First, deepen the technical principles of fertilizer:
(1) Fertilization depth
The deeper application of chemical fertilizers is not as deep as possible, but it must have a proper depth. In this way, we can ensure that we can maximize the use of crops while reducing the volatilization and erosion of fertilizers. Generally, the depth of fertilization is 5-8cm under planting and about 5cm at the seed side, and the topdressing is applied at a depth of 8-12cm below the top soil of the furrows. The deep application of the bottom fertilizer can be combined with site preparation. The depth of fertilization is generally about 20cm.
(2) Fertilization timing
The application of fertilizer in special corn planting shall be based on the local operation (planting) time (season) in addition to the base fertilizer and seed fertilizer. The application of top dressing shall also be carried out according to local agronomic requirements, generally divided into top-dressing and top-dressing fertilizers. Fertilizer and so on, if necessary, but also based on crop growth Shi fertilizer.
(3) Fertilization position
Fertilizer application can not be mixed with the seeds, but also should try to avoid the same bed fertilizer, fertilizer is also not ideal under the seed, fertilizer should be applied as far as possible under the oblique side of the seed, distributed in the vicinity of the crop root is better. It is best to do layered fertilization.
Second, deep fertilization technical measures are:
(1) Deep-diversion fertilization: The bottom-fertilizer is turned to the bottom of the tillage layer while performing deep-turning operations, and the fertilization depth can reach about 20cm.
(2) Deep loosening and fertilization: In the deep loosening operation, random deep fertilization is performed. The base fertilizer has a large depth of deep loosening and is generally 30-40 cm. The depth of fertilization should be controlled and should not exceed 30 cm.
(3) Drilling and fertilizing: In the ridge operation, the base fertilizer is applied to the ridge bottom by using a fertilizing device on a ridge plough, which is generally up to 15-20 cm.
(4) Sowing and fertilizing: Use the fertilizing device on the sowing machine and apply the base fertilizer and mouth fertilizer with the sowing. General fertilizer should be applied 5-15cm below the seed bed, and 3-5cm seed is appropriate. If the machine can meet the deeper fertilizer function, it must be applied in layers, and it must be guaranteed that the seed fertilizer should be 5-15cm and 3-5cm. 5 - There is fertilizer in the 10cm layer.
(5) The topdressing of cultivating top-dressing corn is very useful for promoting the growth and development of the later period and increasing the yield. When topdressing topdressing, the depth of topdressing is about 10cm. The topdressing should be mainly ridge cultivation, and the time should be synchronized with the cultivating work to reach the deep ridge ditch. Shrouded soil, more back to earth.
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