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Nitrogen-supplementing embedded growth-promoting agent, and preparation method and application thereof

A growth-promoting agent and embedding agent technology, applied in the field of ecology and environmental protection, can solve the problems of affecting the effect of synergistic restoration of plants and microorganisms, restricting the needs of plant growth and microbial metabolism, imbalance of various nutrient components, etc. Achieve good environmental benefits and safety performance, broad application prospects, and avoid secondary pollution problems

Inactive Publication Date: 2017-05-24
BEIJING FITWELL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the estuary wetlands and beach wetlands have large water bodies with high salinity and harsh conditions for plant growth
The various nutrient components required for the growth of plants and microorganisms contained in these wetland soils are unbalanced, and the application of conventional fertilizers will lose quickly in the wetlands, and the loss is large, which limits the needs of plant growth and microbial metabolism, thus affecting the relationship between plants and microorganisms. The effect of microbial synergistic repair
Although there are traditional slow-release fertilizers and moisturizing technologies in the agricultural field, they are mainly aimed at the cultivation of terrestrial food crops, which are often not suitable for the growth of coastal plants; artificially synthesized polymer materials such as polyethylene, polypropylene, and polyvinyl alcohol are used as coatings. The slow-release fertilizer with buried skeleton has a dense fertilizer particle structure, poor diffusion and mass transfer of nutrient components in the soil, and it is not easy to effectively use during the rapid growth period of plants. Moreover, these matrix skeleton materials are difficult to degrade in the soil in nature, often causing secondary environmental issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The nitrogen-supplemented embedded growth promoting agent is prepared as follows:

[0048] 3L of a suspended aqueous solution containing 1% of sodium alginate, 6% of urea, and 0.28% of antioxidants was prepared into suspension droplets of uniform size in a parallel microchannel reactor at a flow rate of 180cm / min. 2+ Solution (CaCl 2 Frozen crystallization pore formation and cross-linking reaction were carried out in) for 0.5h, and then after appropriate drying, a nitrogen-supplemented embedded growth promoter was obtained.

[0049] The density of the obtained nitrogen-supplemented embedded growth promoter is 1050kg / m 3 , Particle size 2mm, pore diameter 0.5-10μm, porosity 71-85%, nitrogen-containing component mass content 7.2%, antioxidant component mass content is 0.45%, embedding agent skeleton content is 2%, and the balance is water.

[0050] Put the prepared nitrogen-supplementing embedded growth promoting agent into oil-contaminated coastal wetlands for plant and microbia...

Embodiment 2

[0053] The nitrogen-supplemented embedded growth promoting agent is prepared as follows:

[0054] 600ml of a suspended aqueous solution containing 3% of sodium alginate, 15% of urea, and 0.1% of antioxidants was prepared into suspension droplets of uniform size in a parallel microchannel reactor at a flow rate of 50cm / min. 2+ Solution (CaCl 2 In ), freeze crystallization and cross-linking reaction are carried out for 10 hours, and then after appropriate drying, a nitrogen-supplemented embedded growth promoting agent is obtained.

[0055] The density of the prepared nitrogen-supplemented embedded growth promoting agent is 1070kg / m 3 , The particle size is 5mm, the pore size is 0.1-5μm, the porosity is 63-80%, the mass content of nitrogen-containing components is 33%, the mass content of antioxidant components is 0.35%, the embedding agent skeleton content is 6%, and the balance is water.

[0056] Put the prepared nitrogen-supplementing embedded growth promoter into oil-contaminated coa...

Embodiment 3

[0059] The nitrogen-supplemented embedded growth promoting agent is prepared as follows:

[0060] 5L of a suspension aqueous solution containing 2% of sodium alginate, 13% of urea, and 0.5% of antioxidants was prepared into suspension droplets of uniform size in a parallel microchannel reactor at a flow rate of 300cm / min. 2+ Solution (CaCl 2 Frozen crystallization and cross-linking reaction were carried out in) for 5 hours, and then after appropriate drying, a nitrogen-supplemented embedded growth promoter was obtained.

[0061] The density of the prepared nitrogen-supplemented embedded growth promoting agent is 1060kg / m 3 , The particle size is 4mm, the pore size is 0.1-10μm, the porosity is 68-85%, the mass content of nitrogen-containing components is 18%, the mass content of antioxidant components is 0.8%, the embedding agent skeleton content is 3%, and the balance is water.

[0062] Put the prepared nitrogen-supplemented embedded growth promoter into oil-contaminated coastal wetla...

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Abstract

The invention especially relates to a nitrogen-supplementing embedded growth-promoting agent, and a preparation method and application thereof, belonging to the technical field of ecological and environmental protection. The nitrogen-supplementing embedded growth-promoting agent is porous particles and comprises an embedding medium skeleton, and nitrogen-source nutritional components and antioxidation components embedded in the embedding medium skeleton. The nitrogen-supplementing embedded growth-promoting agent has a highly-prosperous pore system and a great pore size; the mass transfer resistance of the nutritional components in pores is small and the nutritional components are utilized by plants and microbes after slow release in a wetland environment; so the loss of the nutritional components is reduced, the utilization rate of the growth-promoting agent is high in the process of plant and microbial restoration, and the growth-promoting agent is applied to cooperative plant and microbial restoration in river mouths or coastal wetland lacking in nitrogen. The preparation method for the nitrogen-supplementing embedded growth-promoting agent provided by the invention is simple and easily practicable; the prepared embedded growth-promoting agent has controllable uniform particle size and excellent performance; industrial scaling-up preparation of the agent can be realized; and the embedded growth-promoting agent has good application prospects in fields like marine ecological engineering and environmental protection.

Description

Technical field [0001] The invention relates to the technical field of ecology and environmental protection, and in particular to a nitrogen-supplemented embedded growth promoting agent and its preparation method and application. Background technique [0002] Estuary wetlands and coastal wetlands are affected by land-based and sea-sourced pollutants, and their water bodies, vegetation, offshore organisms, microorganisms and the entire ecosystem continue to deteriorate. Ecological restoration issues have received widespread attention. Utilizing the joint action of salt-tolerant plants and microorganisms growing in the coastal environment can greatly improve the degradation and restoration effects of plants on wetland pollutants. It is an important development direction of wetland restoration engineering technology in recent years, and it is also effective in solving the pollution of organic matter such as oil in coastal wetlands. way. [0003] However, the estuary wetlands and coas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
CPCY02A20/402
Inventor 苏蔚潇贠军贤田兵高云玲张颂红戴商单李深叶岩磊
Owner BEIJING FITWELL TECH
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