Rai, RatnaMeher, Sushree Suchismita2022-10-052022-10-052022-08https://krishikosh.egranth.ac.in/handle/1/5810188593The present experiment entitled “Effect of biostimulants on survival percentage, vegetative growth and biochemical characteristics of air layers in litchi cv. Rose Scented” was conducted at Horticulture Research Centre, Patharchatta, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar (Uttarakhand) during the year 2021-2022. The objectives of the study were to evaluate the effect of biostimulants on survival percentage, vegetative characteristics, biochemical parameters and leaf nutrient contents of air layers in litchi cv. Rose Scented. The experiment was carried out as per Completely Randomized Design (CRD) having three replications. The experiment comprised of eleven treatments viz.,control (T1) where only water was used, seaweed extract @ 5 ml/L (T2), seaweed extract @ 10 ml/L (T3), triacontanol @ 5 ml/L (T4), triacontanol @ 10 ml/L (T5), kunapajala 1 @ 50 ml/L (T6), kunapajala 1 @ 100 ml/L (T7), kunapajala 2 @ 50 ml/L (T8), kunapajala 2 @ 100 ml/L (T9), kunapajala 3 @ 50 ml/L (T10) and kunapajala 3 @ 100 ml/L (T11). The results obtained from the study indicated that maximum values of all the growth parameters viz., shoot length (30.38 % at 120 DAP and 43.29 % at 180 DAP), number of leaves (22.23 at 120 DAP and 25.46 at 180 DAP), number of primary roots (19.15 at 120 DAP and 23.48 at 180 DAP), length of primary roots (7.8 cm at 120 DAP and 9.86 cm at 180 DAP), relative growth rate (1.902 mg/day at 120 DAP and 2.672 mg/day at 180 DAP), survival percentage (90% at 120 DAP and 88.33 % at 180 DAP), biochemical parameters including total chlorophyll (1.46 mg/g at 120 DAP and 3.4 mg/g at 180 DAP), total carotenoids (0.117 mg/g at 120 DAP and 0.292 mg/g at 180 DAP), phenols (36.1 mg/100g at 120 DAP and 48.62 mg/100g at 180 DAP), proline (0.382 μmol/g at 120 DAP and 0.462 μmol/g at 180 DAP), catalase activity (62.437 nmol/min/g FW at 180 DAP) and leaf nutrient contents at 180 DAP were found to be maximum in the plants sprayed with herbal kunapajala 2 @ 100 ml/L. Lowest values for all these traits were observed in triacontanol @ 10 ml/L.Therefore, on the basis of results obtained in the present investigation, it can be concluded that the application of herbal kunapajala 2 @ 100 ml/L can significantly improve the survival percentage, vegetative growth and biochemical characteristics of air layers in litchi cv. Rose Scented.EnglishThesis