Preparation method of humic acid suspended liquid fertilizer

Abstract

The invention discloses a preparation method of a humic acid suspended liquid fertilizer and belongs to the technical field of fertilizer preparation. The preparation method disclosed by the inventionhas the benefits that mixed suspended sludge liquid of sweet potato starch wastewater and secondary sedimentation activated sludge is used as a raw material and is changed from wastes into valuablesthrough pyrolysis; in addition, sodium humate in the humic acid fertilizer and a mixed carboxylic acid monomer in a liquefaction dispersant are subjected to graft copolymerization reaction, the non-polar end is combined with the hydrophobic surfaces of humic acid solid particles, and a polar carboxylic group is outward, so that the liquefaction dispersant is prevented from producing the hard precipitation in the liquid fertilizer; in the invention, glycine is added as a nitrogen element carrier, so that nitrogen requirements can be provided for crops; carboxyl groups in amino acids have chelating abilities and can also play a role in regulating the growth of the crops; side reaction can be generated between acrylic acids in the liquefaction dispersant in the liquid fertilizer and maleic anhydride to form acrylate, so that the liquid fertilizer is semi-oily and is more easily adhered onto the leaf surfaces of the crops, the transpiration is effectively inhibited, and the absorption efficiency of nutrient elements by the crops is improved, therefore, the application prospect is wide.

Description

technical field [0001] The invention discloses a preparation method of a humic acid suspension type liquid fertilizer, which belongs to the technical field of fertilizer preparation. Background technique [0002] Liquid fertilizer, also known as fluid fertilizer, commonly known as liquid fertilizer, is a liquid product of one or more nutrients required by crops, generally with the theme of N, P, K or one of the three major nutrients. Many micronutrients are also often included. [0003] Liquid fertilizers have been developed for 200 years. There are many varieties, which can be roughly divided into two categories: liquid nitrogen fertilizer and liquid compound fertilizer. Liquid nitrogen fertilizers include nitrogen in ammonium, nitrate and amide states, such as liquid ammonia, ammonia water, ammonia compounds of ammonium nitrate and ammonia, ammonia compounds of urea and ammonia, etc. Liquid compound fertilizers contain two or three nutrients of N, P, and K, such as ammo...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the content of active ingredients such as nitrogen, phosphorus, and potassium in the existing humic acid-containing liquid fertilizers is generally low, and precipitation is easy to affect crop absorption, and the existing suspension-type liquid fertilizers are stable. Poor, the suspension fertilizer has poor adhesion to the crop leaf surface, and is easily washed away by rain. A method for preparing a humic acid-based suspension liquid fertilizer is provided.

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