| 引用本文: | 张学科,李惠霞,张 倓,等.滴灌条件下水氮减量对番茄氮素利用效率的影响[J].灌溉排水学报,2018,37(3):45-50. |
| ZHANG Xueke,LI Huixia,ZHANG Tan,et al.滴灌条件下水氮减量对番茄氮素利用效率的影响[J].灌溉排水学报,2018,37(3):45-50. |
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| 摘要: |
| 【目的】探究滴灌条件下砂质土壤栽培番茄水肥用量参数。【方法】以沟灌条件下习惯水、氮用量为对照（CK），在滴灌条件下分别将灌水量减少20%（W1）和40%（W2）、施氮量减少25%（F1）和50%（F2）进行田间试验。【结果】与CK相比，滴灌条件下产量、氮素吸收效率及偏生产力均显著高于CK，CK氮素淋溶与表层氮累积均较大；滴灌条件不同灌水量下，W1处理氮素利用效率、产量均较高；不同施氮量下，产量、偏生产力无显著差异。由此可见，滴灌条件下减少20%的灌水量和减少50%的施氮量具有较高的产量、氮素吸收效率及偏生产力，对环境造成的硝酸盐污染也较小。【结论】宁夏砂质土壤日光温室种植番茄，建议在滴灌方式下控制灌水量为3.60×103 t/hm2、施氮量为400 kg/hm2。 |
| 关键词: 滴灌； 产量；氮肥利用率； 偏生产力； 番茄 |
| 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 |
