The vegetables in winter sheds are changed, and the time is tight. The vegetable growers often pay insufficient attention to some items, resulting in poor growth after the vegetables are planted. What should you watch out for when changing vegetables in winter? The following points must be done:
First, the disinfection in the shed must be thorough. After the vegetable was pulled out of the garden, the vegetable grower rushed to catch the estuary, so that the squat vegetables were listed as soon as possible. Most of them rushed to plant after gardening, but neglected the disinfection work of the greenhouse and laid a hidden danger for the outbreak of vegetable diseases. When changing vegetables, it is necessary to clean up the dead leaves in the shed and do disinfection. After the vegetable is pulled out, add 1,000 grams of sulphur powder and sawdust every 667 square meters. Mix well and put it in various points in the shed. Put the used agricultural implements, racks, etc. into the shed, and ignite the fire. Closed greenhouse fumigation 12 hours. Can also use 45% of the chlorothalonil smoke agent 400-600 grams per 667 square meters fumigation sterilization, fumigation when sealed greenhouse for 2 days, 2 days before planting, open the ventilation vents. The soil in the shed is also to be sterilized. The ground can be sprayed with 30% Thiophanate 1000 times or 95% Hymex Agent 450 times. After disinfection, planting vegetables has a good effect. In greenhouses with underground pests, appropriate amounts of pesticides can be applied to the vegetables prior to colonization to prevent the harmful insects in the ground.
Second, the soil should be deep turned. Many vegetable farmers have failed to fully plow their sheds due to a hasty change. They have only plowed the vegetable cultivation rakes. This is not appropriate. It's best to deep-flip it by hand or use a rotary cultivator to fully plow the shed.
Third, basal fertilizer must be fully cooked. In winter, if the temperature is low, chicken manure is used when applying basal fertilizer, and chicken manure is often not thoroughly fermented outside the shed. In winter, greenhouses are insulated and relatively airtight. If these inadequately cooked chicken wastes are used, it is very easy to cause harmful gases such as ammonia to accumulate in the sheds and to smoke vegetables. Therefore, when basal fertilizer is used for vegetables, it is necessary to pay attention to see if the chicken manure has fully decomposed, and the appearance is yellowish-brown odor which is not fully decomposed chicken manure, and must be avoided. In order to increase the effect of chicken manure, 1000 g fertility can be mixed with 2 m3 chicken manure. Certain compound fertilizers with excessive nitrogen content should not be used as basal fertilizers during this period.
Fourth, vegetables must be warmed before planting. The lower ground temperature in winter is not conducive to the rooting of vegetable seedlings after planting. Excessive humidity at low temperature can also cause root collapse. Therefore, the greenhouse must be closed two days before the colonization of the vents, warm to the ground, as soon as possible after planting vegetables rooted new roots, early emergence of seedlings.
SHAANXI HAIBO BIOTECHNOLOGY CO., LTD , https://www.rozenbio.com