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Second, to grasp the maturity of forest seed, due to different tree species, maturity is also different, the same species of geographical environment is different, the maturity is not the same. Before the seeds are harvested, it is necessary to understand the maturity of the tree species and make timely seed collection.
Third, we must understand the maturity of the seed after the fall time, the general maturity of the seed after long-term landing of trees, such as pine, Robinia pseudoacacia, etc., can extend the seed collection period, but it can not be delayed too long, so as not to reduce seed quality. Immediately after maturation, small seeds, such as poplar, willow, eucalyptus, etc. scattered in the wind should be collected immediately after the seeds are mature.
4. Seeds of pine and Platycladus orientalis are mature before uncracked, and dried and harvested in time after harvest.
5. Fruit branches and ears (seabuckthorn, etc.) can be cut when collecting seeds, but not excessive pruning, affecting the amount of seeds in the coming year.
6. Take the harvested fruit as soon as possible for threshing, seeding, miscellaneous, drying, grading and storage. According to the seed's origin, seed collection time and level, registration is performed to ensure seed quality.
First, choose a good mother tree species, seed collection should choose the age of trees. The age-old tree has the advantages of hereditary stability, strong growth, and high amount of results. The mother tree is too young, plasticity is large, and the growth of the formed stands is not stable. If the age is too large, the growth is debilitated and the viability of their offspring is low.