阅读说明：本技术 一种叶面肥的制备方法 (Preparation method of foliar fertilizer ) 是由 桂宝友 于 2020-03-28 设计创作，主要内容包括：本发明公开了一种叶面肥的制备方法。本发明选用风化煤和食用碱通过冷浸法提取黑腐植酸,提取物除了含有黑腐植酸外,还包含丰富的氮磷钾等微量元素。尿素可以综合提高肥力,硫酸亚铁可以为植物补充铁元素,同时由于硫酸亚铁为弱酸性,可以调节植物内部的酸碱平衡,尤其对于盐碱地上的植物起到较好效果。本发明公开的叶面肥制作方法步骤简便、升本低、产量高,便于进行大规模市场化生产,可广泛应用在化肥技术领域。(The invention discloses a preparation method of a foliar fertilizer. The invention selects weathered coal and edible alkali to extract black humic acid by a cold leaching method, and the extract contains rich nitrogen, phosphorus, potassium and other trace elements besides the black humic acid. The urea can comprehensively improve the fertility, the ferrous sulfate can supplement iron elements for plants, and meanwhile, the ferrous sulfate is weakly acidic, so that the acid-base balance in the plants can be adjusted, and particularly, the urea has a good effect on the plants on the saline-alkali soil. The leaf fertilizer preparation method disclosed by the invention has the advantages of simple steps, low cost rise, high yield, convenience for large-scale market production and wide application in the technical field of chemical fertilizers.)

1. The preparation method of the foliar fertilizer is characterized by comprising the following steps:

s1, dissolving weathered coal in water, adding edible alkali, stirring, standing for precipitation, and taking a liquid phase to obtain a humic acid black suspension;

s2, heating the black humic acid suspension obtained in the step S1 to 60-80 ℃, adding urea, and stirring until the urea is completely dissolved to obtain a mixed solution of the black humic acid and the urea;

s3, cooling the mixed solution of the black humic acid and the urea obtained in the step S2 to normal temperature, adding ferrous sulfate, uniformly stirring and bottling;

the weight portion of the weathered coal and the water in S1 is 10:7-9, the weight portion of the black humic acid suspension and the urea in S2 is 1:0.8-1, and the adding amount of the ferrous sulfate in S3 is 0.02-0.04 per mill of the total solution weight.

2. The preparation method of the foliar fertilizer as claimed in claim 1, wherein the particle size of the weathered coal is less than 2 mm.

3. The preparation method of the foliar fertilizer as claimed in claim 1, wherein the time of the standing precipitation in the S1 is 3 to 5 days.

4. The preparation method of the foliar fertilizer as claimed in claim 1, wherein the ferrous sulfate is added in the step of S3 by preparing the ferrous sulfate into a ferrous sulfate solution with a mass fraction of 30-50%, and then uniformly stirring the ferrous sulfate solution and the mixed solution of the humic acid black and the urea obtained in the step of S2.

Technical Field

The invention relates to the field of fertilizer preparation, in particular to a preparation method of a foliar fertilizer.

Background

The foliar fertilizer is a fertilizer which aims at being absorbed by the leaf surface and directly applies nutrients required by plants to the leaf surface. The application of foliar fertilisers is a form of supplementation to the plants to absorb nutrients. When the plant is in the later growth stage, the activity of the root system is reduced, the fertilizer absorption capacity is insufficient, or the soil is saline-alkali soil, and the plant cannot absorb the nutrients from the root system well, the foliar fertilizer is an important source for the plant to absorb the nutrients; the fertilizer absorbed by the leaf surface can rapidly enter the plant body, the fertilizing speed is high, and the effect is good; the foliar fertilizer can also reduce the pollution of the fertilizer to the soil.

Disclosure of Invention

The invention aims to provide a preparation method of a foliar fertilizer, which comprises the following steps:

s1, dissolving weathered coal in water, adding edible alkali, stirring, standing for precipitation, and taking a liquid phase to obtain a humic acid black suspension;

s2, heating the black humic acid suspension obtained in the step S1 to 60-80 ℃, adding urea, and stirring until the urea is completely dissolved to obtain a mixed solution of the black humic acid and the urea;

s3, cooling the mixed solution of the black humic acid and the urea obtained in the step S2 to normal temperature, adding ferrous sulfate, uniformly stirring and bottling;

the weight portion of the weathered coal and the water in S1 is 10:7-9, the weight portion of the black humic acid suspension and the urea in S2 is 1:0.8-1, and the adding amount of the ferrous sulfate in S3 is 0.02-0.04 per mill of the total solution weight.

As an improvement, the particle size of the weathered coal is less than 2 mm.

As an improvement, the standing and precipitating time in S1 is 3-5 days.

As an improvement, the method for adding the ferrous sulfate in S3 is to prepare the ferrous sulfate into a ferrous sulfate solution with the mass fraction of 30-50%, and then uniformly stir the ferrous sulfate solution and the mixed solution of the black humic acid and the urea obtained in S2.

The invention has the beneficial effects that:

the invention selects weathered coal and edible alkali to extract black humic acid by a cold soaking method, and the extract contains rich nitrogen, phosphorus, potassium and other microelements and organic matters beneficial to plant growth besides the black humic acid. The urea can comprehensively improve the fertility, the ferrous sulfate can supplement iron elements for plants, and meanwhile, the ferrous sulfate is weakly acidic, so that the acid-base balance in the plants can be adjusted, and particularly, the urea has a good effect on the plants on the saline-alkali soil. The leaf fertilizer preparation method disclosed by the invention has the advantages of simple steps, low cost increase, high yield and convenience for large-scale market production.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.