Shelter Management "Four Not Reversed"
As the temperature gradually decreases, many vegetables are transferred into the greenhouse. Every year at this time, vegetable farmers often consult with the farmers about the fertilization and management of greenhouse vegetables. Here, the author reminds the farmers that the management of the sheds should be done. reverse". Dredger watering and transplanting colonization order Can't be reversed Many vegetable farmers are accustomed to spreading organic fertilizers in the shed, then applying chemical fertilizers, and then ploughing. After leveling, the ridges are planted and seedlings are planted and finally watered. This can easily make the roots of vegetable seedlings in contact with fertilizers, causing burning of roots, loss of water, or ammonia poisoning. If the water is first transplanted and then transplanted, when the fertilizer is dissolved and diluted with water, it is not easy to produce gas harm, and it is not easy to cause water loss in the roots caused by burning roots. Therefore, it is advisable to pour the water first, then plant the seedlings, then use the amino acid humic acid fertilizer to irrigate the root, pay attention to 7 to 10 days irrigation once, even irrigation 3 to 4 times. Farmers can also mix superphosphate, calcium magnesium phosphate fertilizer and farmyard fertilizers, which is not only safe but also has good fertilizer effect. Phosphorus and potassium application rates Can't be reversed The ratio of phosphorus and potassium in the formation factors of melon vegetable production is 1:2 to 3, and the utilization rates are 20% to 30% and 50% to 70%, respectively. Therefore, in the fertilization process, we must pay attention to the application of more potassium fertilizer, reasonable with the application of nitrogen fertilizer, phosphate fertilizer, this is particularly important after sitting fruit, partial love of the phenomenon of diammonium phosphate must be avoided, and should be reasonable with the application of biological fertilizer To regulate nutrient supply. Pest control, nutrient regulation and watering order Can't be reversed If watering is in front and pest control and nutrient regulation are in the back, on the one hand, the plants are in excess of nutrient growth, reproductive growth is insufficient, the length of the internodes is light, the leaves are thin, the stalks are fine, and the heavy ones fall and fall; Due to the increased humidity in the shed after watering, the diseases such as Phytophthora, Pythium, Downy Mildew and other pathogens are prone to increase, resulting in aggravation of the disease. Therefore, we must first use drugs to prevent diseases and insect pests, regulate growth with inhibitors, and then water and fertilize. Principles of application of organic fertilizers and fertilizers Can't be reversed First of all, organic fertilizers must be the mainstay, supplemented by chemical fertilizers; secondly, organic fertilizers must be decomposed. The application of unripe organic fertilizers such as chicken manure, with a large number of salts and pests, such as sodium chloride, Phytophthora, nematode eggs, etc., to increase the difficulty and cost of pest control.
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