Effect of Leaf Surface Regulation of Zinc Fertilizer on Absorption of Cadmium, Plumbum and Zinc in Rice (Oryza sativa L.)

The accumulation of heavy metals in rice is bound to affect human health and safety. In order ensure food security, this study explores the effect leaf surface regulation zinc (Zn) fertilizer on safety cadmium (Cd)-plumbum (Pb) polluted farmland. Through field experiments, control treatment was set up, effects yield, Cd Pb concentration different parts zinc, nitrogen, phosphorus potassium brown were studied growing period rice. results showed as follows: (1) Spraying twice or more growth stage could increase yield by 6.77–7.29% compared with blank, which significantly higher than that single spraying a certain stage. (2) After surface, decreased 29.52–56.01% 11.10–28.34%, respectively, CK. Two times can make meet Chinese standard GB 2762-2022, one time standard. (3) Leaf reduce enrichment ability plant parts, coefficient reduced 28.18–55.02%. reducing transport metal roots straw then (4) 18.16–20.68 mg·kg−1, 18.21–34.64% CK, most significant after three times. Meanwhile, also increased By comprehensive analysis, rice, 2762-2022 twice. At same time, it improve feasible has high economic benefits.