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First, the application of bacterial fertilizer should pay attention to the actual situation in the field. For soils with high sulfur content and rust fields, it is not advisable to apply biological fertilizers because sulfur can kill biological bacteria. For the paddy paddy field, it is generally not necessary to spread the fertilizer, and the spray method can be used, and the effect is more obvious.
The second is to pay attention to the shed temperature, ground temperature and water temperature. The optimum temperature for applying the bacterial fertilizer is 25 to 37 ° C, lower than 5 ° C, higher than 45 ° C, and the application effect is poor. It is not suitable for the application of crop fields under high temperature, low temperature and drought conditions. At the same time, the optimum temperature of nitrogen-fixing bacteria should be mastered, and the soil water content is about 60-70%.
Third, it can not be mixed with other pesticides to prevent live bacteria from killing. Be careful not to mix with fungicides, insecticides, herbicides and sulfur fertilizers, such as potassium sulphate and straw ash, because these drugs and fertilizers can easily kill biological bacteria. At the time of application, if the application of the fertilizer is contradictory to the prevention of pests and diseases, weeding may be carried out first, and then weeding and weeding after 48 hours. If seed dressing, avoid mixing with seeds that have been mixed with fungicide. At the same time, it should be prevented from being mixed with unfertilized farmyard manure, because farmyard manure will ferment in the process of decomposing, which will directly kill the bacteria.
The fourth is due to the quantity. For the application of biological fertilizers in the field of chemical fertilizer for many years, it is not possible to reduce the application of chemical fertilizers and organic fertilizers in large quantities. Because crops are dependent on chemical fertilizers, the replacement of nitrogen fertilizers with biological bacterial fertilizers cannot be adapted at once. Therefore, the substitution amount should be 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 due to the time. Biological bacterial fertilizer is not a quick-acting fertilizer, so it is best to apply it in the nutrient critical period of the crop and 7 to 10 days before the large absorption period. At the same time, different application methods should be used for different crops or different crops. The thickness of the leaves of the crop leaves and the thickness of the wax of the leaves will affect the use effect.
Huaxian Agricultural Technology Promotion Center Lu Shuguang
Principle of application of bacterial fertilizer
The bacterial fertilizer is a kind of pollution-free new compound biological fertilizer which is prepared from the natural nitrogen-fixing bacteria species and scientifically formulated and combined. During the application process, the following five points must be noted:
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