An Estimate of Certain Chelated, Non-Chelated Zinc Sources and Levels on Zinc Use Efficiency, Availability and Yield of Rice Grown in Texturally Different Soils

This study was planned to estimate the performance of three zinc fertilizers [Zn sulfate heptahydrate (non-chelated), Zn- EDTA and Zn-humate (chelated)] at four levels (0, 2.5, 5.0, 7.5 mg kg-1) on use efficiency, availability crop productivity with rice. Field trials were conducted in clay loam sandy textured soils using factorial randomized block design (FRBD) replications. Data recorded yield, Zn uptake, DTPA-Zn, uptake efficiency (ZnUPE), utilization (ZnUTE), (ZnUE), fertilizer (FZnUPE), (FZnUTE) (FZnUE). Among sources, highest grain (5307, 5545 kg ha-1) straw (6691, 6913 DTPA-Zn both soils, respectively. levels, invariably sources (5556, 5771 (7029, 7120 yield obtained 5 kg-1 Zn, while registered DTPA- soil, Our results identified that increased ZnUPE, ZnUTE, ZnUE. Addition 2.5 FZnUPE FZnUE, 5.0 FZnUTE soil textures. Amongst humate higher ZnUE its components. The concluded chelated performed well than non-chelated (Zn sulphate heptahydrate), more effective experimental soils.