Diatomite-based silicon fertilizer and preparation method thereof

A diatomite and silicon-based technology, applied in liquid fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of difficult popularization and application, difficult preparation process, complicated preparation steps, etc., and achieves diversified application methods, easy crop absorption, Ease of promotion

Active Publication Date: 2017-10-13
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation steps of this method are complicated, and high-priced reagents such as metal chelating agents need to be used, resulting in difficulties in the preparation process, high product costs, and difficulty in popularization and application.

Method used

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  • Diatomite-based silicon fertilizer and preparation method thereof
  • Diatomite-based silicon fertilizer and preparation method thereof

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preparation example Construction

[0014] A preparation method of diatomite-based silicon fertilizer, comprising:

[0015] S100: Prepare raw materials.

[0016] In this embodiment, diatomaceous earth is used as the raw material. The mass percentage of diatom shells of the selected diatomite is greater than 60%.

[0017] Diatomite is a natural aggregate of porous silicon minerals, mainly composed of diatom opal (porous silica) and a very small amount of clay minerals, quartz and other minerals. The amount of diatom-containing opal is generally greater than 65%, and even higher than 90% in some samples. In addition, diatom opal has an amorphous structure with very low crystallinity. Compared with other silicon-containing minerals or solid wastes, it has higher solubility and is easier for crops to absorb. Therefore, diatomaceous earth is a naturally available silicon fertilizer.

[0018] Studies have found that direct application of diatomaceous earth can increase the yield of rice. However, it must be point...

Embodiment 1

[0043] Put 100kg of diatomite (Guangdong Puchang diatomite, diatom opal content is about 75%) in 2000L of 0.1mol / L sodium hydroxide solution to form a suspension, after fully stirring, heat to boiling under normal pressure, keep After 12 hours, solid-liquid separation was carried out after cooling, and the separation liquid was taken. Add 2kg of activated carbon powder to the separation liquid, after fully stirring, use 0.1mol / L hydrochloric acid solution to adjust the pH value to 8, heat to 50°C and fully stir, and then cool to room temperature to obtain sol-like diatomite-based Silicon fertilizer. The obtained diatomite-based silicon fertilizer is evaluated by a transmission electron microscope and a particle size analyzer, and the particle size distribution of a single particle is 10-25 nm.

[0044] Through the actual rice culture comparison, it was found that 20 kg of sol-like diatomite-based silicon fertilizer (effective SiO 2 content of about 14.6 kg), through foliar f...

Embodiment 2

[0046] Put 100kg of diatomite (Guangdong Buchang diatomite, diatom opal content about 75%) in 1000L of 1mol / L sodium hydroxide solution to form a suspension. hours, solid-liquid separation was carried out after cooling, and the separation liquid was taken. Add 1 kg of activated carbon powder to the separation liquid, after fully stirring, use 0.1mol / L sulfuric acid solution to adjust the pH value to 10, heat to 60°C and fully stir, and then cool to room temperature to obtain a sol-like diatomite-based Silicon fertilizer. The obtained diatomite-based silicon fertilizer is evaluated by a transmission electron microscope and a particle size analyzer, and the particle size distribution of a single particle is 8-22 nm.

[0047] Through the actual rice culture control, it was found that 20 kg of high-efficiency soluble silicon fertilizer (effective SiO 2 content of about 15.5 kg), through foliar fertilization can make 1000m 2 18.2% increase in rice yield (while direct application...

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Abstract

The invention relates to the field of a fertilizer and provides a preparation method of a diatomite-based silicon fertilizer. The preparation method of the diatomite-based silicon fertilizer comprises the following steps: putting diatomite into an alkaline solution to form turbid liquid, performing heating and heat preservation on the turbid liquid, cooling, performing solid-liquid separation, and taking separating liquid; and adding an acidic solution into the separating liquid, adjusting the pH value of the separating liquid to be 8 to 10, heating and stirring completely, and then cooling. According to the preparation method, harmful metal can be separated effectively, the aim of reducing the content of the heavy metal in the diatomite is fulfilled, the diatomite-based silicon fertilizer is alkaline, and the acidity of the soil is improved, so that the soil is improved; and the preparation method has the advantages of being simple, low in cost, easy to popularize and the like. In addition, the invention futher provides the diatomite-based silicon fertilizer. The diatomite-based silicon fertilizer is prepared with the preparation method of the diatomite-based silicon fertilizer. The diatomite-based silicon fertilizer has high silicon content, is easy to absorb by crops, can greatly increase the yield of the crops during small-amount application; application modes are diversified, and diatomite-based silicon fertilizer can be used for root fertilization and also can serve as a foliage fertilizer to be applied.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a diatomite-based silicon fertilizer and a preparation method thereof. Background technique [0002] Silicon fertilizer is considered to be the fourth important crop fertilizer after nitrogen fertilizer, potassium fertilizer and phosphorus fertilizer. It can not only promote the root system development of crops, increase crop yield, enhance crop resistance to lodging, pest resistance and drought / cold tolerance; silicon fertilizer is also considered to improve soil (alkaline silicon fertilizer can effectively improve soil acidity), reduce heavy metals in soil The impact of pollution on crops (the effective deposition of heavy metals makes them lose crop effectiveness, or makes it difficult to enter crop fruits) and the advantages of improving crop quality play an important role in the sustainable development of agriculture. [0003] Solid silicon fertilizers have low solubility and are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05D9/00C05G3/80C05G5/20C05G3/00
Inventor 刘冬袁鹏田倩邓亮亮杜培鑫宋雅然何宏平张嵚
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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