Influence Of Varietal Duration And Nitrogen Fertilization In Augmenting Micronutrient Uptake And Yield Of Rice

Abstract

Lack of micronutrients in diet lead to health anomalies in human, to solve which diet-based availability can be looked upon. The goal of the current research is to ascertain how micronutrient uptake and yield of boro rice are influenced by the duration of the variety and graded doses of nitrogen fertilization. The field trial was conducted in the boro season of 2022 at Bidhan Chandra Krishi Viswavidyalaya, Gayeshpur, Nadia in a thrice replicated split plots with nitrogen fertilizer levels (0, 50, 100, 150 kg ha-1) in main plot and varieties (short duration-Satabdi, medium duration-Pratikshya and long duration-Swarna masuri) in sub-plots. At both maximum tillering and harvest stage, increase in nitrogen fertilization levels significantly increased the uptake of Zn, Cu, Fe and Mn and biomass yield significantly. However, while Fe and Mn concentrations were highest for N application at 150 kg ha-1, N application at 100 and 150 kg ha-1 statistically registered at par Zn and Cu values. Varietal influence on grain and straw yield as well as micronutrient uptake in harvest may be linked to their life cycle pattern where Partikshya considerably outperformed short duration Satabdi variety. Worst performance of Swarna Masuri variety may possibly be attributed to the inherent varietal characteristics and exposure to terminal moisture and heat stress at the months of May and June. Judicious management of nitrogen fertilizer may be a viable non- traditional approach for micronutrient nutrition in rice.