Author(s):

Manish Raj, Rahul Kumar, Mohammad Rashid Ashrafi, Kanhaiya Lal, Mainak Ghosh, Sarita

Abstract: The present study was carried out on aerobic rice during 2019-20 at research farm of Bihar Agricultural University, Sabour, Bhagalpur (Bihar) to study the impact of different potassium (K) management practices on K status of soil, profitability and productivity of aerobic rice. The study comprised 10 treatments in Randomized block design (RBD) and replicated thrice. The aim of the study was to find the suitable potassium dose for getting optimum productivity and higher profitability. Among all treatments K₈ (KSB inoculated with 150% RDK at basal) and K₅ (150% RDK incorporation with two equal split) performed better in terms of productivity and profitability of rice and 60 kg K₂O (150% RDK) is the new recommendation of K in the Indo Gangetic plain to obtain optimum yield and monetary value. Split application and KSB (Frateuria aurantia) ensure the continuous supply of K throughout the crop cultivation and also reduces the K losses. K management in DSR become a challenging due less availability of water so most of K has fixed in the inter layer clay lattice. K is a crucial macronutrient that plays an important role in the yield attributes components apart from this, it regulates the ionic balance, opening and closing of stomata and also act as co factor to activate the more than 60 enzymes.

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