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Winter Leek Coverage Management Measures
First, the preparation before covering. After the leeks of leaves of leeks thaw several times, the leeks of the leeks on the stalks of the leeks were scooped up and then razed with bamboo vines. If the soil has frozen, you can cover the grass and other objects at night. After the thawing of the soil, open the roots and dry it for 5-6 days so that the bulbs can withstand the sun and ice, which will help break the dormancy period and make the crops appear neat and tidy. You can also kill some of you. In the first 2-3 days before the application, water can be sprayed with 50% phoxim 800 times solution or 90% crystal trichlorfon 500-600 times, and then the organic fertilizer is mixed with the soil and the rotted water is poured. Ready to cover the film. Yangshuo winter pupa is covered by heavy snow until the winter solstice, and small sheds are covered by winter cypresses from the cold to the beginning of spring. Second, after the management of the cover 1, promptly uncovered grasshopper: cover the temperature of the cockroach daytime to master 20-25, not more than 30, not less than 6-8 at night. According to the mild weather conditions, we must uncover the grasshopper in time. Generally, before the leeks are unearthed, the grass pods will be uncovered and covered early. After the frost on the pods is opened in the morning, they will be uncovered at 3-4 o'clock in the afternoon to improve the temperature and promote early-onset hair loss. After the leeks are unearthed, the cover must be released and the time for seeing light should be prolonged so as to increase the yield. In the case of rain and snow, as soon as the rain and snow stop, the snow on the haystacks must be removed and the grass be raised; It is also necessary to properly unveil the grasshoppers to let them see the light. 2, pay attention to cleaning film: First, the dust can be accumulated on the film, broken grass to increase the transparency; second, the water droplets can be condensed in the film on the diaphragm to facilitate the increase in brightness. Normally, it is necessary to beat 5-6 times a day and clean it once. No matter whether it is sweeping or hitting, it should be light and hard to prevent damage to the film. 3, timely ventilation: When the leek grows to 29 cm high, when the temperature reaches 30 o'clock, it is necessary to ventilate behind the scorpion behind the scorpion or two appropriate openings. Eli cools and disperses moisture, supplements carbon dioxide in the urine, and prevents the occurrence and spread of gray mold and epidemics. 4, timely control of leek gray mold disease and disease: First, the cultivation of disease-free strong seedlings, and second, strict control of temperature and humidity, the third is the discovery of sporadic plant diseases in the sputum, should be warm and windless days of noon spraying control. For leek gray mold, use 50% carbendazim WP 600 times or 70% dexamethasone WP 700 times, 50% sulfacin WP 1500-2000 times, focus on spraying new leaves And the surrounding soil; for the leek disease, 40% of aluminum phosphate wettable powder 500-600 times or 25% of metalaxyl wettable powder 600 times, 85% of methylfreezing manganese zinc wettable powder 500 times of spray or irrigation Root; more than 40-50 kilograms of the agent per mu of liquid, spray once every 7-10 days, continuous spraying 2-3 times. 5, soil: the use of soil method to soften the white, can improve the quality of cover. The specific approach is: with the growth of leeks, the sieving, drying, warming of the fine soil will be cultivated at the base of leek. Third, harvesting and management. Generally, it takes about 30-35 days to cover the first knife from Yangshuo cover and about 25-30 days for the small arch. Cutting the leeks to select the noon of sunny weather; with the removal of the film with the cut, how much to cut to prevent the occurrence of frost damage. After the first knife is harvested, apply the appropriate amount of fine fertilizer, and apply the appropriate amount of glutinous flour to the surface, cover it with a thin film, and water it as appropriate. After another 25 days, the second knife will be cut. After the second knife cut, the third knife is cut after about 30 days. No more cutting after cutting three knives. After three knives, the weather has warmed up. Covers can be removed and fertilizer and water management can be strengthened to restore growth.