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| Effects of drip irrigationamount on water consumption and growth of maize |
| WANG Weijie1,2, ZHANG Yanqun2, QI Mingdi1,2, WANG Chuanjuan2, WU Zhongdong1*, WANG Jiandong2 |
| 1. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China;2. Institute of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 1000481, China |
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Abstract In order to improve the water use efficiency of maize, tap the potential of maize yield increase in northeast China, and seek suitable irrigation methods, the effects of different drip irrigation scheduling on water consumption, plant growth, dry matter accumulation, yield and water use efficiency(WUE)of maize in typical areas of western Heilongjiang Province were analyzed through field experiment. Results show that the WUE of the low irrigation treatment(50% of full irrigation amount)is increased by 16.4%, 8.7% and 14.1%, respectively, compared with high irrigation treatment(full irrigation amount), medium irrigation treatment(70% of full irrigation quantity)and traditional rain-fed treatment(CK).The plant height and stem diameter of maize are increased by high irrigation treatment, however, the leaf area index of low irrigation treatment and middle water treatment is larger, which is beneficial to the maintenance of chlorophyll.The distribution of dry matter to seeds is not conducive by high irrigation treatment. Maize with low irrigation treatment has better ear characte-ristics. The economic yield of low irrigation treatment is 7.7%, 5.2% and 24.8% higher than that of high, medium irrigation treatment and rain-fed control, respectively. Low drip irrigation scheduling can be recommended as a reference indicator for maize drip irrigation amount in typical areas of western Heilongjiang Province.
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Received: 24 July 2018
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