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| DOI：10.13522/j.cnki.ggps.2021366 |
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| The Effect of Drip Fertigation with Yellow River Water on Water Consumption and Yield of Summer Maize |
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CAO Xuesong, ZHENG Hexiang, MIAO Ping, et al
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1.Institute of Water Resources for Pastoral Area of China Institute of Water Resources and
Hydropower Research, Huhhot 010020, China; 2. Ordos River and Lake Protection Center, Ordos 017000, China;
3. Ordos Development Center of Water Conservancy, Ordos 017000, China;
4. School of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| 【Background and objective】Irrigation and fertilization combine to modulate water uptake and crop yield. The purpose of our work is to find a rational fertigation scheduling for corn production drip-irrigated using the Yellow River water in Ordos, Inner Mongolia. 【Method】The experiment was conducted in a corn field. The crop was drip-irrigated at the irrigation amount of 225, 300 and 375 m3/hm2 respectively, each having two nitrogen applications: 207 and 276 kg/hm2. In each treatment, we measured water consumption and the crop yield.【Result】Coupling irrigation and nitrogen fertilization showed a positive interaction between them in certain ranges. Water consumption and its associated consumption intensity both increased with the irrigation amount, peaking at the tasseling -filling stage. Increasing nitrogen fertilization did not always result in a significant effect on water consumption, nor increased the thousand-grain weight, grain yield and water productivity. When the irrigation amount was in the range of 4 206.84~4 890.36 m3/hm2 and the fertilization in 977.13~1 122.87 kg/hm2, there was a high probability (95%) to increase the corn yield to more than 8 765.55 kg/hm2.【Conclusion】Considering water saving, yield and water and nitrogen use efficiency, the optimal drip-fertigation using Yellow River water for corn production in Ordos was to irrigate 300 m3/hm2 of water in 12~14 times, with 1 200 kg/hm2 (46% of nitrogen) of fertilization. |
| Key words: drip fertigation; corn; water consumption; grain yield; water production efficiency |
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