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| DOI：10.13522/j.cnki.ggps.2019234 |
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| Effect of different irrigation method on sandy soil moisture and yield of wolfberry |
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LIU Xiaoli, MA Lihui, YAN Xiaoying, YANG Ronghui, ZI Hao
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1.College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, China；2.Green Farm Technology Ltd, Shenmu 719300, China; 3.Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China; 4.College of Resources and Environment, Northwest A & F University, Yangling 712100, China; 5.Agricultural Comprehensive Development Ltd of Deyuan, Shenmu 719300, China
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| Abstract: |
| 【Objective】We aimed to determine the effect of circular multi-point source drip irrigation in rhizosphere.【Method】We studied the vertical distribution range of soil wetting front, soil moisture and yield of wolfberry under different irrigation methods of surface drip irrigation, bubble irrigation and circular multi-point source root drip irrigation using soil core method in Shenmu county located in north Shaanxi province.【Result】 69% of soil wetting zone distributed in 0～20 cm soil layer with surface irrigation, 72.2% distributed in main root layers with bubble irrigation, while the whole soil wetting zone distributed in main root layers with circular multi-point source root drip irrigation, respectively. The wolfberry yield had increased by 2 075 kg/hm2, 3 145 kg/hm2 and 4 150 kg/hm2, water use efficiency had increased by 22.4%, 41.9% and 60.2%, net income had increased by 81.2%, 126.3% and 193.1%, water economic benefits had reached 11.5, 13.3 and 15.0 yuan/m3 with surface drip irrigation, bubble irrigation and circular multi-point source root drip irrigation compared with those without irrigation.【Conclusion】The soil moisture wetting volume of circular multi-point source root drip irrigation is more suitable for economic forest in sandy soil, which is an effective technical measure to reduce surface evaporation and deep percolation, and it could be applied widely in economic forest in sandy soil. |
| Key words: circular multi-point source drip irrigation; surface drip irrigation; bubble irrigation; soil moisture; wolfberry |
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