Effect of Seed Size and Temperature Treatments on Germination of Various Seed Sources of Pinus wallichiana and Pinus roxburghii from Garhwal Mmalaya

The present study was undertaken to find out the effect of Hydrogen peroxide on germination of various provenances of Pinus wallichiana and Pinus roxburghii, which had a significant affect on rate and average germination percentage. It has been observed that H²O² treatment has reduced the germination period of these species appreciably down to 8 days and 10 days respectively. Therefore, seeds of these commercially important tree species should be pre- treated particularly with H²O² 1 % v/v for 24 hours to obtain optimum germination. The large sized seeds in Pinus wallichiana (mean germination percentage, 54.66%) and medium sized seeds in Pinus roxburghii (mean germination percentage, 93.33%) have been recorded favourable for getting increased seed germination under laboratory conditions.