Bharati KashyapNITESH KAUSHAL2024-06-152024-06-152024-05-18https://krishikosh.egranth.ac.in/handle/1/5810210496The present investigation titled “Studies on the influence of nutritional and growth regulator modules on quality cutting production of Marigold (Tagetes erecta L.) cv. Siracole” was carried out at the Research Farm of Department of Floriculture and Landscape Architecture, Dr. YS Parmar University of Horticulture and Forestry, (Nauni) Solan (HP) for three consecutive years; 2022, 2023 and 2024. The experiment was laid out in RBD (Factorial) with three replications. The two experiments were conducted on the effect of different nutritional modules and growth regulators on cutting production of marigold cv. ‘Siracole’ and the comparative effect of cutting production modules on growth and flowering. In Experiment-I, it was observed that the application of 30-20-20 g/m2 NPK with exogenous application of GA3 @ 100 ppm resulted in longer cutting length (10.58 cm) whereas number of cuttings per plant (92.92) and per m2 (826.64) was observed more when mother block was treated with BA @ 100 ppm + RDF. Jeevamrit application @ 2 L/m2 at 15 days interval produced the cuttings with maximum diameter (3.64 mm), weight of cuttings (1.62 g), rooting percentage (84.50 %), maximum number of roots per cutting (35.46) and survival percentage (81.59 %). Out of the harvesting flushes, the cuttings produced from second flush (H2) were having maximum diameter of cuttings (3.57 mm) and weight of cuttings (1.73 g) which was at par with H1, while the maximum rooting percentage (81.90 %), maximum number of roots per cutting (29.78) and maximum survival percentage (78.07 %) was observed in H1. Out of the seasons, more rooting percentage (82.43 %), maximum number of roots per cutting (30.11) and survival percentage (80.53 %) was observed in summer season. In Experiment-II, Out of three flushes (H1) i.e. first harvest of cuttings was better in terms of number of marketable flowers per square meter (1054.21), marketable flower yield per plant (844.69 g) and marketable flower yield per square meter (97.27 kg). Out of seasons, the cuttings planted during summers resulted into maximum number of marketable flowers per square meter (1047.93), marketable flower yield per plant (938.39 g) and marketable flower yield per square meter (8.00 kg). Both the nutritional modules i.e. Jeevamrit @ 2 L/m2 and RDF produced equivalent number of marketable flowers per square meter (1021.59 and 1012.81; respectively), marketable flower yield per plant (853.85 and 821.62 g; respectively) and marketable flower yield per square meter (7.29 and 7.00 kg; respectively). Hence, it can be concluded that Jeevamrit @ 2 L/m2, an organic amendment, can serve as an alternative to chemical fertilizers for quality flower production in marigold cultivar ‘Siracole’EnglishThesis