Efficient nutrient management technologies for increased rice productivity

Abstract

Efficient nutrient management is crucial for optimizing rice productivity, ensuring environmental sustainability and resource conservation. Over the years, several efficient nutrient management technologies have been designed to enhance rice productivity. The general recommended dose (GRD) of fertilizers serves as a foundational guideline for nutrient application, but its effectiveness is significantly improved when combined with site-specific practices. Soil test-based fertilizer application is a key technology that provides tailored nutrient solutions by analyzing soil conditions and deficiencies, thereby promoting precise and efficient fertilizer use. Integrated nutrient management (INM) further enhances productivity by integrating organic and inorganic fertilizers, improving soil health and structure, and fostering sustainable agricultural practices. The leaf colour chart (LCC) offers a practical tool for managing nitrogen (N) application by correlating leaf colour intensity with N levels, thereby optimizing fertilizer N use and reducing environmental impact. For salt-affected soils, which present unique challenges, strategies such as applying gypsum to alkaline soils and managing irrigation practices are vital to mitigate salinity impacts and improved soil fertility. These integrated approaches not only enhance nutrient uptake and rice yield, but also contribute to sustainable farming by reducing input costs and minimizing negative environmental effects.