In recent days, farmers have called in anxiously and said that he had planted 2 mu of shed vegetables because they had applied a few cars of fresh pig manure. To be sure, this is a misfortune with overdosing of fresh pig manure without any treatment. In the busy farming season, some farmers did not prepare organic fertilizers in advance, and some of the crops they planted, such as vegetables, fruit trees, and other economic crops, were inseparable from organic fertilizers. They directly went to the farms to purchase fresh manure. It often happens in production. It has the following disadvantages:
Infectious diseases and insects contain coliforms, nematodes, and other pathogens and pests. The direct use of diseases and pests, the spread of diseases, and the incidence of crops will also have an impact on the health of people who eat agricultural products. When unfermented organic matter is fermented in the soil, it is easy to grow pathogens. With pests, it causes the occurrence of plant diseases and pests.
Fermentation of unfermented raw manure in the fermented soil, when the fermentation conditions are met, fermentation of the raw manure under the action of microorganisms; when the fermentation site is closer to the root or the crop plants are smaller, the heat generated by the fermentation will affect the crop Growth, when severe, can lead to plant death.
The toxic gas hazards produce methane, ammonia and other harmful gases during the decomposition process, causing acid damage and root damage to the soil and crops.
Soil oxygen-deficient organic matter consumes oxygen from the soil during the decomposition process, temporarily leaving the soil in an anoxic state. Under this condition of hypoxia, crop growth is inhibited.
Slow fertilizer effects Nutrients in unfermented and decomposed organic fertilizers are mostly organic or slow-acting. They cannot be directly absorbed and utilized by crops. They can only be digested and converted into a quick-effect state before they can be used by crops. Therefore, direct application without fermentation will slow down the effect of the fertilizer.
In general, this kind of poisoning poisoning is too long, the harm is too heavy, and the plants are seriously wilting dead seedlings. There is no way to solve this problem. Only after the natural fermentation of raw manure in the soil, can it be changed again. If the hazard is light and it is discovered in time, it can be immediately taken out of the excrement and urine water, and then flushed with clean water two or three times to reduce the residual fecal urine water in the field soil, dilute the concentration, eliminate some of the toxic gas has been generated, can reduce the hazard.
Special attention should be paid to the fact that drinking urine and water is strictly forbidden! Must be cooked before application, and the concentration of the application should not be too high, livestock manure after fermentation, it is best mixed with fertilizer. Dry soil fertilization should be about 10 centimeters away from the roots of the crop, and deep cover should be applied to prevent burning of seedlings. Soil dry topdressing should be properly irrigated, reducing the concentration to avoid burning seedlings to reduce production.