Method for improving soil fertility of greenhouse and preventing soil disease

Abstract

The invention discloses a method for improving soil fertility of a greenhouse and preventing a soil disease. The method comprises a biogas slurry storage step, a soil anaerobic fermentation raw material sowing step, a step of conducting soil tillage on evenly-scattered anaerobic fermentation raw materials, a step of conducting flood irrigation on a cultivated filed through the biogas slurry and water, a step of covering a mulching film for sealing, a step of depressing the greenhouse, and a step of uncovering the mulching film to again conduct soil tillage. The method has no chemical composition residuals, can not damage strain balance of various beneficial bacteria in the soil, does not enable the beneficial bacteria to produce drug resistance, is stable in disinfection effect, can play a role of disinfecting on a deeper soil layer, is low in disinfection cost, can be used in a certain area in large-quantity and high-strength modes, solves the problem that biogas slurry consumption in a biogas project is difficult, improves soil physical and chemical properties and acid-base equilibrium, improves disease-insect resistance of the crop and stress resistance of a bad condition, can kill harmful bacteria, reduces the disease, improves absorption efficiency of the crop on various fertilizer components, improves fertilizer efficiency of the fertilizer and saves fertilizing cost.

Description

technical field [0001] The invention belongs to the technical field of greenhouse planting soil improvement and comprehensive utilization of biogas engineering products, and in particular relates to a method for improving soil fertility in greenhouses and preventing and controlling soil-borne diseases. Background technique [0002] Continuous cropping obstacle refers to the phenomenon of crop yield and quality decline that occurs when the same species or the same family of crops are continuously cultivated in the same planting land, especially in greenhouse vegetable cultivation. The reason for continuous cropping obstacles is mainly due to the increase of infectious harmful bacteria populations in the soil and the destruction of the microbial population balance in the soil. In production, techniques such as reasonable crop rotation, selection of disease-resistant varieties, soil replacement, biological control, and soil disinfection are often used to overcome obstacles to c...

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent "A Method for Using Biogas Slurry to Correct Greenhouse Soil Continuous Cropping Obstacles" (CN102498777A) discloses that the anaerobic reduction in fresh biogas slurry can be used to treat the soil with continuous cropping obstacles by flooding the greenhouse continuous cropping planting area. However, since it can only digest part of the fresh biogas slurry in summer high temperature weather, it cannot use the biogas slurry produced in other periods, so for large and medium-sized biogas projects that produce a large amount of biogas slurry all year round, the digestion capacity Obviously insufficient; in addition, in the process of storage, extraction, transportation, and irrigation, biogas slurry loses or reduces its anaerobic reducibility due to contact with oxygen, which greatly reduces its disinfection effect; thirdly, in terms of the amount of flood irrigation, In order to obtain a good disinfection effect by flood irrigation as much as possible, the fertilization effect of the biogas slurry cannot be controlled, and it is easy to cause fertilizer damage due to excessive fertilization

In fact, the concentration of available nitrogen fertilizer in the biogas slurry that has not undergone solid-liquid separation is generally between 0.03% and 0.2%. 3 For biogas slurry, the total nitrogen mass concentration is calculated at 0.12%, and the available nitrogen fertilizer applied per mu is 60kg, which is far greater than the amo

Images