EFFECT OF NITROGEN AND PHOSPHORUS ON GROWTH AND SEED YIELD OF GIMAKALMI

Abstract

An experiment was conducted at the farm of Sher-e-Bangla Agricultural University, during the period of September 2021 – March, 2022 to study the effect of nitrogen and phosphorus on growth and seed yield of gimakalmi. Two factors viz., Factor A: 4 nitrogen levels; N 0 (control), N 1 (60 kg N ha -1 ), N 2 (90 kg N ha -1 ) and N 3 ) and Factor B: 4 phosphorus levels viz., P 0 (control), P 1 (20 kg P ha -1 (120 kg N ha ), P 2 ) and P 3 (40 kg P ha -1 ) were considered for the present study. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Among nitrogen treatments, N 2 showed the best performance on seed yield and quality and gave the highest seed yield (1.79 t ha -1 ), seed germination percentage (85.75%) and seed vigor index (1269.00) compared to other treatments. Among different phosphorus levels, P 2 gave the best results on seed yield and quality parameters and gave the highest seed yield ha -1 (1.85 g), seed germination percentage (85.18%) and seed vigor index (1261.00). Treatment combination of N 2 P 2 registered the highest number of branches plant (22.40), pods plant -1 (835.90), seed weight plant -1 (20.88 g), 1000 seed weight (6.24 g), seed yield plot -1 (501.10 g), seed yield ha -1 (2.32 t), stover yield ha -1 (3.04 t) and harvest index (43.28%). Regarding quality parameters, the highest seed germination (88.20%), shoot length (8.14 cm), root length (7.93 cm) and seed vigor index (1417.00) of seedlings after 12 days of germination were also recorded from the seeds produced from the treatment combination of N 2 P 2 . So, the treatment combination, N 2 P 2 (90 kg N ha -1 1 )) can be considered as best compared to other treatment combinations.