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Fertilizer slow-release material with soil improving function as well as preparation method and application thereof

A fertilizer slow-release and soil improvement technology, which is applied in the fields of application, ammonium salt fertilizer, fertilizer mixture, etc., can solve the problem of low added value of natural silicate minerals, weak nutrient adsorption and exchange capacity of fertilizers, poor slow-release effect of fertilizers, etc. problems, to achieve excellent water and fertilizer retention effects, improve soil water retention energy, and promote the formation of soil aggregates

Inactive Publication Date: 2020-01-31
安徽卓砺农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the amount of natural silicate minerals used as soil improvement additives is huge, and the amount per mu is above the ton level (ranging from 500kg to 3000kg), and the cost of use is relatively high.
On the other hand, the internal pores of natural silicate minerals are mostly filled and blocked by impurities, and the degree of interconnection is poor. The adsorption and exchange capacity of fertilizer nutrients is weak, and silicate minerals have a selective adsorption effect on positively charged ammonium ions, but It does not have a good adsorption and retention effect on negatively charged nitrates that are easy to lose. Therefore, the slow-release effect of fertilizers used for natural silicate minerals is not good
These factors make the added value of natural silicate minerals as fertilizer additives low, limiting their application in the field of fertilizers

Method used

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  • Fertilizer slow-release material with soil improving function as well as preparation method and application thereof
  • Fertilizer slow-release material with soil improving function as well as preparation method and application thereof
  • Fertilizer slow-release material with soil improving function as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The fertilizer slow-release material with the function of improving soil, the preparation method is as follows:

[0043] S1. Mix montmorillonite, zeolite, attapulgite and sepiolite in a mass ratio of 5:60:30:5 to obtain natural silicate mineral material, crush to 100 mesh and dry to make the water content below 2% , and then calcined at 480°C for 1.5h to obtain natural silicate mineral materials that have been crushed, dried and calcined;

[0044] S2. Dissolve 0.25 parts by weight of anionic polyacrylamide and 0.1 parts by weight of potassium polyacrylate in 10 parts by weight of water to obtain a polymer modified layer solution, and uniformly spray the polymer modified layer solution on 100 parts by weight of the process Crushing, drying and calcining the surface of the natural silicate mineral material, and then treating it at 125°C for 1 hour, carrying out surface organic modification, drying, and crushing to 100 meshes.

[0045] Among them, the degree of hydrolysis...

Embodiment 2

[0047] The fertilizer slow-release material with the function of improving soil, the preparation method is as follows:

[0048] S1. Mix zeolite and attapulgite at a mass ratio of 70:30 to obtain a natural silicate mineral material, crush it to 200 mesh and dry it so that the water content is below 2%, and then roast it at 550°C for 1.5h to obtain a Crushed, dried and calcined natural silicate mineral materials;

[0049] S2. Dissolve 0.2 parts by weight of anionic polyacrylamide and 0.15 parts by weight of potassium polyacrylate in 10 parts by weight of water to obtain a polymer modified layer solution, and uniformly spray the polymer modified layer solution on 100 parts by weight of the process The surface of the natural silicate mineral material treated by crushing, drying, and roasting is treated at 120°C for 1.5 hours, dried, and crushed to 200 meshes.

[0050] Wherein, the degree of hydrolysis of the anionic polyacrylamide is 95%, and the molecular weight is 22 million. P...

Embodiment 3

[0052] The fertilizer slow-release material with the function of improving soil, the preparation method is as follows:

[0053] S1. Mix montmorillonite, attapulgite, sepiolite, and zeolite in a mass ratio of 30:3:60:7 to obtain a natural silicate mineral material, crush it to 100 mesh and dry it so that the water content is less than 2% , and then calcined at 500°C for 1.5 hours to obtain natural silicate mineral materials that have been crushed, dried and calcined;

[0054] S2. Dissolve 0.3 parts by weight of anionic polyacrylamide and 0.2 parts by weight of potassium polyacrylate in 10 parts by weight of water to obtain a polymer modified layer solution, and uniformly spray the polymer modified layer solution on 100 parts by weight of the process Crushing, drying, and calcining the surface of natural silicate mineral materials, then treating at 130°C for 2 hours, drying, and crushing to 100 meshes.

[0055] Among them, the degree of hydrolysis of anionic polyacrylamide is 8...

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Abstract

The invention discloses a fertilizer slow-release material with a soil improving function as well as a preparation method and application thereof. The fertilizer slow-release material with the soil improving function comprises a natural silicate mineral material and a polymer modified layer coating the surface of the natural silicate mineral material, and the polymer modified layer comprises the components of polyacrylamide and polyacrylate. The specific preparation method comprises the following steps: dissolving polyacrylamide and polyacrylate in water to obtain a polymer modified layer solution, uniformly spraying the polymer modified layer solution on the surface of a natural silicate mineral material subjected to crushing, drying and roasting treatment, and treating at 120-130 DEG C for 1-2 hours, thereby obtaining the product. The fertilizer slow-release material disclosed by the invention has the effects of water and fertilizer retention, heat preservation and ventilation, nitrogen loss control and long-acting slow release, and is simple in process, good in economy, environment-friendly and free of environmental pollution.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a slow-release fertilizer material with the function of improving soil and its preparation method and application. Background technique [0002] Fertilizer is one of the most important means of production in agricultural production and the material basis for sustainable agricultural development. However, the release rate of fertilizer nutrients is too fast, and the crops lose it before they can absorb it. After the fertilizer is applied to the soil, a series of chemical transformations will occur, and there is also a considerable degree of nutrient loss in the process. As a result, the utilization rate of fertilizers in my country is low. The utilization rate of nitrogen fertilizers in foreign countries is 50% to 55%, while that in China is only 30% to 35%. The waste of resources is serious; at the same time, serious water pollution is caused due to the loss of fertilizers (t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/80C05G5/30
CPCC05C3/00
Inventor 邰俊强
Owner 安徽卓砺农业科技有限公司
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