Key points of ash planting and picture appreciation

Ash tree is a kind of sand-fixing tree species, because there are wax insects on the tree, so the name. There are more than 20 varieties of ash in China, its wood is very tough, it doesn't matter if the water is wet, it can be made into furniture, plywood, farm tools and so on, which has a certain economic value. Next, let's take a look at the key points of ash planting and picture introduction.

1. Seed collection

Ash blossoms from April to May and matures from September to October. The excellent plants with strong growth and no diseases and insect pests were selected and picked when the Samara changed from green to yellowish brown and the kernels were hard. If the seeds do not fall after maturity, you can cut off the fruit branches, dry the wings, remove sundries, put the seeds in a container and store them in a sterilized, low-temperature, dry and ventilated room.

two。 Seed treatment

White wax seeds have a long dormancy period and must be accelerated before sowing in spring. The methods of accelerating germination are low temperature stratification and rapid high temperature. Soak the seeds in warm water for 24 hours before sowing in March, or mix them with wet sand to accelerate germination indoors. After the seeds germinate, they can be sowed in the seedbed. 45kg is needed for every 1 hectare.

3. Preparation of materials for land preparation

Select sandy loam soil with loose and fertile soil and convenient drainage and irrigation, and prepare the soil carefully before sowing, so as to be flat, loose, uniform and fine. For example, sandy land and clayey land take effective soil improvement measures, such as applying more organic fertilizer, mixing a large amount of sand or guest soil to improve the physical and chemical properties of the soil. Ferrous sulfate mixed with 20 times fine soil and evenly sprinkled into the seedling bed can control seedling blight.

4. Cutting propagation and management

Spring sowing should be early, usually from late February to early March. Ditching strip sowing, the seed amount per 667m2 is 3~4kg, the depth is 4cm, the depth should be uniform, should be with trenching, sowing, with soil cover, cover soil thickness 2~3cm. In order to make the soil close to each other, the soil was suppressed after covering the soil.

The main results are as follows: 1) Cuttage seedling raising: from late March to early April in spring, meticulous soil preparation and adequate basic fertilizer are applied before cutting to make the soil loose and water sufficient. One-year-old sprouting branches were selected from fast-growing and pest-free young mother trees. generally, the branches were more than 1cm in diameter and 15~20cm in length. The upper incisions were cut flat and the lower incisions were Mal-shaped. 2-3 cuttings were inserted in each hole, so that the cuttings were dispersed, row spacing 40cm, plant spacing 20cm, spring planting should be buried deeply, smashed, less exposed, 4000 cuttings per 667m2.

2) watering: water frequently after planting, keep the soil moist, and wipe off the lower buds in time to ensure the normal growth of terminal buds. The height of one-year-old seedlings can reach 40-50cm. When the seedling height is about 80-100cm, it can be transplanted for afforestation.

3) weeding: in line with the principle of "removing early, removing small, except", weeds should be pulled out in time, and weeding should be carried out after rain or irrigation. The seedlings should loosen the soil when they enter the peak growth period, which should be shallow at the initial stage and deeper at the later stage, so that the roots of the seedlings will not be hurt. During the hardening period of seedlings, loosening soil and weeding should be stopped in order to promote the Lignification of seedlings.

4) fertilization: the fertilization of seedlings should be based on base fertilizer, nitrogen fertilizer should be applied at seedling stage, more nitrogen fertilizer, potash fertilizer or combined use of several kinds of fertilizer should be applied during seedling fast-growing period, nitrogen fertilizer and potassium fertilizer should be stopped and potassium fertilizer should be applied in the later growth stage. Topdressing should be based on quick-acting fertilizers (such as urea, potassium dihydrogen phosphate, calcium superphosphate), a small amount of time.

5) Interseedling: in order to adjust the seedling density, it is necessary to carry out interseedling and supplementary seedling. In the nursery of white wax seed breeding, generally the seedlings are secondary, and the seedlings should be good and inferior, and the seedlings with stunting, diseases and insect pests, mechanical damage and overdense seedlings should be removed. It is best to interplant seedlings when the soil is moist after rain.

6) Prevention and control: the disease is soot disease, prevention and control should pay attention to ventilation and light transmission. Pests such as aphids and shell insects can be sprayed with stone-sulfur mixture; sugar maple is sprayed with 50 ‰ fenitrothion diluted 1000 times from June to July; longicorn beetles can be dipped in 80% dichlorvos emulsion or 40% dimethoate emulsion 15-20 times into the wormhole.