Seed collection: Ash trees bloom from April to May and mature from September to October. Choose good plants that grow sturdy and free from diseases and insect pests, and pick them when the samara changes from green to yellowish brown and the seeds are hard. When the seeds do not fall after maturity, the fruit branches can be cut, the wings removed, and the sundries are removed. The seeds are put into a container and stored in a sterilized, low-temperature, dry, and ventilated room.
Seed treatment: pewter seeds have a long dormancy period, and spring sowing must be pre-germinated. The methods of pre-germination treatment include low-temperature stratification and rapid high-temperature germination.
Sowing seedlings: spring sowing should be early, usually in late February to early March. Ditching and drilling, the amount of seed used is 3-4 kg per 667 square meters, the depth is 4 cm, the depth is uniform, with the ditch, with the sowing, and with the cover, the thickness of the cover is 2-3 cm. In order to make the soil species close together, the soil was covered and suppressed.
Cutting seedlings: in the spring from late March to early March, before cutting, prepare the ground carefully and apply enough base fertilizer to loosen the soil and have sufficient water. Select 1-year-old sprout branches from a fast-growing, disease-free young mother tree. Generally, the thickness of the branches is more than 1 cm and the length is 15-20 cm. The upper cut is flat cut, and the lower cut is horse-ear shaped. Insert 2-3 roots in each hole to disperse the cuttings. The row spacing is 40 cm and the plant spacing is 20 cm. The spring cuttings should be deep buried, solid, and less outcropping. 4000 plants per 667 square meters.
Tending Management:
⒈Irrigation: During the seed germination period, the bed surface should be kept moist, and irrigation should be done in small amounts and several times; after the seedlings emerge, the cotyledons are fully expanded and enter the vigorous growth period. The amount of irrigation should be more and the frequency should be less. Irrigate once every 2-3 days , Every time you have to pour thoroughly. Irrigate in the morning and evening. Drain water in time when it is rainy in autumn.
⒉Soil loosening: In line with the principle of "eliminate early, eliminate small, and eliminate", weeds will be removed after rain or irrigation, and the seedlings will enter the peak growth period. The soil should be shallow in the early stage and slightly deeper in the later stage, so as not to damage the roots of the seedlings. quasi. ⒊ Top dressing: apply chemical fertilizer to supplement during the period of vigorous growth of seedlings. Nitrogen fertilizer should be applied in the seedling stage, nitrogen fertilizer, potassium fertilizer or several fertilizers should be used in the fast-growing stage of the seedlings. Nitrogen fertilizer should be stopped in the late growth period and potassium fertilizer should be applied more. The top dressing should be mainly quick-acting fertilizer, small amount and many times.