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| Effects of irrigation schedule on water consumption and yield of seed maize |
| Dong Pingguo1, Wang Zengli1, Wen Guanggui2, Fan Xiaokang3 |
| 1.Key Irrigation Experimental Station in Wuwei, Wuwei, Gansu 733000, China; 2.Department of Mechanical Engineering, Wuwei Occupational College, Wuwei, Gansu 733000, China; 3.Integrated Service Centre on Water Conservancy Technologies in Wuwei City, Wuwei, Gansu 733000, China |
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Abstract The effects of irrigation frequency on soil moisture, water consumption and water use efficiency(WUE)in growth stage, maize seed yield are studied for seed maize by field experiment under 900 m3/hm2 constant irrigation quota and four irrigation frequencies: 0, 2, 3, 4, respectively. It is showed that irrigation frequency mainly affects the soil moisture in 0-100 cm layer after jointing stage, the number of rows per ear and the number of kernels per row. The highest water consumption mainly appears in tasseling and grain fill stages. Seed maize demonstrates a variably sensitive degree to water shortage during its various growth stages, i.e. the degree decreases steadily in a sequence such as fill, jointing, seedling, milk and tasseling stages. An irrigation schedule, such as 900 m3/hm2 irrigation quota for 3 times in seeding and jointing stages, jointing and tasseling stages, tasseling and filling stages, respectively, exhibits a higher economic yield and a better WUE in arid and semi-arid areas in Northwest China.
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Received: 26 December 2013
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