EFFECT OF DIFFERENT FERTILITY LEVELS AND NUTRIENT UPTAKE BY DROUGHT TOLERANT RICE GENOTYPES UNDER RAINFED CONDITION

Abstract

An ongoing field experiment was conducted to study the effect of different fertility levels on N, P, K and micro
nutrient uptake by drought tolerant rice genotypes under rain fed condition at IGKV, Raipur.The Soil of experimental
field’s soil exhibited neutral reaction (pH 7.34), EC 0.26 (dSm-1), medium status of organic C (0.58%), low in
available N (273 kg ha-1), medium in P (14.78 kg ha-1), high in K status (616 kg ha-1) and sufficient level in
micronutrients (Fe, Mn, Cu, & Zn).Result showed that the overall average nutrients use efficiencies for N, P and
K were recorded as 35.69, 18.41 and 112.75 per cent, respectively. Rice genotype R-RF-65 registered the
nutrients use efficiencies for N, P and K ranged as 43.55-35.65, 23.65-20.15 and 165.60-92.50, respectively.
Nutrient use efficiencies were observed higher at low fertility level and vice versa. Potassium use efficiency
showed very high values which was due to less crop response to the applied K fertilizer. Most of the genotypes
tested for their nutrient use efficiencies performed better than local check. The crop season was favorable and no
water stress occurred during entire period which favored the genotypes to perform their potential level.