| Effects of irrigation quota on distribution characteristics of soil water-salt and water consumption during maize seed production under ridge and furrow farming |
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| DOI：10.7606/j.issn.1000-7601.2016.01.08 |
| Key Words: maize seed production ridge farming furrow irrigation irrigation quota water-salt transport yield |
| Author Name | Affiliation | | WANG Zeng-li | Key Irrigation Experimental Station in Wuwei, Wuwei, Gansu 733000, China | | ZHU Xing-ping | The Integrated Service Centre on Water Conservancy Technologies, Wuwei, Gansu 733000, China | | WEN Guang-gui | Wuwei Occupational College, Wuwei, Gansu 733000, China | | YIN Qing-de | The Integrated Service Centre on Water Conservancy Technologies, Wuwei, Gansu 733000, China |
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| Abstract: |
| A field experiment was conducted to study the effects of irrigation quota on distribution of water and salt in soil, yield and water use efficiency during maize seed production under ridge and furrow farming. The results showed that the distributions characteristics of water and salt in soil of the ridges were different from those of furrows at the 0～100 cm soil layer. With the increase of quota, salt was accumulated in ridge soil, exhibiting more significant consequence than in the furrow. Soil moisture content in the deep soil layer was higher than that in the top soil. The desalination of the shallow soil was elevated with the increase of irrigation quota at the irrigation stage. At the evapotranspiration stage, salt was evidently accumulated in shallow soil with the treatment of large irrigation quota. The irrigation quota had an apparent influence on crop evapotranspiration and soil water storage capacity. When irrigating water quota was above 400 m3·hm-2, the vertical movement of soil moisture was significantly higher than horizontal movement, promoting water storage capacity in the deep soil. With the elevation of irrigation quota, fruit length, ear row number and kernel seeds per row of maize became increased. In conclusion, for water-saving and yield improvement, irrigation schedule with irrigation quota of 2 500 m3·hm-2 (at seeding, jointing, late jointing, heading and filling stages) was thereby recommended as the optimal practice to increase WUE (0.825 kg·m-3), preventing soil salt from moving up and increasing yield of maize seed production (4 219.91 kg·hm-2). |
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