DEVELOPMENT OF NURSERY TECHNIQUES AND PROPAGATION TECHNIQUES TO PRODUCE QUALITY PLANTING MATERIAL FOR A FEW SELECTED TROPICAL FOREST TREE SPECIES
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Date
2019-09-05
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
It has become inevitable to grow the trees outside the forest, especially to reduce
the pressure on forest and forest products. The lack of nursery techniques for production
of quality planting materials has become a hindrance in the afforestation programmes.
Hence, there is a need to produce healthy and vigorous seedlings in short duration by
enhancing seed germination through appropriate pre-sowing seed treatments. With this
point in view, the present study was carried out in The Department of Forestry and
Environmental Science, UAS, G.K.V.K., Bangalore. Among five treatments given as a pretreatment
of seeds, Terminalia bellirica, Terminalia arjuna and Ceasalpina bandusella,
were recorded maximum germination percentage viz., 80.30, 76.00 and 67.00 respectively
with 100ppm GA3 (Gibberellic acid) pre-treatment. This infers that, the gibberellic acid
pre-treatment of seeds showed the maximum and uniform germination for most of the
selected tropical tree species. For the standardization of growth media in order to obtain
the healthy seedlings, three different media viz., M1, M2, M3 with different combination of
soil, sand, manure were formulated. The significant result was obtained by using M1
growth media (3:2:1) which produced maximum height at 90DAP in Ceasalpina
bonducella (22.85cm) and Albizia odoratissima (21.05cm) and maximum collar diameter
at 90DAP in Terminalia catappa (4.0mm) and Pterocarpus marsupium (3.10mm) was
recorded. The least growth parameters of seedlings were recorded in M3 growth media
(3:2:0). Thus, the study shows the positive response of pre-treatment of seeds and growth
media standardization for production of healthy and vigorous seedlings.