Studies on the Germination and Viability of Seed of Two Species of Himalayan Alders, Alnus nitida and A. nepalensis

Studies were conducted on factors atrecting germination and longevity of Alnus nepalensis and A. nitida seeds under laboratory condition. Germination in both the species commenced on the 7th day and was completed by the 28th day. A. nitida germinated equally well at 20° or 25°C on TP, BP or TS A. nepalensis germinated equally well on TP at all temperatures, i.e. 20,25,20/30°C or 30°C but was best at 25 in BP and on TS at 20/30°C. Seed emptiness was found one of tbe major causes of poor germination in both the species. Though both the species exhibited variations in germination and longevity but in general the trends were almost similar. Seeds of both tbe species were found short-lived in nature.