Biogeoaccumulation of zinc in hybrid rice (Oryza sativa L.) in an Inceptisol amended with soil zinc application and its bioavailability to human being

Authors : Kiran Kumar MOHAPATRA, Satish Kumar SİNGH, Abhik PATRA, Surendra Singh JATAV, Vishnu D. RAJPUT, Victoria POPOVA, Olesya PUZİKOVA, Olga NAZARENKO, Svetlana SUSHKOVA

Pages : 184-197

Doi:10.18393/ejss.1057928

View : 13 | Download : 8

Publication Date : 2022-07-01

Article Type : Research Paper

Abstract :Soil Zn amended is an efficient agronomical Zn biofortification approach in rice. However, it is still need to know if higher rate of Zn over recommended dose can influence other essential nutrient uptake, high accumulation of Zn in soils and health risk for human consumption. This study was conducted by taking ten treatments insert ignore into journalissuearticles values(T1: control, T2: RDF, T3: RDF + 1.25 mg kg-1, T4: RDF + 2.5 mg kg-1, T5: RDF + 3.75 mg kg-1, T6: RDF + 5 mg kg-1, T7: RDF + 6.25 mg kg-1, T8: RDF + 7.5 mg kg-1, T9: RDF + 8.75 mg kg-1, T10: RDF + 10 mg kg-1); on hybrid rice in Zn insert ignore into journalissuearticles values(1.20 mg kg-1); enriched soil. The findings have shown that 6.25 mg kg-1 Zn application significantly increased crop growth and grain concentrations of N, K, Zn, Cu and Fe by 71.4, 125, 78.9, 28.5 and 2.4%, respectively. Nutrient harvest index was significantly affected by ranged between 29.1–36.4%. Application of Zn at 6.25 mg kg-1 insert ignore into journalissuearticles values(T7); recorded the highest Zn concentration in grain insert ignore into journalissuearticles values(28.2 mg kg-1); and bioavailability of the fortified Zn insert ignore into journalissuearticles values(2.05 mg Zn day-1);. The lowest phytatic acid concentration in grain was recorded in T8 insert ignore into journalissuearticles values(RDF + Zn at 7.5 mg kg-1); and after that a significant increase was observed. Transfer coefficient was inversely behaving with Zn application and ranged between 6.03–18.0 grain. The average daily intake of Zn was ranged between 0.075–0.118 mg-1 kg-1 day. Across different treatments the Zn build-up factor, geo-accumulation index and soil enrichment factor was ranged between 0.98–4.90, -0.61–1.70 and 0.24–1.82, respectively in post-harvest soil. In conclusion, agronomic biofortification of Zn through soil applications at 6.25 mg Zn kg-1 was a sustainable way to improving growth and grain Zn, N, K, Cu and Fe uptake of hybrid rice to meet human recruitment.
Keywords : Nutrient harvest index, rice, zinc, zinc balance sheet, Zn build up factor