Foliar Application of Zn-EDTA at Early Filling Stage to Increase Grain Zn and Fe, and Reduce Grain Cd, Pb and Grain Yiel
- PDF / 647,813 Bytes
- 5 Pages / 595.276 x 790.866 pts Page_size
- 58 Downloads / 182 Views
Foliar Application of Zn-EDTA at Early Filling Stage to Increase Grain Zn and Fe, and Reduce Grain Cd, Pb and Grain Yield in Rice (Oryza sativa L.) Zhongyuan Wang1,2 · Hui Wang1,3 · Chao Xu1 · Guanghui Lv1 · Zunchang Luo4 · Hanhua Zhu1 · Shuai Wang1 · Qihong Zhu1 · Daoyou Huang1 · Baizhong Li1 Received: 15 April 2020 / Accepted: 19 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract 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. Keywords Cadmium · Lead · Zn-EDTA · Foliar spray · Rice Agricultural soil contaminated with Cd and Pb has become a global environmental problem because of the potential toxicity of these elements to plants and humans (Zhao et al. 2015). Mining, smelting, electroplating, and agriculture have resulted in the excessive accumulation of Cd and Pb in agricultural soils, particularly in eastern and southern China (Zhao et al. 2015; Yang et al. 2018). More than half the world’s population depends on rice as their staple food, which is widely cultivated in eastern and southern China, Zhongyuan Wang and Hui Wang have contributed equally to this work. * Chao Xu [email protected] 1
Key Laboratory for Agro‑ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
4
Soil and Fertilizer Institute of Hunan Province, Changsha 410125, China
where numerous paddy soils have been contaminated by Cd and Pb (Zhao et al. 2015). As Cd and Pb enter the human body through rice consumption (Yang et al. 2018), their accumulation in rice grain has caused significant public concern. Therefore, there is an urgent need to develop effective and low-cost technologies to reduce the Cd and Pb contents in rice grains. Zinc interacts with the soil–plant system in a similar manner to Cd and Pb. Several studies have indicated an antagonistic effect between Zn and Cd or Pb in rice grains (Fahad et al. 2015; Lv et al. 2018; Wang et al. 2018a, b). Hence, Zn fertilization can reduce the absorption and a
Data Loading...
