Zinc oxide nanoparticles enhanced rice yield, quality, and zinc content of edible grain fraction synergistically

作者：Kailiang Mi, Xijun Yuan, Qianyue Wang, Canping Dun, Rui Wang, Shuo Yang, Yanju Yang, Hongcheng Zhang, Hongcheng Zhang, Haipeng Zhang, Haipeng Zhang · 发表于：Frontiers in Plant Science · 年份：2023 · DOI：10.3389/fpls.2023.1196201 · 被引用次数：58 · 研究领域：Plant Micronutrient Interactions and Effects、Magnesium in Health and Disease、Heavy metals in environment

Zinc oxide nanoparticles (ZnO NPs) have been widely used in agriculture as a new type of Zn fertilizer, and many studies were conducted to evaluate the effect of ZnO NPs on plant growth. However, there are relatively few studies on the effects of application methods and appropriate dosages of ZnO NPs on rice yield, quality, grain Zn content, and distribution. Therefore, in the 2019 and 2020, field trials were conducted with six ZnO NPs basal application dosages of no ZnO NPs, 3.75 kg hm −2 , 7.5 kg hm −2 , 15 kg hm −2 , 30 kg hm −2 , and 60 kg hm −2 , and the effects of ZnO NPs application on rice yield, quality, grain Zn content, and distribution were investigated. The results demonstrated that applying ZnO NPs in Zn-deficient soils (available Zn < 1.0 mg kg −1 ) increased rice grain yield by 3.24%–4.86% and 3.51%–5.12% in 2019 and 2020, respectively. In addition, ZnO NPs improved the quality of rice by increasing the head milling rate, reducing chalky grain percentage, and increasing the taste value and breakdown of rice. In terms of Zn accumulation in rice, ZnO NPs application significantly increased the Zn content in both milled rice and brown rice, compared with no Zn treatment, in 2019 and 2020, Zn content in milled rice significantly increased by 20.46%–41.09% and 18.11%–38.84%, respectively, and in brown rice significantly increased by 25.78%–48.30% and 20.86%–42.00%, respectively. However, the Zn fertilizer utilization gradually decreased with increasing ZnO N...