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| DOI：10.13522/j.cnki.ggps.2016.0120 |
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| Application of Subsurface Drip Irrigation to Maize Field in Aeolian Sandy Soil |
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DOU Chaoyin, MENG Weizhong, TONG Wei, CHEN Wei, YAN Weichen
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1. School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou 225009, China; 2. Water Conservancy and Hydropower Science Research Institute of Liaoning, Shenyang 110003, China
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| Abstract: |
| 【Objective】 Subsurface drip irrigation has been developed into an efficient technique for water-saving irrigation in arid and semiarid regions, and the purpose of this work is to examine its feasibility for aeolian sandy soil. 【Method】 We took maize as the model plant and conducted a field experiments with three irrigation methods: subsurface drip irrigation (SD), mulched-drip irrigation (MD) and rain-fed without irrigation (CK). The growth and yield of the maize in each treatment were measured. 【Result】 Under SD, the irrigated water was mainly reserved in the soil below 20 cm, soil water content in which remained 6% or above for a significant period. In the early growth stage, plant height, stem diameter and LAI were slower under SP than under MD. With the plant growing, however, the difference in plant height and LAI between the two treatments disappeared. In the late growth stage, the withering of leaf was delayed in SD treatment. The yield and water use efficiency of SD were 7.5 t/hm2 and 1.9 kg/m3 respectively, 0.8 t/hm2 and 0.3 kg/m3 less than those of MD, but 126.4% and 73.6% higher than those of CK. The differences between SD and MD were insignificant, but SD and MD differed significantly from CK. 【Conclusion】 Considering its ecological and economic benefits, SD is suitable for use in such soils. |
| Key words: irrigation; water use efficiency; maize; yield; leaf area index |
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