GROWTH AND YIELD OF MUSTARD ( Brassica Campestris) AS INFLUENCED BY DIFFERENT LEVELS OF POTASSIUM AND ZINC

Abstract

The experiment was undertaken at the field of Sher-e-Bangla Agricultural University, during rabi season (October to March) of 2020-21 to growth and yield of mustard as influenced by different levels of potassium and zinc (brassica campestris). In this experiment, the treatment consisted of three different K levels viz. K 0 = 55 kg ha -1 and K 2 = 65 kg ha -1 and three different level of Zn viz. Zn 0 viii

= 0 kg ha = 0 kg ha = 1.5 kg ha -1 and Zn 2 =2.5 kg ha -1 . The experiment was laid out in two factors Randomized Complete Block Design (RCBD) with three replications. There are 9 treatment combinations of different level of potassium and Zinc. The seeds were sown at the rate of 7 kg ha -1 . The highest plant height, number of leaves per plant, number of branches per plant, length of siliquae, number of siliquae per plant, number of seed per siliquae, thousand seed weight, yield of seed per hectare (1.63 t) was obtained from 65 kg ha -1 K. The highest plant height, number of siliquae per plant, thousand seed weight, seed yield (1.45 t) was recorded along with 2.5 kg ha -1 Zn. The interaction between different levels of K and Zn was significantly influenced on almost all morphological parameters and yield contributing characters including seed yield. The maximum value of morphological parameters, yield contributing characters and seed yield of mustard were observed with treatment T 9 (the combined dose of 65 kg ha K along with 2.5 Kg ha -1 Zn) whereas the lowest values were obtained from treatment 1 (control condition, 0 kg/ha K and 0 kg ha -1 Zn treatment combination). The maximum yield of seed per hectare (1.67 t) was obtained from T 9 (65 kg ha -1 -1 K with 2.5 Kg ha Zn treatment combination). The highest Stover yield and biological yield was recorded from T 9 (65 kg ha -1 K with 2.5 kg ha -1 Zn). T 8 (combination of 65 kg ha K with 1.5 Kg ha -1 Zn) gives almost similar result with T 9