Salt-resistant soil-improving slow release fertilizer and preparation method thereof

A slow-release fertilizer and fertilizer technology, which is applied to fertilizer mixtures, fertilization devices, applications, etc., can solve problems such as affecting the normal growth of crops and the urgency of slow-releasing fertilizers, and achieve the advantages of simple and easy preparation method, significant effect, and reduced raw material cost. Effect

Active Publication Date: 2014-06-25
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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Problems solved by technology

The existence of saline-alkali soil seriously affects the normal growth of crops, and has become a major limiting factor affecting the safe production and...

Method used

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  • Salt-resistant soil-improving slow release fertilizer and preparation method thereof

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Effect test

Embodiment 1

[0045] A salt-resistant slow-release fertilizer for saline-alkali soil improvement. The composition of raw materials in parts by weight is as follows: 10 parts of furfural slag, 30 parts of humic acid, 5 parts of montmorillonite, 5 parts of zeolite powder, 0.2 part of polyvinyl alcohol, and large particle size 10 parts of urea, 24 parts of monoammonium phosphate, and 16 parts of potassium sulfate.

[0046] (1) Take the above-mentioned humic acid, montmorillonite and zeolite powder according to the proportion and put them into a mixer and mix them evenly to obtain a mixture;

[0047] (2) Polyvinyl alcohol is configured into a 0.2-0.5wt% aqueous solution;

[0048](3) Put the nitrogen fertilizer in the drum of the granulator and heat it to 80-85°C, spread the mixture obtained in the step (1) evenly on the surface of the nitrogen fertilizer, then spray the aqueous solution of polyvinyl alcohol obtained in the step (2), and blast Dried until the surface forms a hard shell to obtai...

Embodiment 2

[0052] 15 parts of furfural residue, 25 parts of humic acid, 4 parts of montmorillonite, 6 parts of porous zeolite, 0.3 part of polyvinyl alcohol, 17 parts of large particle urea, 19 parts of monoammonium phosphate, and 14 parts of potassium sulfate. The preparation method is the same as in Example 1 .

[0053] The product of this embodiment is suitable for use as a slow-release fertilizer for moderate saline-alkali soil improvement against salt.

Embodiment 3

[0055] 20 parts of furfural slag, 20 parts of humic acid, 4 parts of montmorillonite, 6 parts of porous zeolite, 0.5 part of polyvinyl alcohol, 19 parts of large particle urea, 15 parts of monoammonium phosphate, and 16 parts of potassium sulfate; the preparation method is the same as in Example 1 .

[0056] The product of this embodiment is suitable for use as a slow-release fertilizer for salt-resistant soil improvement in severe saline-alkali soil.

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Abstract

The invention relates to a salt-resistant soil-improving slow release fertilizer and a preparation method thereof. The salt-resistant soil-improving slow release fertilizer is prepared from the following raw material components: furfural residues, humic acid, montmorillonite, zeolite powder, polyvinyl alcohol, a nitrogen fertilizer, a phosphorus fertilizer and a potassium fertilizer. The method comprises the following steps: mixing humic acid, montmorillonite and zeolite powder, spreading the mixture onto the surface of the nitrogen fertilizer in a revolving drum, spraying a polyvinyl alcohol aqueous solution, and drying to obtain a coated nitrogen fertilizer; mixing the obtained coated nitrogen fertilizer with the furfural residues, the phosphorus fertilizer and the potassium fertilizer to obtain the salt-resistant soil-improving slow release fertilizer. By adopting the salt-resistant soil-improving fertilizer, the fertilizer utilization ratio can be increased, and secondary salt damage of fertilization to soil is reduced; on the other hand, by adopting a coating material, the soil fertility can be improved remarkably, the residual free salt content of saline-alkali soil is adsorbed, and the sustainable production capability is improved; the salt-resistant soil-improving slow release fertilizer is low in cost, and easy to prepare.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a fertilizer capable of reducing salt damage in saline-alkali soil, increasing the content of organic matter in saline-alkali soil and having a slow-release function and a preparation method thereof, belonging to the technical field of agricultural fertilizer manufacturing. Background technique [0002] Due to the comprehensive influence of fertilizer properties and environmental conditions, the low utilization rate of fertilizers has become a common problem in the use of chemical fertilizers in my country, of which nitrogen is 30%-35%, potassium is 30%-35%, and phosphorus is only 10%. -20%, which not only causes a waste of resources, but also has serious adverse effects on the quality of crops and the agricultural environment. Improving fertilizer use efficiency has become a key issue of widespread concern. [0003] A large number of studies have shown that adding substances that slo...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 沈玉文高新昊杨果张玉凤林海涛杨力王江涛范文静
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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