Vol. 10, Issue 1 (2021)

Author(s):
Rudolph B Nongkhlaw, Dr. AK Bijaya Devi, K James Singh, Dr. N Okendro Singh and Dr. S Jekendra Singh

Abstract:
A field investigation was conducted at College of Agriculture, CAU, Imphal, Manipur, India during session 2019-20. The study consisted of 16 treatment combinations with 4 levels of Nitrogen (0, 35, 50 and 65 kg/ha of N respectively) and 4 levels of Potassium (0, 35, 50, 65 kg/ha of K respectively) with 3 replications in FRBD on variety NFSP-1. Effect of different levels of N and K on different physiological parameters are as follows. Higher level of N and K gave higher Plant Growth Efficiency or PGE (%), Net Assimilation Rate or NAR (g/m²/day), Crop Growth Rate or CGR (g/m²/day) and Relative Growth Rate or RGR (g/g/day) but with a declining trend towards maturity stage. As for Harvest Index (HI), maximum dose of N and second highest dose of K gave highest HI. Interaction between N and K showed significant differences between the treatments pertaining to PGE, NAR and HI only.