Cotinus coggygria seeds are planted directly in the field in winter and watered. Can they germinate in spring? I come from Xingtai area and need expert advice.

I don't think so, because cotinus coggygria usually sows in early spring.

Cotinus coggygria is a shrub or small tree, which is an important ornamental red leaf tree species in China. Cotinus coggygria leaves turn red in autumn, with bright colors. The lavender feathery pedicel of cotinus coggygria is not only of high ornamental value, but also beautiful after flowering, and can stay in the treetops for a long time. When planted in pieces, it looks like countless tulle around the forest, so it has the reputation of "smoke tree"

Cotinus coggygria has strong environmental adaptability and rapid growth. The propagation of cotinus coggygria is mainly based on sowing and cutting, and layering and branching can also be used for propagation. The following Hua Mu China net will introduce the propagation method of cotinus coggygria seeds:

Seed preparation before propagation of cotinus coggygria;

From late June to early July, when the fruits turn yellow and brown, harvest them in time. Seed collection, air drying, impurity removal, screening, selection, air drying, and storage in a dry and cool place for later use, and pest and rodent prevention.

Soak the seeds before sowing. Cotinus coggygria pericarp has a solid palisade cell layer, which hinders the infiltration of water. /kloc-In the first ten days of each month, put the full and clean seeds into clean water, knead them by hand for a few minutes, wash off the adhesions on the seed coat, filter the clean water, change it into clean water, add a proper amount of potassium permanganate or carbendazim, soak for 3 minutes, take out the fine sand mixed twice, mix them evenly, store them in the shade, naturally freeze them and treat them at low temperature. By mid-February, choose the place with the leeward facing the sun, dig the pit first, then move the seed sand mixture into the pit, cover it with fine sand of about 10cm, and maintain its good ventilation and humidity. Accelerating germination in this way can improve its survival rate.

Selection of propagation and sowing place of cotinus coggygria;

Choose loam with high terrain, fertile soil, good water and fertilizer conditions and good drainage as the nursery ground. When the soil viscosity is high, appropriate amount of fine sand or vermiculite can be added to improve the soil, and the suitable ploughing time is in the middle of March. When turning over the soil, apply sufficient base fertilizer, about 3000㎏ decomposed organic fertilizer and 30 ~ 50 ㎏ compound fertilizer every 667m2, and carefully pick out impurities with a deep rake.

Cotinus coggygria seed sowing:

Cotinus coggygria seedlings are generally cultivated in low seedbeds. In order to facilitate lighting, seedbeds are planted in the north-south direction. The width of seedbed is 1.2m, depending on the terrain conditions. The bed surface is lower than the trail 10 ~ 15cm, and the suitable sowing date is from late March to early April. Disinfect the soil with formalin or carbendazim 3-4 days before sowing, and water the soles. After the water is drained, the seeds mixed with sand are ditched with a pull wire according to the row spacing of 33cm. After planting, cover the soil about 1.5 ~ 2 cm, and cover it with plastic film after gently pressing and leveling. At the same time, a drainage ditch is opened around the seedbed to facilitate drainage in autumn. Be careful not to water the seeds before germination. Generally, seedlings emerge 2-3 weeks after sowing.

Seedling management of cotinus coggygria;

Strengthen the management of irrigation and drainage: after the seedlings are unearthed, determine the reasonable irrigation amount and irrigation time according to the water demand and weather conditions at different stages of seedling growth. Generally, the seedlings should be fully irrigated in the early growth stage, but irrigation should be strictly controlled within 20 days after the seedlings are unearthed, and irrigation should be reduced as much as possible without causing drought, generally watering once every 10 ~ 15 days; In the later stage, watering should be properly controlled to facilitate seedling growth and overwintering. In autumn when there is more rain, attention should be paid to drainage to prevent root rot caused by accumulated water.

Disease control of cotinus coggygria propagation;

Common diseases and insect pests of Cotinus coggygria mainly include aphids, damping off, powdery mildew and mold.

(1) Aphids: Harm leaves, tender stems, flower buds and terminal buds, make leaves shrink, curl and fall off, and even cause plants to wither and die in severe cases. Prevention and control methods: old bark can be scraped off in early spring, damaged branches can be cut off, and overwintering eggs can be eliminated; When aphids occur in large quantities, 40% omethoate, omethoate 1 time, 50% malathion emulsion or 40% acephate 1000- 1500 times, or rotenone/kloc-0 every 5 days from May to August.

(2) Cotinus coggygria damping-off: it causes the cortex of root or root neck to rot, and in severe cases, it causes the diseased seedlings to wilt and die. Control methods: clean the garden, treat the diseased plants in time, and spray 50% carbendazim and 50% wettable powder 500- 1000 times or1:1every1000 days.