Cultivation techniques of pollution-free leek as green food

The commercial quality of leek cultivated by traditional cultivation techniques is not high, because of the blind use of chemical fertilizers, pesticides and so on. Today, I would like to introduce to you the key points of pollution-free cultivation techniques of leek. The leek cultivated with new technology is not only of high quality, but also safe.

Chinese chive planting

First, the method of reproduction:

It can be propagated by seeds or ramets. Ramet propagation is to dig up the root of the old leek, cut off the lower old root and the upper leaf, and plant the leek according to a certain plant spacing after the wound heals. But the old root is long, the growth of leek is weak, and the tiller is less, so leek still needs seed propagation.

Seed reproduction, first select high-yield and disease-resistant varieties such as Pingjiu No. 2 and Xuejiu No. 4, scald the seeds with warm water of about 55 ℃ before sowing, then soak them in warm water for 12 hours, and then germinate for 2 or 3 days at a temperature of 20: 25 ℃, and then sow seeds when the seeds germinate. Spring sowing can be sowed before and after waking to Qingming Festival, and autumn sowing before and after Cold Dew. Loose and fertile loam or sandy soil with good drainage should be selected as the soil seedbed, and the bottom fertilizer should be fully applied and made into a high bed, sowing about 300 grams of leek seeds per mu and planting one mu in the field.

2. Selected sites for planting:

Although leek is a perennial persistent root plant, it also advocates reasonable flood and drought rotation with Zizania caduciflora, lotus root and other aquatic crops. At present, the crops are deeply turned over after harvest and 30 kilograms of fully mature farm manure and compound fertilizer are applied. When the leek seedlings grow to a height of 18 cm to 20 cm, they can be planted in holes or strips according to the row spacing of 30 cm to 40 cm.

III. Field management:

After the planting survived, according to the soil moisture and the growth of leek, ploughing and weeding, timely irrigation and topdressing were carried out. Rare urine dung or urea can be used to sprinkle manure with water. in order to make the newly planted leek grow vigorously and accumulate more nutrients, the leek is generally not harvested in the current year, and can be harvested when the leek grows to 25 centimeters high the next year.

Leek yellow

Fourth, shading softening:

The traditional masking system of leek uses crop straw, straw, horse dung and other materials, but the commercial nature of leek is poor, and it is not sanitary. Now generally use the arch shed covered with weeds, vegetable leaves and black film as a support, the height of the arch shed is 60cm to 70cm. Before the newly planted leek is covered with leek, leave a pile of 10 cm above the surface to cut off the leek leaf, and the ratoon leek can stay about 15 cm. After the wound is healed, it is fully watered and fertilized and then covered with weeds, straw and leek leaves. If the covering material is less, it can be covered with a layer of black plastic film, which can not only reduce weight, but also keep warm in winter. The temperature in the shed is kept at 15-20 ℃. When it is higher than 25 ℃, it is necessary to let out air, cool down and drain moisture. It usually takes only 20 to 30 days to harvest in summer and autumn, and 40 to 50 days in winter and spring. The leek on a piece of ground can only be covered once or twice a year.

After the leek was harvested, the mulch was removed, the rhizosphere soil was loosened, and the new leaves were watered, fertilized and cultivated in time to restore the vitality of the leek and lay the foundation for the high yield of the next crop of leek.

In the application of pollution-free leek fertilizer, farm manure should be added, and the use of immature human feces and nitrate nitrogen fertilizer should be prohibited.