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| DOI：10.13522/j.cnki.ggps.2017.0255 |
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| Effects of Different Water and Nitrogen Levels on Nitrogen Use Efficiency under Drip Irrigation |
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ZHANG Xueke, LI Huixia, ZHANG Tan, MA Shaomei
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College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China; Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid Regions, Yinchuan 750021, China; Department of Bioengineering, Yinchuan Institute of Energy, Yongning 750105, China;Ningxia ZhongQing Agriculture Co., Ltd., Yinchuan 750021, China; Ningxia NongKen Group Co., Ltd., Yinchuan, 750021, China
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| Abstract: |
| 【Objective】 Investigate the scientific parameters of water and nitrogen fertilizer in tomato cultivate for sandy soil. 【Method】 A field experiment was set up with two water levels of W1 and W2( decreasing 20% and 40% of water in practice) and two nitrogen fertilizer levels of F1 and F2 (decreasing 25% and 50% of fertilizer in practice) by drip irrigation, and a CK with furrow irrigation and traditional water and nitrogen levels. 【Result】Yield and NUE (nitrogen utilization efficiency) and PFP (partial fertilizer productivity) were higher under drip irrigation than those of CK, but nitrogen leaching and accumulation in soil surface were opposite. Yield and NUE at different water levels under drip irrigation were higher by W1 treatment, and all parameters had no significant difference at different nitrogen fertilizer levels. In conclusion, higher yield and NUE and PFP were happened and less environmental pollution with decreasing 20% water and 50% nitrogen fertilizer under drip irrigation. 【Conclusion】 Therefore, 3.60×103 m3/hm2 water and 400 kg/hm2 nitrogen fertilizer is recommended for sandy soil tomato cultivate practice by drip irrigation in solar greenhouse of Ningxia. |
| Key words: drip irrigation; yield; nitrogen use efficiency; partial fertilizer productivity; tomato |
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