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| DOI： |
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| Water Requirement and Irrigation Schedule of Winter Wheat and Summer Maize in Jinghuiqu Irrigation District |
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SONG Tong, CAI Huanjie, XU Jiatun
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Key Laboratory of Agricultural Soil and Water Engineering in Arid Area，Northwest A&F University，Yangling 712100，China
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| Abstract: |
| In order to seek efficient water-saving irrigation mode under continuous wheat-maize cropping system, field plot trials during continuous cropping patterns were used, by reducing irrigation frequency, the average yield under traditional irrigation system was subjected to comparative. The results indicated that approximate water requirement of winter wheat and summer maize in Jinghuiqu was 410 mm and 400 mm. When the rainfall was 490 mm, planting economic irrigation quota was 305 mm in the whole year, and irrigation volume could be reduced by 8.9%. Under the continuous wheat-maize cropping system, the whole crop yield was 12 010 kg/hm2, increased by 6.2% compared with monoculture. By reducing irrigation in wheat returning green stage and maize sowing stage, water use efficiency could be improved on the basis of yield, which was the better continuous irrigation mode. |
| Key words: winter wheat; summer maize; water requirement; yield; irrigation quota |
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