EFFICACY OF INTEGRATED NITROGEN AND IRRIGATION MANAGEMENT ON THE YIELD AND YIELD ATTRIBUTES OF BLACKGRAM

Abstract

An experiment was carried out at Sher-e-Bangla Agricultural University farm; Dhaka to investigate the efficacy of integrated nitrogen and irrigation managements on the yield attributes and yields of blackgram cv. BARI mash-3 (Vigna mungo L.) cv. BARI mash-3 during the period from March 2006 to May 2006. The trial comprised of ten treatments such as T1= No fertilizer and no irrigation (control), T2 = 20 kg N ha-1 as basal, T3 = 20 kg N ha-1 as basal with one irrigation at first flowering stage, T4 = 30 kg N ha-1 as basal, T5 = 30 kg N ha-1 as basal with one irrigation at first flowering stage, T6 = 40 kg N ha-1 as basal, T7 = 40 kg N ha-1 as basal with one irrigation at first flowering stage, T8 = 10 kg N ha-1 as basal and split 10 kg N ha-1 with one irrigation at first flowering stage, T9 = 15 kg N ha-1 as basal and split 15 kg N ha-1 with one irrigation at first flowering stage and T10 = 20 kg N ha-1 as basal and split 20 kg N ha-1 with one irrigation at first flowering stage. Result revealed that nitrogen and irrigation influenced significantly on most of the growth, yield parameters and yield of blackgram. Plant height, number of branches per plant, number of leaves per plant, seeds per pod, leaf dry weight and stem dry weight increased significantly with 40 kg N ha-1 as basal with one irrigation at first flowering stage (35 DAS).This greater dry matter eventually supported the plant to produce more number of branches and pods per plant, which resulted in maximum seed yield per plant (10.45 g) or per hectare (1.86 ton). A functional positive relationship was observed among number of branches per plant, 1000-seed weight, pods per plant, and seeds per pod with seed yield