Right now, it is the critical moment for planting the corn field. How to apply base fertilizer, compound fertilizer and bio-fertilizer use are knowledge that farmers' friends should know. From the point of view of fertilizer usage, the specific amount of various fertilizers used as base fertilizer can be determined with reference to the comprehensive factors such as the local field fertilizer effect test results and the target yield for many years. Generally, about 30% of the total amount of nitrogen fertilizer on high fertility soils is used as a base, medium and low. Fertility soil has 50%-70% of nitrogen fertilizer as the base fertilizer, while phosphorus, potassium fertilizer and microelement fertilizer are all applied as much as possible at one time.
From the perspective of fertilizer varieties, ammonium bicarbonate, ammonium phosphate, phosphate, diammonium, calcium magnesium phosphate fertilizer, potassium phosphate, potassium sulfate, potassium sulfate, grass ash, zinc fertilizer in fertilizer, manganese fertilizer, etc. Both are suitable as base fertilizers.
In terms of depth, the base fertilizer should generally be applied to the entire plough layer, ie a depth of 15-20 cm. For organic fertilizers, nitrogen fertilizers, potash fertilizers, and trace fertilizers, they can be mixed evenly on the surface of the ground and then ploughed into the soil so that the fertilizer is evenly mixed with the entire plough layer of soil. Because of poor mobility, phosphate fertilizers should be applied in two layers: the lower layer should be applied to a depth of 15-20 cm, and the upper layer should be applied to a depth of about 5 cm. The application methods of compound fertilizers mainly include the following types: base fertilizer application. Before planting, when the soil is set, spread it to the surface and turn it over to the bottom of the plough. Generally, it is best to use 10-20 cm below the plough.
For fertilizer application. Must pay attention to species, fat isolation 8-10 cm as well.
Make flushes. In the later stage of crop growth, the fertilizer is combined and watered after the fertilizer is dissolved. For foliar fertilizer. After dissolving 0.5% of Luxi potassium sulfate compound fertilizer, the supernatant was sprayed on the front and back of the leaf after 4 pm, and it could be absorbed in 24 hours, and sprayed once every 5-7 days.
The role of microbial fertilizers: Through the life activities of these beneficial microorganisms, the molecular nitrogen that cannot be used in the fixed transforming air is combined nitrogen, and the combined phosphorus and potassium that cannot be utilized in the soil are available phosphorus and potassium. Analyze more than 10 kinds of medium and trace elements in the soil. Through the beneficial propagation of microorganisms in the rhizosphere, a large number of polysaccharides are produced. This is combined with mucilage and mineral colloids and organic colloids secreted by plants to form a soil aggregate structure and improve soil fertility and water retention. ability. Good quality microbial fertilizer can promote the growth of crops, improve soil structure, improve the quality of crop products and improve crop disease prevention and disease resistance, so as to increase production and income.
Microbiological fertilizers should be promoted for promotion: Microbiological fertilizers that do not have a national registration certificate cannot be promoted; microbiological fertilizers whose effective viable counts do not meet the standard should not be used; microbiological fertilizers whose storage time exceeds the valid period should not be used; and storage conditions and methods of use must be strictly adhered to. Regulation Office.
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