In the cold winter and spring season, the use of biological bacterial fertilizer can not only activate the fixed nutrients in the soil, but also benefit the growth of the root system, but it cannot be used blindly. It should be determined according to the soil environment of different sheds, otherwise it is likely to Spend money but no effect. The following introduces the application technology of biological bacterial fertilizer in winter and spring.
I. Soil moisture
Excessive or inadequate soil moisture will affect the application of biological fertilizer. Because most of the biological bacteria in the biological fertilizer are aerobic bacteria, its vitality is only active when the soil is wet or dry. Therefore, after applying the biological bacterial fertilizer, we must pay attention to reasonable watering. It is best to choose small water in the morning on a sunny day. This will not only increase the ground temperature, but also dehumidify the air. Note that it is best to paddle after watering to increase the permeability of the soil, which is conducive to the effect of biological bacteria.
Soil temperature
The biological fungi in biological fertilizer are generally the most active in the soil at 18 ℃ -25 ℃, the life activity begins to decrease below 15 ℃, and the activity ability is very weak below 10 ℃, even in dormant state. Therefore, after applying bacterial fertilizer to vegetables in greenhouses in winter and spring, attention should be paid to regulating the ground temperature. First control the temperature in the shed, and use the temperature to promote the rise of the ground temperature. Generally, the temperature in the shed should be kept at 25 ° C-30 ° C during the day. The temperature in the shed is low at night. In order to avoid the loss of ground temperature and maintain a constant ground temperature, in addition to film mulch, crop straw can be covered in the operation line.
Third, soil pH
Soil acidity or alkalinity is not conducive to the growth and reproduction of biological bacteria. When the pH of the soil is between 6.5-7.5, it is most suitable for the reproduction of biological bacteria. Vegetable farmers can modify it according to the condition of the soil, so that the pH of the soil reaches 6.5-7.5 to ensure the large number of biological bacteria to reproduce.
Fourth, increase the application of organic fertilizer
After applying biological bacterial fertilizer, pay attention to increasing the application of organic fertilizer. Because the biological bacteria can exert their effects under the premise of rich soil organic matter. Therefore, before planting vegetables, we must pay attention to applying organic fertilizer, generally about 5000 kg per mu.
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