What is the fruiting age of walnuts?

Walnuts are divided into early-maturing walnuts and late-maturing walnuts. It can bear fruit 3~5 years early; It takes 6~ 12 years for the fruit to set late. This is also related to management and climatic conditions.

Training points:

After sowing in August and September, the seeds are collected, peeled, dried and stored. Soak the seeds in cold water for 2-3 days in mid-March, take them out, mix them with wet sand, and pile them in sunny places. Cover with wet sand with a height of 30-35cm and a thickness of 1 0cm, sprinkle water1time every day to keep moist, and cover with a straw curtain or film at night to keep moist and warm. 10- 15 days later, you can start sowing. Choose 1 time every day, sow in batches, and the sowing water is sufficient. 1. The row spacing of ditches shall be 40-50 cm, and the plant spacing shall be 15-20 cm. When sowing, the two suture lines should be parallel to the ground, and the depth should be 3-5cm from the ground. After covering the soil, the soil is compacted to keep moisture. The sowing amount is about100 kg/mu, and the seedling yield is 7000-8000 plants/mu.

Grafting: Grafting is carried out from late March to early April. First, collect scions. In mid-March, when the buds are about to germinate, the 1 year-old branches with strong growth and no pests and diseases are collected as scions. After harvest, the varieties were stored in wet sand, and grafting began when walnut rootstocks germinated in early April. The thickness of the rootstock should be about 65438±0.5cm, and the grafting should be carried out at a place 10 cm above the ground. Walnut has bleeding when grafting, so it is not easy to survive. Before grafting, the rhizosphere must be cut and drained to xylem, then split or grafted, and then the wound should be tied with plastic strips, and the upper end of the scion should be painted to prevent water evaporation. After survival, the new buds should be picked off in time and the soil should be loosened when the new plants grow to more than 20cm. When the grafted seedlings grow to about 40cm, fix them with small bamboo poles or wooden sticks to prevent wind folding.

Cultivation management: The planting time is before and after germination in late March, and the survival rate of 1-2-year-old seedlings is high. After planting, water and fertilizer management should be strengthened, soil loosening and weeding should be done frequently, drainage should be paid attention to in rainy season, and pest control should be paid attention to in June and July. Pruning should be carried out in the growing period, and the dry height should be kept above 3 m. Do not prune after defoliation, otherwise it will easily cause bleeding and affect the growth of trees.

The main pests and diseases are anthracnose; Pests include aphids and moths.

The suitable range originated in Europe and Central Asia. Xinjiang and other provinces in North China are cultivated, and there is a small amount of cultivation in Yanling.

Walnut branch blight

This disease is a fungal disease. It mainly harms the branches and causes them to die. The damage rate of plants is generally around 20%, and it can reach 90% in severe cases. This disease mainly affects the growth and yield of trees.

The symptom of the disease is that after the 1-2-year-old branches are damaged, they gradually dry from the top to the trunk, and the leaves turn yellow and fall off. Dense black spots are produced on the dead branches, and mucus flows out when the humidity is high, forming black tumor-like protrusions. Bacteria overwinter on diseased branches and invade through wounds, only hurting weak trees.

The control method is to remove diseased branches and burn them centrally; The control time and chemicals used are the same as those used to control walnut anthracnose.

Walnut for garden has majestic crown, white trunk, lush foliage and shady ground, which can be used as road greening in garden.