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Birsa Agricultural University, Ranchi

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Subject: Silviculture and Agroforestry × Author: Lalan Kumar Sharma × End date: 1997 × Start date: 1993 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of Plant Growth Regulators on Stem Cutting of Dalbergia Latifolia Roxb. And Dalbergia Sissoo Roxb
    (Birsa Agricultural University, Ranchi, 1997) Lalan Kumar Sharma; Dr. O. N. Pandey
    It is well known fact that the quality and quantity of wood in India is depleting at an alarming rate. National Forest Policy(1988) enunciates that 1/ 3rd of the total land area of the country should be under forests. At present the total recorded area of the forest in India is only 19.4% (Anon, 1991) To overcome the situation we have to maintain the natural forest cover as well as to make large scale plantations of multipurpose tree species (MPTS). Dalbergia latifolia (Rosewood) and Dalbergia sissoo (Shisham) are the two species belonging to family Papilionaceae which rank among the finest woods Being good fodder and nitrogen fixing tree species these are opted in afforestation/ reforestation/social-forestry/agroforestry programmes very frequently. Nursery technique of D. sissoo has been standardized by various scientists Some attempts have also been made with stem cuttings. But most of the works have been done in mist condition. The technique for the rooting of cuttings in open conditions is yet to be standardized. No work has been reported on the propagation of D. latifolia except Negi (1982). It is a poor seed producing species. To maintain the quality of timber and to commercialize its propagation, the present investigation entitled "Effect of plant growth. regulators on stem cuttings of Dalbergia latifolia Roxb. and Dalbergia sissoo Roxb." was conducted. Four levels of P.G.RS (Plant Growth Regulators) ie.. 2000 ppm IBA. 5000 ppm IBA. 8000 ppm IBA solution and surootex-05 grade in powder form. were taken as treatments. Stem cuttings of 18-20 cm length and 0.5 to 10 cm diameter were collected from one-year old shoots of 10-15 years age class trees Observations were recorded upto four months. The experiment was conducted in Randomized Block Design with three replications during 1995 at Rarha Research Station of Faculty of Forestry, B.A U. Kanke, Ranchi Regarding root behavior, D. sisson performed better in comparison to 1). latifolia in all respects viz. number of days taken for rooting, number and length of primary & secondary roots, percentage of rooting. 62% rooting was achieved by D. Sisson whereas 1. latifolia secured 50% rooting Among levels of hormones used. IBA 5000 ppm always showed better result than other treatments 83% rooting response was seen in 5000 ppm IBA followed by 65% in 2000 ppm IBA. Surootex got fourth position having 40% of rooting. All the treatments were superior to control. Interactions between the species and levels of P.G.Rs showed significant effect on percentage of rooting. D.sixson with 5000 ppm IBA combination secured the maximum (39%) and D). latifolia with control secured the minimum (25%) Higher percentage of survival of plants (56%) was given by D. sissoo and D. latifolia gave 46% of survival 5000 ppm again showed its superiority giving maximum percentage of survival (78%) followed by 2000 ppm IBA (59%). Surootex got fourth position in this respect but all the treatments showed superior result to control. Regarding growth and uniformity of plants. D. sisson between species and 5000 ppm among the levels of hormones showed the best result in all respects viz. number of leaves pershoot, shoot length, plant height and basal diameter except in days taken for shoot emergence where D. latifolia performed better Maximum plant height of 38.0 cm was recorded after the four months of planting of cuttings in case of D. sissoo. D. latifolia achieved 33.0 cm of plant height during this period. 5000 ppm again attained the maximum height (37.2 cm) followed by 2000 ppm IBA (36.8 cm). Surootex got fourth position in this respect. At all stages of time the growth and uniformity of the plants was maintained. Hence for rooting of cuttings, 5000 ppm IBA may be recommended to growers for future use for the multiplication of plants of D. latifolia and D. sissoo.