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首页> 外文期刊>Research on Crops >Studies on foliar application of zinc as bio-fortification strategy to enhance grain zinc content in rice [Oryza sativa L.) genotypes
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Studies on foliar application of zinc as bio-fortification strategy to enhance grain zinc content in rice [Oryza sativa L.) genotypes

机译：锌作为生物强化策略提高水稻籽粒锌含量的生物强化策略研究[Oryza Sativa L.）基因型研究

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摘要

Zinc (Zn) deficiency is a concern for nearly half of the world population. Biofortification through foliar Zn application is an approach to reduce human Zn deficiency. Knowledge available on effect of foliar applied zinc towards biofortification efficiency and bioavailability of rice grain is limited. Pot experiment with rice was conducted to study the effect of foliar applied zinc along with soil application of recommended dose of N : P : K : Zn for rice. Two contrasting groups of four cultivars each with respect to seed zinc based on previous screening were selected (high seed zinc types and low seed zinc types). Zinc was applied in the form of ZnS04.7H20 foliar application at vegetative stage and at reproductive stage in three different doses (recommended dose, 10% lower than recommended dosage and 10% higher than recommended dosage). Results suggest that foliar zinc application is effective in enhancing grain zinc when applied with recomrriended dose of soil zinc fertilizer irrespective of inherent zinc acquisition capacity by roots. Stem had higher Zn accumulation at 65 DAS indicating translocation of foliar applied zinc. At 50% panicle initiation stage, there was higher zinc in leaf compared to stem and developing grain implying Zn movementfrom stem to seed. Zn analyzed at different stages of grain filling till harvest showed an increase in Zn content both in high and low zinc types. Higher seed Zn was observed in long duration varieties. Using long duration varieties for foliar biofortification could be an effective strategy to overcome Zn deficiency.
机译：锌（Zn）缺乏是世界近一半人口的担忧。通过叶面Zn应用生物化是一种降低人类Zn缺乏的方法。叶面施加锌效果效果的知识有限。进行了水稻的盆栽试验，研究叶面涂覆锌的作用以及土壤应用于推荐剂量的N：K：Zn米。选择基于先前筛选的种子锌的两个形成的四种卷曲组（高种子锌类型和低种子锌类型）。锌以ZnS04.7H20叶面申请的形式应用于营养期，并以三种不同剂量的生殖阶段（推荐剂量，低于推荐剂量的10％，比推荐剂量高10％）。结果表明，叶面锌应用在涂有重新升高的土壤锌肥料时有效增强谷物锌，而无论根系固有的锌饲料收购容量如何。茎在65 das具有较高的Zn积累，表明叶面涂覆锌的易位。在50％的穗起始阶段，与茎和显影晶粒相比，叶片中含有较高的锌，其暗示Zn运动从茎上种子。在谷物填充的不同阶段分析Zn，直至收获显示高锌类型和低锌类型的Zn含量增加。在长期品种中观察到更高的种子Zn。使用叶面生物缺陷的长持续时间变化可能是克服Zn缺乏的有效策略。

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