GROWTH AND YIELD OF WHEAT (Triticum aestivum L.) AS INFLUENCED BY NITROGEN AND SEED RATE

Abstract

An experiment was conducted at the Agronomy Field of Sher-e-Rangla Agricultural University, Dhaka. during November to March. 2005-2006 to investigate the effect of nitrogen and seed rate on the growth. yield attributes and yield of wheat cv. Shourav. The treatment consists of four nitrogen levels (0. 60, 100 and 140 kg hi') and four seed rates (80, 100, 120 and 140 kg hi'). The experiment was laid out in a split-plot design with three replications. Experiment results showed that nitrogen had significant effect on plant height, dry matter accumulation, crop growth rate, relative growth rate, number of total tillers per in2 , number of effective tillers per 7fl2• L.) AS spike length, number of fertile spikelets spikc', number of unfertile spikelets spike', 1000 grain weight, grain yield, straw yield and harvest index. The results revealed that nitrogen at the rate of 100 kg hi' showed the best performance in all the parameters studied. The highest grain yield (3.3 t hi') and straw yield (4.36 t hi') was obtained from 100 kg N had while control treatment gave the lowest grain and straw yield of 2.19 and 3.1 ton ha1 respectively. The grain and straw yields increased correspondingly with the increase of N frorn C) to 100 kg hi' and decreased thereafter. Seed rate of 120 kg ha 1 gave the highest grain yield (3.08 t hi') and seed rate of 140 kg ha1 gave the highest straw yield (4.27 t hi') of wheat. Among the various interactions, nitrogen at the rate of 100 kg along with 120 kg seed ha produced the highest grain yield of 3.65 t ha 1.