Effect of Nursery Nutrient Management on Plant Survival, Physiological Traits and Yield of Rice (Oryza sativa) Genotype Swarna-Subl Under Submerged Rainfed Lowland Ecosystem

摘要

An experiment was conducted to characterize nursery nutrient management by assessing morpho-physiological traits and yield attributes at different crop growth stages for improving submergence tolerance in Swarna-Subl, a mega rice cultivar for Southeast Asia. Seven nutrient treatment combinations were applied at two different stages, one at after 10-day seeding and second at the time of transplanting (25-day-old seedlings) in cemented submergence tank. Fifteen days after transplanting, the plants weresubmerged for 13 days. Maximum plant height after submergence and at recovery was observed with T_5 (N_0:P_o:K_(40)). In leaves, 'N,' 'P' and 'K' content was highest in Ti (N_(40)P_(40)K_(40)) followed by T6 (N_0:P_(6o):K_(4o)) and then with T3 (N0:P_(4