Rational Fertilization Technology for Greenhouse Vegetables

The use of greenhouses, greenhouses, sheds, sheds and other facilities for the cultivation of vegetables in protected areas is likely to cause soil salinization and continuous cropping obstacles. To ensure the high yield and stability of vegetables in the protected areas in the current season, it must be adopted to overcome or alleviate soil salinization and Continuous cropping obstacles are the main fertilization techniques. First, increase the application of organic fertilizer It is best to use organic fertilizers with high cellulose and high carbon-nitrogen ratio to enhance soil buffering capacity, prevent salt accumulation, and delay the process of soil salinization. 2. Deeply plow the soil After the vegetables are harvested, plunge the soil deeper and turn the salt-rich surface soil to the lower layer. Turn the lower layer of soil containing relatively little salt to the top and reduce the salt damage. Third, salt and salt washing Xiashu after the end of the harvest, the use of change in space, remove the film, in the rainy season after several days of sun and rain, it will be able to eliminate the effect of soil salinization. Or in the hot season, after the large water immersed in the ground, the film is covered on the ground to increase the temperature under the membrane, not only to wash the salt, but also to sterilize. Fourth, the deep application of fat fertilizer base fertilizer for the base fertilizer to deepen, top dressing as much as possible, "eat less meals." It is best to mix chemical fertilizers with organic fertilizers and then apply them to the ground. Then, it is difficult to apply fertilizers. It is necessary to strictly control the amount of each fertilizer and not to over-fertilize all at once, otherwise the concentration of soil solution will increase. 5. Covering the ground with a mulching film on the ground has obvious effect on inhibiting salt accumulation on the surface of the soil.