Managing irrigation and fertilization for the sustainable cultivation of greenhouse vegetables

文献类型： 外文期刊

第一作者： Li, Jungai

作者： Li, Jungai;Liu, Hongbin;Wang, Hongyuan;Zhang, Yitao;Zhai, Limei;Lei, Qiuliang;Bashir, Muhammad Amjad;Ren, Tianzhi;Luo, Jiafa;Zhang, Xuejun;Liu, Zhaohui;Li, Yan

作者机构：

关键词： Greenhouse vegetable field; Irrigation; Nitrogen rate; Nitrogen leaching; Non-point source pollution

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）

ISSN： 0378-3774

年卷期： 2018 年 210 卷

页码：

收录情况： SCI

摘要： Nitrogen (N) leaching is an important factor that threatens groundwater safety in intensive greenhouse vegetable production regions. However, managing irrigation and fertilization to reduce nitrate leaching has rarely been carried out in long-term experiments. In this study, N leaching in two typical greenhouse vegetable systems (a cucumber-cucumber system in Shandong and a cucumber-tomato system in Ningxia) from 2008 to 2013 investigated should be studied using a lysimeter monitoring method. The total N fertilization rate was 0 to 2508 kg N ha(-1) which included three treatments: no fertilizer (CK: 0 kg N ha(-1)), conventional treatment (CON: Shandong 2508 kg N ha(-1) and Ningxia 2239 kg N ha(-1)) and reduced fertilizer application (RF: Shandong 2164 kg N ha(-1) and Ningxia 1716 kg N ha(-1)). The irrigation amount was 590-2919 mm year(-1) according to vegetable water demand. The results indicated that the annual total N leaching were 344.8 kg ha(-1) (192.3-508.3 kg ha(-1)) in Shandong and 170.7 kg ha(-1) (134.9-203.7 kg ha(-1)) in Ningxia for the CON treatments. Compared with CON treatment, RF significantly decreased ANLL, while simultaneously maintaining the yield and increasing the downward trend of the annual TN leaching factor (ANLF) year by year. Meanwhile, a concomitant annual cost reductions associated with the RF treatment estimated at $187 million USD for Shandong and $20 million USD for Ningxia. ANLL increased linearly with the N input (p < 0.05). More than half of ANLL came from fertilizer N (including chemical and manure fertilizer) under CON treatments, while more than half of ANLL came from soil and water N under RF treatments. The results indicated that mitigation measures for N leaching pollution from greenhouse vegetable fields should consider regulations on irrigation and fertilization.

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