| Cite this article: | 曹雪松,郑和祥,李和平,等.引黄滴灌条件下水氮互作对玉米耗水特性及产量的影响[J].灌溉排水学报,0,():-. |
| CAO Xuesong,ZHENG Hexiang,LI Heping,et al.引黄滴灌条件下水氮互作对玉米耗水特性及产量的影响[J].灌溉排水学报,0,():-. |
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| Effect of Water and Nitrogen Interaction on Water Consumption Characteristics and Yield of Maize under the Condition of Yellow River Diversion and Drip Irrigation |
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CAO Xuesong1, ZHENG Hexiang1, LI Heping1, MIAO Ping2
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1.Institute of Water Resources for Pastoral Area of China Institute of Water Resources and Hydropower Research;2.River and Lake Protection Center of Ordos City
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| Abstract: |
| 【Background】The purpose of our research is to formulate a reasonable water and fertilizer control plan for the yellow river diversion irrigation corn in the irrigation area of the south bank of the Yellow River in Ordos, in order to provide scientific basis and technical support for the popularization and application of the drip irrigation technology in the irrigation area of the south bank of the Yellow River in Ordos.【Method】Using the method of field experiment, the irrigation quota of the Yellow River Diversion Irrigation is set at three levels of 225, 300 and 375 m3/hm2, and the fertilization rate is set at two levels of 450 and 600 kg/hm2. The impact of water consumption, water consumption intensity, water productivity and corn yield.【Result】The coupling of drip irrigation water and nitrogen in an appropriate range shows a significant positive interaction. Water consumption and water consumption intensity showed an increasing trend with the increase of irrigation quota. The peak of water consumption and water consumption intensity appeared in the tasseling stage-filling stage of corn. Under certain water conditions, increasing the amount of fertilizer has no significant effect on the water consumption characteristics of corn; under certain irrigation conditions, increasing the amount of fertilization cannot significantly increase the thousand-grain weight, grain yield and water productivity of the crop, which is too high Fertilization has a negative impact on yield and water productivity. When the irrigation rate is 4 206.84 ~ 4 890.36 m3/hm2 and the fertilizer rate is 977.13 ~ 1 122.87 kg/hm2, there is a 95% probability that corn yields greater than 8 765.55 kg/hm2 can be obtained by drip irrigation.【Conclusion】Considering production factors such as water saving, high yield and high efficiency, it is recommended that the irrigation quota for maize in the irrigation area on the south bank of the Yellow River in Ordos is about 300 m3/hm2, irrigation 12 - 14 times, and the amount of fertilizer is about 1 200 kg/hm2. |
| Key words: drip irrigation; corn; water consumption; grain yield; water production efficiency |
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