nitrogen topdressing at jointing and flowering stage can increase the net photosynthetic rate of flag leaves, and the average thousand grains weight increased by 13.3%, and the average yield increased by 3.0%. The N2F2 and N3F2 treatments had the highest water use efficiency and nitrogen use efficiency, but N2F2 treatment was 60 kg N hm-2 less than N3F2 treatment. 【Conclusion】Therefore, a total nitrogen application amount of 240 kg N hm-2 and topdressing with two times at the jointing (70 kg hm-2) and anthesis stages (70 kg hm-2) were recommended as a local nitrogen fertilizer management scheme under micro-sprinkling system. |
| Key words: micro-sprinkling; fertigation; nitrogen utilization; winter wheat; yield |
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