Effect of splits of nitrogen application on yield and uptake of irrigated rice

Abstract

A field experiments was conducted during kharif 2016 to study the effect of splits of nitrogen application on yield and uptake on irrigated rice crop at Agricultural Research Station, Bapatla. The experiment was conducted in randomized block design on sandy clay loam soil with six treatments replicated four times. The treatments consisted of control i.e no nitrogen application, 1/2N at maximum tillering stage+1/2 N at panicle panicle initiation stage, 1/2 N at basal+1/4 N at maximum tillering stage+1/4 N at panicle initiation stage, 1/3 N at basal+1/3 N at maximum tillering stage+1/3 N at panicle initiation stage, 1/4 N at basal+1/4 N at maximum tillering stage+1/4 N at panicle initiation stage + 1/4 N at heading stage, 1/3 N at basal+1/3 N at maximum tillering stage+1/3 N at panicle initiation stage + extra 1/3 N at heading stage. The results shown that significantly the highest grain yield (5525 kg/ha), straw yield (7750 kg/ha) and nitrogen uptake (113kg/ha in grain and 75.9 kg/ha in straw) was recorded with 1/2 N at basal+1/4 N at maximum tillering stage+1/4 N at panicle initiation stage when compared to control.