Technical points of planting leek in winter

The cultivation of leek is the cultivation method of raising the root of Chinese chive in the open field, returning to the root after many times of frost, moving the root of leek into the trench, sunny border and other protective facilities in winter, and using the stored nutrients to produce fresh leek under the condition of low light.

? First, the leek trench is ready to choose leeward and sunny, flat and dry land (can also be in the courtyard), dig trenches along the east-west direction, the trench is 3 to 4 meters wide and 1.25 meters deep, the length can be determined according to the number of leek roots, generally 12 meters long, divided into seven small beds. The soil layer at the bottom of the trench should not only maintain moisture but also facilitate drainage. The four walls of the trench are flattened, and the south side of the bottom is slightly higher than the north side, which is convenient for watering. After digging, the north side is covered with a roof with a width of half the width of the trench to facilitate daylighting. The roof of the shed is covered with corn straw 10-13 cm thick, and then covered with mud. The front should be 33 cm above the ground, forming a sloping roof high in the south and low in the north, and then immediately covered with grass grass.

? Second, the leek root enters the trench

1. Tie it up. After the Beginning of Winter, he cleared the dead leaves in front of Lesser Snow, dug up and sorted out the leek roots, removed insect roots and diseased roots, selected strong roots to straighten out the ends of the stem plates and tied them into square bundles.

two。 Get into the trenches. Place the tied leek roots tightly at the bottom of the trench and fill the gap with loose roots. Heap the earth ridge between each small bed to prevent the string of water when watering.

3. Waterway setting and watering. The south side of the border can be lined with three tiles to form a U-shaped channel leading to the trench, so that it does not have to be exposed when watering. After the general light snow festival into the trench, then first irrigate a small amount of water, the water depth of the leek root 1 to 3 height, the border ridge will be solid. Pour water again after 1 or 2 days, and the depth of the water should not exceed the root of the leek. After water infiltration, the rotten fine horse dung is evenly scattered on the leek root, with a thickness of 10 to 13 centimeters, with a shovel, and then cover the dried leek leaves, grain straw and wheat straw with a thickness of 10 centimeters and 13 centimeters, and the cover is slightly thicker around, so that the leek root can sprout evenly. Finally, the mouth of the trench was covered with grass.

? Third, leek trench management when leek yellow grows to a certain height, the dung should be removed from the field, and the management before and after dung should be strengthened.

1. Before getting up the feces. After entering the trench, it is generally not watered to increase the temperature. It was exposed during the day and covered at night. A Reed mat should be built after the unveiling to prevent the cold wind from invading. After 4 ~ 5 days, the temperature of horse manure fermentation was controlled at 35 ℃ ~ 40 ℃, and some mulch should be removed if the temperature was too high. The middle and surrounding coverings can also be replaced to ensure a uniform temperature in the border. After about 10-12 days, when the bud is 5-6 cm high, the temperature will rise rapidly, strictly below 48 ℃, and all the mulch will be removed one after another. When you pick up feces, use a wooden rake to get out, don't hurt the buds.

two。 After getting up the feces. Pour a little water first, cover it all day in 2-3 days, and then cover it from short to long, from 2 hours a day to 6-7 hours a day. Pay attention to cover on rainy days. The time for capping every afternoon is when the leek leaves begin to freeze. Watering time should be controlled when there are no dewdrops on the leaves in the morning and when the leaves wilt slightly at noon, but the amount of water should not be too large to prevent rotten leaves, watering once every 5-6 days. Fourth, harvest and post-harvest management 30-40 days after entering the trench, that is, about 20 days after the first harvest. When harvesting, first set up a plank in the trench, step on the plank, harvest at 1 cm above the stem plate, do not hurt the stem plate, the first crop yield is about 100 kg, the second crop is 50 kg, and the third crop is 25 kg. After the first harvest, the sun and night cover for 2-3 days, and then cover 3-5 days day and night. The subsequent management is the same as that of the first crop, except that a small amount of chemical fertilizer can be applied during watering. After harvesting 3 and 4 crops, around the vernal equinox, the leek root was dug out and planted in the field according to 23 cm row spacing. The plant spacing was 1 cm 2 cm, and the depth was 1 cm 2 cm below the ground. After planting, the soil was compacted. Before and after the light snow festival, dig the roots into the trenches, which can be used for 2 to 3 years in a row.