The order of watering and transplanting and planting cannot be reversed. Many vegetable farmers are accustomed to sprinkle organic fertilizer in the shed, and then apply chemical fertilizer, then plow, level, ridge and plant seedlings, and then water. This makes it easy to contact the roots of vegetable seedlings with fertilizer, causing root burning, water loss, or ammonia poisoning. If the fertilizer is watered first and then transplanted, the fertilizer will not be easy to produce air damage after the water is dissolved and diluted, so as to avoid root loss caused by root burning.
It is recommended to water the soil first, then plant the seedlings, and then irrigate the roots with the amino acid humic acid fertilizer solution. Pay attention to irrigate once every 7 to 10 days and irrigate 3 to 4 times in a row. Vegetable growers can also mix superphosphate, calcium magnesium phosphate and farmyard manure for retting, and then apply it, which is not only safe, but also effective.
The application rate of phosphorus and potassium cannot be reversed in the production process of fruits and vegetables. Nitrogen is the key to plant formation, and phosphorus and potassium are the main elements for fruit formation. According to relevant information, the ratio of phosphorus and potassium in the production factors of melons and vegetables is 1:2 to 3, and the utilization rate is 20% to 30% and 50% to 70%, respectively. Therefore, in the fertilization process, we must pay attention to applying more potassium fertilizers, and rationally applying nitrogen and phosphate fertilizers. This is particularly important after the fruit is set. The phenomenon of favoring the application of diammonium phosphate must be avoided. In addition, it is necessary to use biological fertilizers reasonably to regulate nutrient supply.
The order of pest control, nutrition regulation, and watering cannot be reversed. If watering is first, and pest control and nutrition regulation are second, then on the one hand, the plant will have excessive nutrient growth and insufficient reproductive growth. The lighter ones have long internodes and thin leaves. The stalks are thin, and the heavy ones will drop flowers and fruits; on the other hand, due to the increase of humidity in the shed after watering, it is easy to accelerate the reproduction of phytophthora, pyromyces, downy mildew and other pathogens, which will aggravate the disease. Therefore, it is necessary to use drugs to prevent pests and diseases, use inhibitors to regulate growth, and then water and fertilize.
The principles of application of organic and chemical fertilizers cannot be reversed. First, organic fertilizers must be the mainstay and chemical fertilizers are the supplement. Secondly, organic fertilizer must be decomposed. Applying immature organic fertilizers such as chicken manure, with a lot of salt and pests, such as sodium chloride, phytophthora, nematode eggs, etc., increase the difficulty and cost of pest control.
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