Functional fertilizer for orchards in saline-alkali soil and preparation method of fertilizer

The invention provides a functional fertilizer for orchards in saline-alkali soil and a preparation method of the fertilizer, and relates to the field of fruit tree fertilizers. The fertilizer comprises the following components, in parts by weight: 10 to 15 parts of urea, 5 to 10 parts of diammonium phosphate, 8 to 12 parts of potassium sulfate, 4 to 6 parts of zinc sulfate, 3 to 5 parts of ethylenediamine tetraacetate chelated iron, 20 to 30 parts of fish meal, 40 to 50 parts of decomposed chicken manure, 1 to 3 parts of a microbial inoculant, 5 to 15 parts of polyvinyl alcohol microspheres,2 to 4 parts of humic acid, and 80 to 120 parts of modified bentonite. The functional fertilizer prepared by the method is particularly suitable for planting of fruit trees in the orchards in the saline-alkali soil, can not only improve the quality and yield of fruits and economic benefits, but also improve the soil environment, increase the content of organic matter, reduce salts, and effectivelyrealizes water and fertil