What is the way poplars spread their seeds?

Poplar is a plant of poplar genus, also known as Salix, centipede willow, distributed in most parts of China, mostly as a sidewalk, landscape and protective tree species. And how does it spread its seeds?

What is the method of poplar seed dispersal?

Natural growth of poplar seeds are spread by wind, its fruit will automatically crack when mature, when the poplar will fly around, will also be scattered around. Modern poplar seeds are artificially sown.

2. How to plant poplar trees?

1. breeding

Poplar trees can be propagated by sowing or cutting. Of which:

Sowing: seed picking method or from the ground with cutting ears collected, appropriate with the pick with sowing. Sowing seedlings on sandy loam soil containing much humus.

Cuttings: annual cuttings can be selected to a seedling and secondary seedlings in the middle part of the seed is appropriate. The third grade seedlings were not developed well and could not be used as secondary seedlings, and the parts with poor lignification and pests could not be used as seed strips. Cutting time should be carried out in early February-March, straight insertion, cutting into the soil 2 - 3-3/4, pay attention not to insert upside down, after planting tight soil and irrigation once.

2. management

From the time of cuttage to the time when cuttings begin to root and spread leaves, it generally takes 2-4 weeks. During this period, cuttings are most likely to lose water balance, and the resistance is very weak. The cuttings that cannot root in time will die. For example, in April 2007, during the critical period of cutting and rooting, there was no rain for nearly a month, resulting in the survival rate of many new poplar nurseries being only about 70%. Therefore, it is the key point of management to maintain proper soil humidity in this period. In case of severe drought, irrigation should be conducted once. After irrigation, shallow hoe should be done in time to prevent surface hardening, otherwise the survival rate will be reduced.

3. topdressing

Poplar can be topdressed in the same year after planting and survival, and the effect is better when it is applied twice in early May and late July. Less or later application can be made in the year of afforestation, and more application can be made appropriately after young forest closure. The topdressing type is generally based on quick-acting nitrogen fertilizer. 15 kg urea and 30 kg ammonium bicarbonate can be applied every 667 square meters (1 mu) every year. Half of the fertilizer application amount of the whole year can be applied every time. Ammonium bicarbonate and binary compound fertilizer are the main topdressing in spring, and urea fertilizer effect is slow when ground temperature is low.

4. pruning

1 to 3 years old trees should be pruned as little as possible or not pruned, leaving more branches and leaves; trees over 4 years old should be pruned from autumn and winter to spring germination of the following year. During the dormant period of trees, pruning should be mainly thinning, cutting or sawing should be smooth when thinning branches, leaving no tree pegs. During the dormant period of trees, pruning should be mainly thinning, cutting or sawing should be smooth when thinning branches, leaving no tree pegs.