(1) Base fertilizer 1. The annular groove is applied to the edge of the crown projection, and an annular groove with a depth of 30-40 cm is dug. The fertilizer and the topsoil are uniformly mixed and then applied, and then the soil is buried. This method is mostly used for saplings. 2. The radial ditch is centered on the trunk, and is dug 20-40 cm deep, 30 cm wide, 1-2 m long (depending on the size of the crown), and 4-8 radial grooves in the outer deep and shallow, after applying fertilizer. Fill it in. This method is mostly used for adult trees. 3. When the labor or fertilizer is insufficient, the groove-like fertilization can be used to divide the trench line by line or by interlacing, and combined with deep turning for fertilization.
Linyi Fertilizer Network Copyright
(2) Topdressing 1. Ground top dressing determines the fertilization method, location and depth according to the type of fertilizer and the distribution of roots. The nitrogen fertilizer has strong mobility in the soil and should be applied shallowly; the mobility of potassium fertilizer is poor, and the mobility of phosphate fertilizer is even worse. Therefore, phosphorus and potassium fertilizers should be applied to the root distribution layer, and should be applied evenly. It is best to mix with organic fertilizer and then apply it. 2. Types and concentrations of commonly used fertilizers for top dressing: 1 Nitrogen fertilizer. Urea 0.3% - 0.7%; 2 phosphorus fertilizer. Superphosphate and potassium dihydrogen phosphate leaching solution 0.3%-3%, ammonium phosphate 0.1%-0.5%; 3 potassium fertilizer. The ash leaching solution is 3%-10%, 0.5%-1% of potassium chloride, potassium sulfate and potassium phosphate; 4 trace elements. Usually 500 mg / kg. Generally, in the flowering period and the physiological fruit drop period, urea is sprayed once every half month, and phosphorus and potassium fertilizer can be sprayed in the later stage. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
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