Degradation of soil in greenhouse and its restoration technology

At present, due to the highly intensive closed management of vegetable greenhouses and the blind over-investment of chemical fertilizers, the problem of soil degradation is very prominent, mainly due to soil salinization and acidification, destruction of soil biodiversity, accumulation of self-toxic substances in soil, etc. Comprehensive management measures should be taken to repair the soil degradation in greenhouses.


Linyi Fertilizer Network Copyright
Control soil salinization and acidification by controlling the amount of fertilization, fertilization period and the combination of organic and inorganic fertilizers, balanced application of NPK fertilizer, rational application of organic fertilizer and chemical fertilizer; through appropriate application of organic fertilizer, straw returning and deep tillage Salt and other measures to improve soil texture, increase permeability, reduce soil salinization; through different types of vegetable rotation, vegetable rotation and planting short-lived sweet corn, Sudan grass, eucalyptus, and leek in the two seasons of vegetable leisure season Filling in crops, etc., is conducive to improving soil traits. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright
Integrated water and fertilizer management The roots of vegetables are mostly shallow and sparse. The solanaceous fruits, melons and fruits are harvested many times. The water and fertilizer should be multiplied several times to implement integration and comprehensive management. This will not only improve the efficiency of fertilizer and water use, but also eliminate or reduce soil degradation and environmental pollution caused by large water and large fertilizer. It is recommended that in the case of large-scale solanaceous fruit, melon and fruit vegetables, in the case of simultaneous fertilizer and water, a small amount of multiple times, the base fertilizer should be applied with 4000~7000 kg of organic fertilizer, 9~11 kg of urea and 10~12 kg of potassium sulfate. If the micro-irrigation technology is adopted, the application rate of fertilizer water can be further reduced. Generally, the organic fertilizer is applied with 300~400 kg of organic fertilizer, and each application of urea is 7-8 kg. The application amount of potassium sulfate can be more than that of urea. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright
Straw bioreactor and straw returning straw bioreactor technology is to ditch under the colonization line or around the greenhouse, put straw and fermented composite microbial agents, and mix the material C/N ratio, moisture and ventilation conditions like high temperature compost, and cover the film. And punching, straw fermentation under field conditions. The decomposed straw can be changed into soil and used as fertilizer; the released carbon dioxide is the carbon source fertilizer urgently needed in the early spring greenhouse; the fermentation heat can increase the ground temperature by 3 °C ~ 5 °C. This technology has been promoted and applied in greenhouses in Shandong and northern China. Linyi Fertilizer Network Copyright

Linyi Fertilizer Network Copyright
Lime nitrogen-straw disinfection Lime and nitrogen fertilizer is a kind of delayed-acting nitrogen fertilizer containing calcium and having insecticidal sterilization effect. In the greenhouse, the 60 kg of lime nitrogen per acre and 600 kg of straw can be mixed into the soil. After proper irrigation, the ridges are covered and swelled. This can eliminate or reduce the physiological diseases caused by calcium deficiency and magnesium deficiency in the application of nitrogen fertilizer; the fertilizer itself and the heat generated can also increase the soil temperature and kill the nematodes, and improve the stagnation effect .

Linyi Fertilizer Network Copyright
In addition to the above-mentioned treatment measures, the application of bio-organic fertilizers and regulators can also utilize functional organic fertilizers rich in antagonistic microorganisms and crop residues (such as tobacco straw) which are repellent, and can be used for vegetable cultivation when planting seedlings. A root zone protection zone. Practice has proved that this can effectively prevent nematodes and diseases, restore soil microbial activity in root zone, and improve the ability of roots to absorb and utilize soil water and fertilizer. Users can use it according to their own conditions. Linyi Fertilizer Network Copyright

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Step Lights

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