Email:
dhiman_mukherjee@yahoo.co.in
Address:
Directorate of Research, Regional Research Station, Bidhan Chandra Krishi Viswavidyalaya, Jhargram, West Bengal 721507, India
Greengram, Nutrient management, Weed control, Yield and economics
Field experiment was undertaken during summer season of 2020 and 2021 to evaluate the effect of various different nutrient and weed management options for higher productivity of greengram under new alluvial zone of West Bengal. The experiment was laid out in a split plot design with three replications and 28 treatment combinations. The treatments comprised with four main plot treatment, which includes nutrient management, viz. 100% RDNPK, 100% RDPK +75% RDN + 25% N (vermicompost), 100% RDPK +75% RDN + 25% N (FYM), and 75 % RDNPK + Rhizobium + PSB and seven weed control measures, viz. pendimethalin 1.25 kg/ha fb one hand weeding 25 DAS, pendimethalin 1.25 kg/ha fb hoeing at 25 DAS, pendimethalin 1.25 kg/ha fb imazethapyr 100 g/ha, pendimethalin 1.25 kg/ha fb quizalofop-ethyl 50 g/ha, pendimethalin 1.25 kg/ha fb fenoxaprop-p-ethyl 100 g/ha, weed check and weed free. Dry weight of weeds at 60 DAS lower observed with the 100% RDPK + 75% RDN + 25% N through vermicompost and was statistically better to other treatments. Whereas, it was lowest under pendimethalin 1.25 kg/ha fb quizalofop-ethyl 50 g/ha and was at par with pendimethalin 1.25 kg/ha fb imazethapyr 100 g/ha and pendimethalin 1.25 kg/ha fb one hand weeding 25 DAS and significantly superior to other integrated treatments. More seed yields was found with 100% RDPK +75% RDN + 25% N (vermicompost) and was at par with all other main plot treatments except 100% RDPK +75% RDN + 25% N (FYM). Highest stover production was observed with 100% RDNPK which was at par with 100% RDPK +75% RDN + 25% N (vermicompost). Per cent increase in seed yield in main plot due to treatment, 100% RDPK +75% RDN + 25% N (vermicompost), 100% RDNPK and 75% RDNPK + Rhizobium + PSB was 52.48, 47.03 and 44.09 %, respectively compared to 100% RDPK +75% RDN + 25% N (FYM). The corresponding increase in straw yield under these treatments were 74.91, 79.01 and 48.11% as against the lowest recorded in 100% RDPK +75% RDN + 25% N (FYM). More seed and straw yield of greengram was recorded in weed free treatment followed by pre- and post-emergence application of pendimethalin 1.25 kg/ha fb imazethapyr 100 g/ha. Data revealed per cent increase in seed yield due to weed free and pendimethalin 1.25 kg/ha fb imazethapyr 100 g/ha, which was 158.1 and 139.35%, respectively compared to weedy check. More return ( 50,052) and B:C ratio (2.27) was observed with 100% RDPK +75% RDN + 25% N (vermicompost) closely followed by 75 % RDNPK + Rhizobium + PSB and 100% RDNPK. With weed control measures, more return ( 46,584) and B: C ratio (2.23) was observed with pendimethalin 1.25 kg/ha fb imazethapyr 100 g/ha, pendimethalin 1.25 kg/ha and quizalofop-ethyl 50 g/ha