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Birsa Agricultural University, Ranchi

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Subject: Silviculture and Agroforestry × Author: Pankaj Kumar Singh × End date: 1997 × Start date: 1993 × Type: Thesis ×
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    ThesisItemOpen Access
    Studie4s on Seed Germination And Seedling Growth of Teak ( Tactona Grandis Linn F.)
    (Birsa Agricultural University, Ranchi, 1997) Pankaj Kumar Singh; V. Sivaji
    Preparation of good nursery gook for teak is prerequisite for raising plantations as health and vigour of the seedlings is an index for stump preparation and its future performance on out planting in the field. Present investigations were aimed to determine the optimum size of the fruits, best provenance and most suitable pretreatment needed for production of nursery stock of Tectona grandis Linn.f. Three fruits sizes viz. Large fruit 14mm to 18mm diameter (L.F.), Medium fruit = 11mm to 13mm dia. (H.F.), Small fruit = 8mm to 10mn (S.F.). Three provenances viz. P₁ = Ranchi, P2 = Jabalpur, Pa = Dehradun and four treatments including control, viz. C = Control, 28-D=20 days alternate soaking/drying (12 hours each), 35-D-35 days alternate soaking/drying (12 hours each), 50-D-50 days alternate soaking/drying (12 hours each) were taken for the study. The studies were conducted to study the effect of factors individually and interaction of fruit size and provenance, fruit size and pretreatment. The nursery experiments were conducted in Completely Randomised Design (C.R.D.) with three replications during year 1996 at the nursery of Faculty of Forestry, B.A.U. Kanke, Ranchi. Laboratory investigations were also conducted to study emptiness and seededness in fruits of teak. Results of present investigations indicated that the bigger sized fruits having more than 11mm diameter consists better percentage of seeded fruits and was found to be most suited for the germination and growth of seedlings. The dry weight of shoot, root and leaves was found to be more in case of large sized fruits, whereas, it was found that, it takes more time for commencement of germination in comparison to small sized fruits. Results of experiment indicated that the provenance had shown nonsignificant influence on the parameters studied with an exception of shoot length. However, the fruits from Jabalpur provenance had given higher values on parameters studied. Present study had shown that the pretreatment has significant influence on all the parameters of germination and growth of seedlings. Increase in the number of days of pretreatments will reduce the number of days taken for the commencement of germination. It was found that the higher values of growth parameters were obtained from the fruits given 20 days treatment than that of the 50 days treatment. Interaction of the factors between fruit size and provenance and fruit size and pretreatment did not have any significant influence on any of the parameters studied. Thus, in the present study fruit size and pretreatment had shown the significant on the germination and growth of the teak seedlings. Provenance, interaction of factors between fruit size and provenance, fruit size and pretreatment had shown nonsignificant results in most of the parameters studied.