Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Bull Environ Contam Toxicol. 2020 Sep;105(3):428-432. doi: 10.1007/s00128-020-02949-z. Epub 2020 Aug 1.
The accumulation of Cd and Pb in rice grains poses a potential threat to human health, which is a subject of increasing concern across the globe. We examined the effect that foliar spraying of Zn-ethylenediaminetetraacetate (Zn-EDTA) (0.3% and 0.5% w/v) during the early-grain filling stage has on rice grain yield and Cd, Pb, Zn and Fe contents in rice tissues via a field experiment. The grain yield significantly decreased with the foliar application of 0.5% Zn-EDTA. In rice grain, foliar spraying of 0.5% Zn-EDTA significantly decreased the Cd and Pb contents, but increased the Zn and Fe contents. The main reasons for the decrease in the Cd and Pb content in grain were the inhibition of Cd and Pb by roots and the increased Fe content in grain via Zn-EDTA application. The foliar spraying of Zn-EDTA decreased the grain yield and Cd and Pb contents, while increased the Zn and Fe contents in grains.
稻米中 Cd 和 Pb 的积累对人类健康构成潜在威胁，这是全球日益关注的问题。我们通过田间试验研究了在灌浆早期叶面喷施 Zn-乙二胺四乙酸（Zn-EDTA）（0.3%和 0.5%w/v）对稻米产量和稻米组织中 Cd、Pb、Zn 和 Fe 含量的影响。叶面喷施 0.5% Zn-EDTA 会显著降低稻谷产量。在稻米中，叶面喷施 0.5% Zn-EDTA 显著降低了 Cd 和 Pb 的含量，但增加了 Zn 和 Fe 的含量。稻谷中 Cd 和 Pb 含量降低的主要原因是根部对 Cd 和 Pb 的抑制作用，以及 Zn-EDTA 施用增加了稻谷中的 Fe 含量。叶面喷施 Zn-EDTA 降低了稻谷产量和 Cd、Pb 含量，同时增加了稻谷中 Zn 和 Fe 的含量。
