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首页> 外文期刊>The Science of the Total Environment >Alternate wetting and drying irrigation and phosphorus rates affect grain yield and quality and heavy metal accumulation in rice
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Alternate wetting and drying irrigation and phosphorus rates affect grain yield and quality and heavy metal accumulation in rice

机译：交替的润湿和干燥灌溉和磷率影响水稻中的籽粒产量和质量和重金属积累

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摘要

Alternate wetting and drying (AWD) irrigation was reported to increase rice root activity and element bioavail-ability, which results in enhanced heavy metal (HM) absorption and this HM ends up in rice grains. HM uptake was also affected by the levels of phosphorus (P) fertilizer application. HMs enter food chain via consumption of rice grains and cause health problems. In this study, we compared the differences in grain yield, grain quality, water use efficiency (WUE), partial factor productivity of applied P (PFPp), HM contents in different tissues and transfer coefficient (TC) of HMs under a combination of treatments involving two irrigation regimes (continuous flooding (CF) and AWD irrigation) and three P fertilizer application levels (0.4 g P_2O_5/kg soil, HP; 0.2 g P_2O_5/kg soil, MP; 0 g P_2O_5/kg soil, LP). Compared to CF, AWD irrigation increased grain yield (without reducing grain quality), decreased irrigation water use and the number of irrigation events needed and improved WUE and PFPp at all three P fertilizer application levels, while the accumulation of HMs in grains increased when more P was applied. This accumulation of HMs in grains thus requires immediate attention to the level of P fertilizer application and its optimization in water-saving AWD irrigation to minimize grain HM content.
机译：据报道，替代润湿和干燥（AWD）灌溉以增加水稻根系活性和元素生物淘能力，这导致增强的重金属（HM）吸收，并且该HM最终含有水稻颗粒。 HM摄取也受到磷（P）肥料施用水平的影响。 HMS通过稻米消耗进入食物链并引起健康问题。在本研究中，我们将谷物产量，粒度，水使用效率（WUE），应用P（PFPP），不同组织中的HM含量的部分因素生产率，HM的组合的颗粒率和转移系数（TC）的差异进行了比较涉及两次灌溉制度（连续洪水（CF）和AWD灌溉）和三种P肥料应用水平（0.4g P_2O_5 / kg土壤，HP; 0.2g P_2O_5 / kg土壤，MP; 0 g P_2O_5 / kg土壤，LP）。与CF相比，AWD灌溉增加了谷物产量（不降低籽粒质量），在所有三种P肥料应用水平下降低灌溉用水和所需的灌溉事件数量和改善的WUE和PFPP，而谷物中HMS的积累则增加p是应用的。因此，这种HMS中HMS的积累需要立即关注P肥料应用的水平及其在节水AWD灌溉中的优化，以最大限度地减少谷物HM含量。

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  • 来源
    《The Science of the Total Environment》 |2021年第15期|141862.1-141862.8|共8页
  • 作者

    Tao Song; Debatosh Das; Qijuan Hu; Feng Yang; Jianhua Zhang;

  • 作者单位

    Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen 518057 China;

    Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen 518057 China;

    Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen 518057 China;

    Shenzhen Research Institute The Chinese University of Hong Kong Shenzhen 518057 China;

    Department of Biology Hong Kong Baptist University Kowloon Hong Kong School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Shatin Hong Kong;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Rice; Yield; Grain quality; Heavy metal; Transfer coefficient; Water-saving irrigation;

    机译：米;屈服;粮食品质;重金属;转移系数;节水灌溉;

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