Greenhouse using bacteria pay attention to essentials?
Special principles for the application of the fertilizer for winter greenhouse vegetable production are described below:
Bacterial fertilizer is produced through a special process, such as bacterial fertilizer by scientific formula, combined processing developed a new pollution-free biological compound fertilizer. In the application process, the following five points must be noted:
First, the application of bacterial fertilizer should pay attention to the actual situation in the field. For high-sulfur soils and rusted paddy fields, it is not appropriate to apply biological bacterial fertilizers because sulfur can kill biological bacteria. For flooded paddy fields, it is generally not necessary to apply fertilizer. Spraying can be used. The effect is more obvious.
The second is to pay attention to the greenhouse temperature, ground temperature and water temperature. The optimum temperature for the application of bacterial fertilizer is 25-37°C, which is lower than 5°C and higher than 45°C. The application effect is poor. It is not suitable for crop fields under high temperature, low temperature and drought conditions. At the same time, the optimum temperature for nitrogen-fixing bacteria should also be known. The soil moisture content is about 60 to 70%.
Third, it cannot be mixed with other pesticides to prevent death of live bacteria. Be careful not to mix with fungicides, insecticides, herbicides, and sulfur-containing fertilizers, such as potassium sulfate, and straw ash, because these drugs and fertilizers are very easy to kill. In the application, if the application of bacterial fertilizer is in contradiction with pest control and weed control, the fertilizer may be applied first. After 48 hours, the herbicide will be used for weeding. If seed dressing, do not mix with seeds that have been mixed with fungicide. At the same time, it should be prevented from mixing with untransformed farmyard fertilizers, because the farmyard manure will ferment in the process of maturity, which will directly kill the bacteria.
The fourth is based on quantity. For biological fertilizers applied to fields with chemical fertilizers for many years, chemical fertilizers and organic fertilizers cannot be greatly reduced. Because crops have a dependence on chemical fertilizers, replacing nitrogen fertilizers with biological bacterial fertilizers cannot be applied at once. Therefore, the amount of substitution should be achieved. The first, second and third years replaced 30%, 40% and 60% respectively. Phosphorus and potassium fertilizers can only make up and cannot be reduced.
The fifth is based on time. Biofertilizer is not a fast-acting fertilizer, so it is best to apply the crop 7 to 10 days before the critical period of nutrition and a large number of absorption periods. At the same time, different application methods should be used for different crops or different stages of the same crop. The amount of leaf hair on the back of the crop and the thickness of the leaf wax will affect its use effect.
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