Agronomic Performance of Black Rice under an Organic Ecosystem of North East India

The research on potash management in North East India aims to enhance agronomic performance of black rice in organic habitats through SRI-based potassium management, promoting sustainable agriculture, food security and biodiversity. It underscores the crop's cultural, nutritional and economic importance while offering farmers sustainable production strategies.

To assess the effects of potash management strategies on organic black rice under system of rice intensification (SRI), a field experiment was carried out at Research Farm of Assam Agricultural University, Jorhat, during the kharif seasons of 2019 and 2020. The experiment included twelve distinct treatments with three replications, each arranged in a randomized block design.

The morpho- physiolo, phenological and insect pest resistance were notably influenced by different organic potash management practices under system of rice intensification. From the result it was found that the highest leaf area duration, no of tillers, AGR for dry matter (g day^-1 plant^-1), CGR) for dry matter (g m^-2 day^-1), Phenological attributes, with application of RDK through banana pseudo stem vermicompost with combination of mustard oil cake + 20 kg ha^-1) T₈. In case of AGR for plant height (cm plant^-1 day^-1) was more in T6 (RDK through azolla incorporation + mustard oil cake + 20 kg ha^-1). Early flowering and maturity were recorded in treatment T₈ with application of RDK through banana pseudo stem vermicompost along with 20 kg ha^-1 mustard oil cake. The incidence of insect pest was also observed low under treatment T₈i.e., application of RDK through banana pseudo stem vermicompost + with mustard oil cake + 20 kg ha^-1) and highest pest incidence was found under T₁ (Control).