INFLUENCE OF PLANT SPACING AND LEVELS OF NITROGEN ON GRAIN YIELD AND NITROGEN UPTAKE OF INBRED AND HYBRID AROMATIC RICE

摘要

Field experiments in split plot design with three replications were conducted to find out the appropriate plant spacing and nitrogen requirement for inbred and hybrid aromatic rice. The yield performance at a spacing of 20 x 20 cm was significant andrecorded 16.1 and 16.4 per cent and 6.5 and 5.7 per cent more over the spacings of 20 x 10 and 20 x 15 cm, respectively. Application of 160 kg N/ha produced significantly highest grain (50.65 and 53.85 q/ha) and straw yield along with highest nitrogen uptake over 0 and 80 kg N/ha. Nitrogen uptake by grain significantly increased with increase in plant spacing, whereas it was reverse for N uptake by straw. Rice hybrid PRH 10 was superior to inbred varieties Pusa Sugandh 3 and Pusa Basmati 1 in producinggrain yield and utilizing nitrogen.