Originated from the Yangtze River valley in China. I like warm, humid and semi-cloudy environment. Cold-resistant, water-resistant, moisture-resistant, drought-resistant, afraid of strong light irradiation. The optimum growth temperature is 15 ~ 25℃, and it can tolerate the low temperature of -8℃ in winter. Sandy loam with deep, fertile soil, good drainage, acid resistance and calcium content.

Second, the breeding skills:

1. sowing: collect seeds in June 10, slightly dry wings, sow in autumn or wet sand layer, and sow in February in spring. Cover the soil with 1 cm, germinate 30 ~ 40 days after sowing, and the seedlings need shade and moisture. The height of the seedlings in that year can reach 30 ~ 40 cm.

2. Grafting: it is mainly used to cultivate varieties, and the rootstock is Castanea henryi, which is 2-3 years old. Branch grafting is carried out in March in spring, and cutting or abdominal grafting is carried out when the leaves and buds of the rootstock expand; Bud grafting is carried out in August in summer, with single bud abdominal grafting as the main method, with high survival rate. That year was a seedling.

3. Stratification: It will be carried out at 5438+00 on June, and it will be stratified at high altitude. Ring peeling is carried out at the distance of 20 ~ 25 cm from the top of the branch, and it is wrapped with humus and film. The seedlings can grow in the following spring.

Third, the main points of training:

Transplanting should be carried out after defoliation in autumn and winter or before germination in spring, and large seedlings should be planted in fertile and semi-humid places. Potting should be carried out in late August after defoliation, placed in a semi-humid place, and fertilized 1 ~ 2 times to promote lush foliage. The leaves turn yellow and red after frost. If they are kept indoors, the shedding of leaves will be delayed, which can prolong the leaf viewing period.

Four, pest control:

Anthracnose, leaf spot and black spot are often harmful and can be sprayed 600 times with Bordeaux mixture or 70% mancozeb wettable powder. Pests include spiny moth, giant salamander, aphid, longicorn, etc., and chlorpyrifos is sprayed 1500 times.