Assuring quality cone collection in Abies pindrow (Spach) by developing maturity index

Abstract

The regeneration of the fir is hampered by poor seed years and heavy cone insect infestation. Cone collection therefore is critical in this species to meet the increasing seed demands during poor seed crops. Cone collection should be commenced when they are sufficiently mature. Delaying cone collection results in the shortening in collection period. A study was therefore undertaken to judge the optimum harvest time assuring both quality and collection period by developing various maturity indicators. The cones are mature enough for collection from 15th September onwards when they turn brown purple. The seed and seed wing color for such seeds were recorded as deep brown after which no further change was recorded. The cone weight increased initially and then started declining from 15th September onwards. Cone dispersal commenced from 15th October on the exposed sites and continued till early-Nov. The germination and the seed weight showed progressive increase throughout the collection whereas the specific gravity and moisture percent declined as the collection progressed.