EFFECT OF MACRONUTRIENTS COMBINATION WITH PLANT SPACING ON THE GROWTH AND YIELD OF BLACK CUMIN (Nigella sativa L.)

Abstract

An experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during October 2019 to March 2020 to study the effect of macronutrients combination and plant spacing on growth and yield of black cumin (Nigella sativa L.). Black cumin variety BARI Kalozira 1 was used as planting material in this study. The experiment consisted of two factors: Factor-A: macro nutrient combinations (4 levels): T 1 = N 0 P 0 K 0 kg ha -1 (control), T 2 III

= N 45 P 25 K 20 kg ha -1 , T 3 = N 135 P 75 K 60 ; FactorB: plant spacing (3 levels): S 1 = 20cm×10cm, S 2 = 20cm×15cm and S 3 = 20cm×20cm. The experiment was laid out in a randomized complete block design (factorial) with three (3) replications. Data on different growth, yield contributing and yield parameter of black cumin were recorded and significant variation was observed from different treatments. In case of nutrient combinations the tallest plant (54.86 cm) was observed from T 3

kg ha -1 ) treatment. The maximum primary branch plant -1 1 (12.18), flower plant -1 (22.20), capsules plant -1 kg ha -1 (N 135 (8.62) and secondary branch plant (19.69), seeds capsules (76.18), 1000 seed weight (2.99 g) and germination percentage (91.00%) was observed from T 2

(N 90 P 50 K 40 kg ha -1 ) treatment. The highest seed yield plant -1 -1 (3.36 g), seed yield plot

(170.4 g), seed yield ha -1 (1.18 t) and dry matter (11.29 g) were observed from T 2

(N 90 P 50 K 40 kg ha -1 ) treatment. In case of plant spacing the tallest plant (48.34 cm) was observed from S 1 (20cm×10cm) treatment. The maximum primary branch plant (7.80) and secondary branch plant -1 (11.23) flower plant -1 (20.26), capsules plant (18.81), 1000 seed weight (2.99 g) , seed yield plant -1 (3.89 g) and germination percentage (89.85%) were observed from S 3 (20cm×20cm) treatment. The maximum seeds capsules (71.77 g) and dry matter (10.03 g) were observed from S 2 -1 -1 (20cm×15cm) treatment. The seed yield plot

(156.66 g) and seed yield ha -1 (1.09 t) were recorded from S 1 (20cm×10cm) treatment. The highest BCR (2.80) was obtained from the T 2 S 2 treatment combination where as the lowest BCR (2.24) was from T 0 treatment combination. It may be concluded that, sowing of black cumin providing 90 kg N, 50 kg P and 40 kg K nutrient combination with 20 cm × 15 cm plant spacing was recorded to be more suitable practice for getting higher amount and quality of seed yield of black cumin.