Sustainable Integrated Nutrient Management Practices for Traditional Rice Production in Wayanad, Kerala: Yield and Quality Implications

Rice cultivation in Wayanad, Kerala, can greatly benefit from Integrated Nutrient Management (INM) practices that incorporate organic amendments. Traditional rice varieties in the region, known for their nutritional and cultural value, often face productivity constraints due to unsustainable input use. This study aimed to evaluate the potential of INM strategies to enhance yield and quality while promoting sustainable farming practices.

The research was conducted during the Kharif seasons of 2022 and 2023 using a split-plot design. Four traditional rice varieties-Kothampalarikkayama (V1), Rakthashali (V2), Njavara (V3) and Chennellu (V4)- were studied under seven different INM treatments. These treatments combined green manuring, farmyard manure (FYM) and varying levels of chemical fertilisers, including a treatment with 75% of the recommended nitrogen dose. Parameters such as panicle number, grain filling, kernel length and protein content were measured to assess performance.

INM practices integrating organic inputs with reduced chemical fertilisers significantly improved soil health and crop performance. Kothampalarikkayama (V1) exhibited the highest yield and superior panicle traits. The most effective INM treatment was green manuring plus FYM with 75% recommended nitrogen-resulted in increased panicle number, better grain filling and improved kernel length and protein content. These outcomes highlight the potential of INM for enhancing both productivity and sustainability in traditional rice cultivation systems.