INVESTIGATION ON DEVELOPMENT OF ORGANIC GROWTH PROMOTER AND EVALUATION OF GROWTH VARIATION OF TREE SEEDLINGS
The effect of organic growth promoter on the growth improvement of the five prominentnursery tree seedlings (Chloroxylon swietenia, Ailanthus excelsa, Madhuca longifolia, Syzygium cumini, Azadirachta indica) wasinvestigated. The use of organic growth promoter significantly increased the following parameters like height and biomass of shoot and root, collar diameter estimation, leaves counting, leaf sprout, leaf colour, leaf area index estimation, and Chlorophyll estimation. Soil application and pellet (slow release) of the organic growth promoter increases the shoot height, root height, shoot biomass, root biomass and microbial polulation when compared to the control. The maximum shoot height was found soil application in Syzygium cumini (28.9cm). and the maximum root height was found Madhuca longifolia (60.5cm). The maximumshoot biomass was registered at Syzygium cumini (2.496g) and root biomass maximum was registered at Madhuca longifolia (2.856g).soil application of Madhuca longifolia was recorded the highest basal diameter increment (5.98mm). Foliar spray of the organic growth promoter increases the leaf chlorophyll and carotenoid content, leaf area and leaf colour when compared to the control. The maximum chlorophyll was recorded at Azadirachta indica (0.7322 mg/g-1). The maximum chlorophyll b was recorded at Azadirachta indica (1.1912 mg/g-1). The maximum total chlorophyll was recorded at Azadirachta indica (2.173mg/g-1). The maximum carotenoid was recorded at Azadirachta indica (0.9529mg/g-1). Overall the result of this study suggested that the organic growth promoter application increases the plant growth reduce the nursery period time.
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