Kant, KamalThakur, Ghanshyam2023-04-092023-04-092022https://krishikosh.egranth.ac.in/handle/1/5810196170Coriander (Coriandrum sativum L.) is an important vegetable as well as seed spice crop mainly grown in rabi season and belongs to family Apiaceae. The present investigation entitled “Response of various levels of nutrients and PGRs on quality seed yield of coriander (Coriandrum sativum)” was conducted at vegetable research farm Department of Horticulture (Vegetable & Floriculture), BAC, Sabour during the years 2020-21 and 2021-22 in rabi season. There were four levels of fertilizers F1 (N60: P40: K30), F2 (N70: P50: K40), F3 (N80: P60: K50), F4 (N90: P70: K60) and 10 levels of PGRs ie. P0 (Control), P1 (GA3 20 ppm), P2 (GA3 40 ppm), P3 (GA3 60 ppm), P4 (ethrel 100 ppm), P5 (ethrel 150 ppm), P6 (ethrel 200 ppm), P7 (NAA 25 ppm), P8 (NAA 50 ppm), P9 (NAA 75 ppm). Treatment wise fertilizer and PGRs were applied. PGRs were applied as seed treatment and foliar spray. Foliar spray of PGRs were made at 45 and 60 DAS. The variety used was Pant Haritima. The experimental design was Factorial Randomized Block Design with 40 treatment combinations which werereplicated thrice. Significantly highest number of primary branches (9.15), dry matter per plant at harvest (15.30 gm), number of umbels per plant (29.64), biological yield (50.33 q/ha.), straw yield (2613.75 kg/ha), N (2.84 %) in seed, protein content in seed (17.76 %), N (1.49 %) in straw, protein content in straw (9.34 %), P (0.36 %) in seed, P (0.086 %) in straw were obtained in F3P6 (N80: P60: K50 + ethrel 200 ppm) while plant height at harvest (136.55 days), number of secondary branches (27.09), dry matter per plant at 90 DAS (10.71 gm), umbellets per umbel (5.93), days to earlier first flower initiation (60.59 days), days to earlier 50 % flowering (75 days), earlier number of days to seed maturity (111.08 days) were found non- significant. Nitrogen (82.31 kg ha-1) and Phosphorus uptake (7.82 kg ha-1) were found significant in treatment combination F3P6 (N80: P60: K50 + ethrel 200 ppm) whereas potassium uptake (39.16 kg ha-1) was found significant in treatment F3P5 (N80: P60: K50 + ethrel 150 ppm). Test weight (12.79 gm), germination (90.90 %) seedling length (30.40 cm), seedling dry weight (313.10 mg), vigour index- I (2735.71) and vigour index- II (28.08) were found non- significant while K (0.78 %) in seed, K (1.10 %) in straw, available N (220.09 Kg ha-1), available P (18.97 Kg ha-1), available K (166.56 Kg ha-1), pH (8.08), EC (0.23) were also found non- significant. Harvesting index (33.55 %) was found highly significant in F3P5 (N80: P60: K50 + ethrel 150 ppm) while organic carbon (0.61) and number of seeds per umbellets (8.35) were highly significant in F4P6 (N90: P70: K60 + ethrel 200 ppm) and F3P3 (N80: P60: K50 + GA3 60 ppm) respectively. Therefore, it may be concluded that significantly highest seed yield (15.54 q/ha.) was obtained in treatment F3P6(N80: P60: K50 + ethrel 200 ppm) as well as maximum net return(Rs.1,05,616/ha.) with higher B:C ratio (2.75) were recorded in this treatment.EnglishThesis