Effect of various doses of cowdung and nitrogen on the yield performance of mustard in coastal area of Bangladesh (Brassica sp.)

The experiment was conducted at the agriculture field laboratory of Noakhali Science and Technology University during the period from October 2021 to January 2022 to observe the effect of various doses of cowdung and nitrogen on the performance of mustard. The experiment comprised of two factors viz: cowdung and nitrogen. One organic fertilizer like different level of cowdung-control 0 t ha-1 (C0), 15 t ha-1 (C1), 30 t ha-1 (C2), 45 t ha-1 (C3) and another inorganic fertilizer nitrogen - control 0 kg ha-1 (N0), 100 kg ha-1 (N1), 200 kg ha-1 (N2), 300 Kg ha-1 (N3). The experiment was laid out in Randomized Complete Block Design (RBCD) with three replications. Application of different doses of cowdung and nitrogen significantly influenced the Plant height (cm), branches plant-1 (no.), effective siliqua plant-1 (no.), seeds siliqua-1 (no.), 1000-seed weight (g), seed yield (t ha-1), stover yield (t ha-1), biological yield (t ha-1) and harvest index (%) of mustard. The maximum plant height, number of branches plant-1, number of effective siliqua plant-1, siliqua length, number of seeds siliqua-1, 1000-seed weight, seed yield, stover yield, biological yield and harvest index was obtained with the application of 45 t ha-1 cowdung (C3). On the other hand, with the application of 300 kg ha-1 N the maximum plant height, number of branches plant-1, number of effective siliqua plant-1, siliqua length, number of seeds siliqua, 1000-seed weight, seed yield, stover yield, biological yield was found except the harvest index. In case of the interaction effect of treatment, the highest seed yield (1.77 t ha-1) was obtained from the treatment combination of C3N3 (45 t ha-1 cowdung + 300 kg ha-1 N) and the lowest seed yield (0.93 t ha-1) was found from the control (C0N0) treatment. Res. Agric. Livest. Fish. Vol. 10, No. 2, August 2023: 109-122