The sowing time of leek can be divided into three types: spring sowing, summer sowing and autumn sowing.

1. Spring sowing: Early sowing is better than late sowing. When the local temperature is stable at 5- 10℃ in spring, the soil has not been completely cleared, and the surface is wet before the pulp returning period, which is easy to sprout. This sowing method also avoids grass damage. Because leek seedlings emerged quickly after sowing, the temperature at that time was not suitable for weeds to germinate, resulting in a time difference. So I suggest you try to use this sowing method.

2. Summer sowing: Generally, cucumber and tomato are sown after stopping the garden. At this time, the high temperature is prone to drought and waterlogging, and the sowing amount is about one-third more than that in spring. It is not easy to cover the soil too thick and keep the soil moist, which is beneficial to the whole seedling.

3. Autumn sowing: Generally, sowing is carried out before and after beginning of autumn, and the sowing amount is twice as much as that in spring, and management is mainly based on wet and dry conditions. Pay attention to grass damage in the later stage. Autumn sowing is generally not recommended.

Miaochang management

Leek seedlings are about 5 cm high. Water them gently and loosen the soil in time. After 10 cm, it can be watered 2 ~ 3 times with decomposed manure or topdressing urea, and 0.5 ~ 1 kg of crystal trichlorfon can be applied per mu, and water can be added to kill pests such as leek maggots. After seedling height 15cm, control irrigation to prevent white lodging. Weeds should be pulled out in time. When the seedling height is about 65438±0.2cm, use 0.5 ~ 0.75 kg of 25% herbicide diethyl ether to control weeds, or use 0.65438±0.5kg of 33% herbicide emulsifiable concentrate to spray the ground after sowing and before emergence.

Reasonable colonization

Chinese chives are planted in plots with fertile soil and convenient irrigation and drainage, and 4 ~ 5 cubic meters of decomposed farmyard manure is applied per mu, and leveled for border planting. The boundaries are 2 ~ 3m wide, and every three boundaries are grouped, and a cold-proof belt with a width of 1 m is set on the north side. Transplanting from late June to early July, cutting off the end of fibrous roots before planting, and arranging bulbs into small stems. Planted in flat bed, row spacing 13 ~ 20cm, hole spacing 10 ~ 15cm, and 6 ~ 8 plants per hole are suitable. It is advisable not to bury the leaf sheath when planting, and water it in time after planting.

Tiantuan management

After the new leaves of leek are released, water slowly, intertillage and moisturize, and keep the soil dry and wet. After autumn, leek grows most vigorously, so it is necessary to fully supply fertilizer and water. After that, the temperature will gradually decrease and the plants will grow slowly. Keep the surface dry. Leek needs moderate light intensity and strong shade tolerance. But the light is too weak, the accumulation of photosynthetic products is less, the tillers are few and weak, the yield is low, and it is easy to premature aging. Too much light, too high temperature, too much fiber and poor quality.

Timely harvest

The number of times leeks are harvested each year depends on the growth, fertilization and market situation of leeks. In winter and spring, leeks can be harvested three times in the arch shed. Although the quality is good in autumn, it is suitable to harvest l-2 crops in order to cultivate rhizomes and lay a material foundation for the growth of arch shed. Leek is cut with 7 leaves 1 heart as the standard. Harvesting in the morning is the best. It is appropriate to cut the yellow leaf sheath 3-4cm above the bulb. After each cut, it should be slightly higher than the previous crop to ensure normal growth. The yield of 1-2 before planting is low, and the growth period is 3-6 years, and the yield is the highest. /kloc-enter the aging stage after 0/0 years, and transplant it in time.