| 引用本文: | 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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| 摘要: |
| 【目的】建立新乡地区微喷水肥一体化条件下冬小麦适宜的氮肥管理制度。【方法】通过田间试验研究了微喷水肥一体化条件下不同氮肥施入量和追氮频率对冬小麦产量、灌浆期旗叶净光合速率及水氮利用效率的影响。【结果】冬小麦的产量在超过N2F2（240 kg N hm-2，追施2次）处理后不再显著增加，穗粒数和千粒质量随着施氮量和施氮频率的增大而增加。在开花期追氮能提高旗叶净光合速率，从而使得千粒质量平均值增加13.3%，产量平均值增加3.0%；N2F2和N3F2处理下对应的水分利用效率值和氮素利用效率值最高，但N2F2处理要比N3F2处理减少60 kg N hm-2 施入量。同时，相比于传统灌溉施肥管理制度而言，采用微喷水肥一体化技术能在保持产量不变的情况下，显著提高氮素和水分利用效率。【结论】建议在该地区采用微喷水肥一体化技术的条件下采用240 kg hm-2 的氮肥管理量，并且在拔节期（70 kg hm-2）和开花期（70 kg hm-2）分两次追施的氮肥管理制度。该研究为该地区合理施用氮肥量和施用时期以及相应的技术要求提供了理论依据，对提高该区冬小麦种植管理中水分和氮素利用效率具有重要意义。 |
| 关键词: 微喷;水肥一体化;水氮利用效率;产量;冬小麦 |
| DOI： |
| 分类号:S275.6 |
| 基金项目: |
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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 |
