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Greenhouse tomato-cucumber yield and soil N leaching as affected by reducing N rate and adding manure: a case study in the Yellow River Irrigation Region China

文献类型： 外文期刊

作者： Zhao, Ying 2 ; Luo, Jiang-Hang 1 ; Chen, Xiao-Qun 1 ; Zhang, Xue-Jun 1 ; Zhang, Wei-Li 2 ;

作者机构： 1.Ningxia Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Yinchuan 750002, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

关键词： Greenhouse vegetable;Yield;Irrigation;Fertilizer N application;Manure;Leachate;Soil N leaching

期刊名称：NUTRIENT CYCLING IN AGROECOSYSTEMS （ 影响因子：3.27； 五年影响因子：3.767 ）

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收录情况： SCI

摘要： The effect of reducing N rate fertilization and manure addition on greenhouse vegetable yields and soil N leaching was studied in a greenhouse tomato-cucumber rotation system in the Yellow River Irrigation Region of Ningxia Plain, North China. The treatments were: 1-no fertilizers, 2-conventional fertilization, 3-reduced fertilizer application, and 4-reduced fertilizer application+regulation of soil C/N ratio applied by the high C/N ratio of dairy manure. The results indicated that reduced fertilizer application in tomato and cucumber season had no significant influence on vegetable yield comparing with control. The amounts of leachate had no significant differences under all fertilizer treatments at the same investigated period. In comparison with conventional fertilization, both total N and NO3-N leaching decreased in the low fertilizer treatments. The cumulative total N and NO3-N leached from fertilizers N were less than 9% during the tomato-cucumber rotation system. NO3-N was the predominant form of leaching N, represented about 70% of total N in the leachate. Soluble organic N represented 14.7-33.3% of total N leached. Vegetable yields did not increase significantly as applied N rates increased. However, soil N leaching increased largely with N rates. Reducing fertilizer N rate while adding dairy manure regulated soil C/N ratio could be appropriate fertilization practices for reducing soil N leaching and achieving high vegetable yields in the greenhouse systems.

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