Effect of Zinc and Boron Fortified Konkan Annapurna Briquettes (KAB) on Yield, Nutrient Uptake by Brinjal, Nutrient Use Efficiency and Soil Properties

Abstract

Improving nutrient use efficiency is a critical challenge in agriculture, where current averages are low (30-35%). This study, conducted over two consecutive rabi seasons (2021-22 and 2022-23), examined the impact of zinc and boron-fortified Konkan Annapurna Briquettes (KAB) on brinjal yield, nutrient uptake, and soil health in the Konkan region of Maharashtra. The experiment included three levels of recommended nitrogen doses - 100%, 80%, and 60% - applied via KAB, with and without zinc and boron fortification, as well as comparisons with traditional straight fertilizers. Results indicated that the highest fruit yield (314.27 and 319.90 q ha-1) and increased nutrient uptake of nitrogen (N), phosphorus (P), zinc (Zn), and boron (B) were achieved with 100% nitrogen applied through KAB fortified with 2 kg B and 3 kg Zn per hectare, closely followed by the 80% nitrogen treatment with the same fortification. Additionally, the study observed notable improvements in nitrogen, zinc, and boron use efficiency, ranging from 32-38%, 22-32%, and 32-41%, respectively, when using briquettes compared to straight fertilizers. This nutrient delivery method also contributed to sustainable soil fertility, demonstrating that fortified briquettes could significantly enhance nutrient efficiency and productivity in brinjal cultivation.