Polyhalite a new potassium-based fertilizer

16              

Polyhalite a new potassium-based fertilizer

Rupal Pariyar

Department of Horticulture, Sikkim University

Corresponding email : rupalpariyar8806@gmail.com

Abstract

Polyhalite has emerged as a promising multi-nutrient fertilizer in the context of increasing global food demand and the need for sustainable agricultural practices. Unlike conventional fertilizers that primarily supply nitrogen, phosphorus, and potassium, polyhalite provides a balanced combination of potassium (K), calcium (Ca), magnesium (Mg), and sulfur (S) in a single application. Its low chloride content, low salt index, and slow-release characteristics make it particularly suitable for improving soil fertility while minimizing environmental risks such as nutrient leaching and salinity stress. Additionally, polyhalite is a naturally occurring mineral that requires minimal processing, contributing to a lower carbon footprint and making it compatible with organic farming systems. Despite these advantages, its relatively low potassium concentration and limited solubility may restrict its immediate effectiveness during critical crop growth stages. Current research highlights its potential to enhance nutrient use efficiency, crop yield, and soil health; however, significant gaps remain regarding long-term impacts, optimal application strategies, and comparisons with conventional fertilizers. Therefore, further studies are essential to fully exploit polyhalite’s role in sustainable nutrient management and agricultural productivity.