Influence of inorganic nutrient, organic nutrient and bio-fertilizer on growth, yield and quality of cumin black (Nigella sativa L.) in eastern Himalayan region of West Bengal

Abstract

The cumin black (var. Rajendra Shyama) was cultivated on field under treatments including three nutrient sources i.e., inorganic fertilizer, farmyard manure and bio-fertilizer Azophos. Inorganic fertilizers were applied in three levels viz., no fertilizer (C0), 75% of recommended dose (C1) and 100% of recommended dose (C2); farm yard manure (FYM) and Azophos was applied in two levels viz., with (F1) and without (F0) FYM; with (B1) and without (B0) bio-fertilizer. The results showed that C2 recorded maximum plant height (52.37 cm), leaf chlorophyll (12.37 SPAD), seed per capsule (89.62) and yield per plant (2.06 g). F1 showed positive influence resulting higher values for plant height (49.38 cm), yield per plant (1.95 g) and seed oil content (32.07 mg/g). B1 showed higher leaf chlorophyll (12.56 SPAD), seed per capsule (88.72), yield per plant (1.67g), and oil content (32.27 mg/g) over control treatments. The highest seed oil content was recorded when F1 was used in combination with C2, which was 15.22% higher over C2 alone.