Nutrient management of potato and its after effect on the soil fertility build-up in the lower Gangetic plains of West Bangal

摘要

Field experiment, conducted during the rabi season of 2001-02 at the farmer's field, Kalyani (23.5°N, 89°E), West Bengal having sandy clay loam neutral (pH 7.2) soil, showed that the highest tuber yield (28.1 t/ha) of potato was obtained with 240 kgN, 180 kg each of P_2O_5 and K_2O/ha, which was at par with the tuber yield (27.9 t/ ha) recorded with 120 kg N, 90 kg each of P_2O_5 and K_2O alongwith 10 t FYM/ha. Deletion of K alone from the treatment combination reduced the tuber yield by 14.75% and recorded the highest percentage disease index (42%). The maximum change in total N (+0.013%) and available K_2O (+69.6 kg/ha) status was recorded in treatments receiving 240 kg N, 180 kg each of P_2O_5 and K_2O/ha. In case of P_2O_5, the highest changein status (+21.7 kg/ha) was observed where 120 kg N, 90 kg each of P_2O_5 and K_2O alongwith 10 t FYM/ha were applied. It may be concluded that application of 120 kg N, 90 kg each of P_2O_5 and K_2O alongwith 10 t FYM/ha were found suitable for potato (cv. Kufri Badshah) in the lower Gangetic plains of West Bengal.