Cultivation techniques of poplars:

1. Seeding and propagation

Poplar seeds are small, and the capsules will crack when they are mature, so the seeds are collected by cutting the ear or collecting from the ground. Seeds are easy to lose germination ability, so they should be sown with the harvest. Sow and raise seedlings on sandy loam containing humus.

2. Cutting propagation

(1) Select high-quality seed strips

Select annual cutting seedlings, and it is appropriate to use the middle and lower parts of the first-class seedlings and the second-class seedlings as seed strips. The third-grade seedlings can not be used as the second-grade seedlings, the parts with poor lignification at the tips and the seedlings with pests and diseases can not be used as the seed strips;

(2) Cutting cuttings and treatment

The cutting cuttings are 16cm-18cm long, and the distance between buds is 1cm. The cuttings are cut, bundled and soaked in clear water to ensure that the cuttings do not lose water.

(3) Cutting time, method and density

1. Cutting time: January to early March.

2. Cutting method: insert the cuttings directly into the soil for 2/3-3/4, and be careful not to insert them backwards. After inserting, tighten the soil and water them once.

3. Cutting density: adopt the mode of wide row and dense plant, with plant spacing of 4cm×6cm, 6cm×7cm or 35cm×7cm.

Management method:

Poplar seedlings in the growing period must pay attention to the dynamics of the field, and never let the seedlings become yellow and rotten due to lack of water, and replenish water to the seedlings in time. It is difficult to fertilize the newly planted seedlings, because the seedlings are not stable at first, and it will be counterproductive if they are fertilized immediately; In the second year, a small amount of fertilizer can be applied, combined with watering. At this time, the leaves of the seedlings can be slightly trimmed, and the old leaves and dead leaves that have grown before can be removed, so that new leaves can be regenerated.