In winter, greenhouses are cultivated in greenhouses. Because most of them are planted year after year, there are a large number of bacteria accumulated in the soil, racks, walls, etc., and become the primary sources of infestation of vegetable diseases. In particular, soil-borne diseases are more serious. At the same time, because the ground temperature is low, it is not conducive to rooting after planting and it is prone to dead seedlings or dead seedlings. In order to ensure healthy growth after the winter vegetables are planted, the following points must be observed.
Deeply plowing the soil to clean up the fallen leaves of the crop on the shed, and then deep plowing more than 30 cm, 30 to 50 cm deep loose soil.
The soil disinfection combined with soil preparation was sprayed on the ground with a 95%?f moldy spirit agent 450 times and then turned into the soil. Can also be based on the perennial situation of pests and diseases, targeted selection of carbendazim, thiram, quintozene, phoxim and other fungicides and insecticides, and appropriate amount of dry fine soil and sprinkled on the surface , and then turned into the soil.
2 to 3 days before the fumigation and disinfection, choose sunny days with sulfur, dichlorvos smoke agents, chlorothalonil smoke agents and other fumigation. After fumigation, the greenhouse was closed for 2 days, and then the greenhouse was ventilated. Pay attention to the fumigation of agricultural tools, racks, etc. into the shed for disinfection.
The basal fertilizer must be decomposed without having many pathogenic bacteria and eggs in the decomposed organic fertilizer. After the application of the basal fertilizer, the diseases and insect pests are easily caused, and the organic fertilizer is subjected to a large amount of heat in the decomposing process, which easily causes burning of the vegetable roots and burns the seedlings. Indoors a large amount of ammonia, sulfur dioxide and other toxic gases, easy to make vegetables suffer from gas harm. Therefore, when the basal fertilizer is applied before the vegetable is planted, sufficient decomposed organic fertilizer should be used.
Increase soil temperature in winter, the soil temperature is low, the vegetables are not conducive to take root after planting, and the soil moisture is very high, prone to rooting phenomenon. Therefore, before the planting of vegetables, sunny closed enclosures should be selected for 2 to 3 days to increase the temperature inside the shed so as to increase the temperature of the soil so that the vegetables will be rooted and rooted as soon as possible after planting.
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