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A kind of soilless culture medium and preparation method thereof

A soilless culture substrate and substrate technology, applied in planting substrates, botany equipment and methods, culture media, etc., can solve problems such as time-consuming, complicated operations, and environmental pollution

Active Publication Date: 2021-07-06
YANGTZE NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a soilless culture substrate, which solves the problems of poor water retention, high cost, and inability to meet the nutritional needs of different crops in the existing substrate.
[0007] The present invention also provides a preparation method of soilless cultivation substrate, which solves the problems of complex operation, long time consumption and environmental pollution in the existing method, and also improves the use of papermaking waste sodium lignosulfonate and wood processing waste value

Method used

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  • A kind of soilless culture medium and preparation method thereof
  • A kind of soilless culture medium and preparation method thereof

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Embodiment 1

[0029] A novel lignin hydrogel-loaded sawdust soilless cultivation substrate is prepared by the following method:

[0030] 1) The waste generated from wood processing is crushed and ground to obtain wood chips with a particle size of 2-3mm.

[0031] 2) Through amination modification treatment, introduce a primary amine highly reactive group into sodium lignosulfonate (SLS) to obtain lignin amine (LA), and improve its reactivity. The specific reaction is shown in formula (1);

[0032]

[0033] The specific steps are: take 10g of sodium lignosulfonate and dissolve it in 100mL of deionized water, add 15g of diethylenetriamine solution with a concentration of 98.5%, and adjust the pH of the above solution with 0.1mol / L hydrochloric acid or sodium hydroxide solution. 10-11, then add 10g of formaldehyde solution with a concentration of 37% dropwise. After the dropwise addition, raise the temperature to 50°C and stir for 4 hours. After the reaction, lower the temperature of the re...

Embodiment 2

[0040] A novel lignin hydrogel-loaded sawdust soilless cultivation substrate is prepared by the following method:

[0041] 1) The waste generated from wood processing is crushed and ground to obtain wood chips with a particle size of 2-3mm.

[0042] 2) Through oxidative modification treatment, the content of hydrophilic high-active groups such as hydroxyl and carboxyl groups is introduced into sodium lignosulfonate, and the specific reaction is as shown in formula (a): the reaction of hydrogen peroxide and lignin side chain carbonyl; ( b): the reaction of hydrogen peroxide with the double bond of the side chain of lignin and (c): the reaction of hydrogen peroxide with the benzene ring of the structural unit of lignin.

[0043]

[0044] The specific steps are: weigh 8g of sodium lignosulfonate and dissolve it in 200mL of sodium hydroxide solution with a concentration of 0.25mol / L, add 6mL of hydrogen peroxide with a concentration of 30%, and stir and react at a temperature o...

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Abstract

The invention discloses a soilless cultivation substrate and a preparation method thereof. The substrate is a porous swelling material embedded with commercial fertilizers, and the porous swelling material is synthesized in situ between the porous structures of sawdust particles and has water absorption and swelling properties. lignin hydrogel. A large amount of fertilizer is loaded in the network structure formed by wood chips-hydrogel, and the adsorption performance of wood chips is used to not only increase the ability of a single hydrogel to load fertilizers, but also to avoid fertilizers adsorbed in the cell cavity of wood chips during the reaction process and hydrogel leaching. The matrix not only has dual functions of water retention and slow release of fertilizers, but also has good mechanical strength, improves the utilization rate of fertilizers, and can effectively promote plant growth. The invention uses the waste produced by wood processing and papermaking by-product lignosulfonate as raw materials, and has the characteristics of non-toxicity, degradability, safety and environmental protection, low cost, simple operation, convenient use and the like, and is easy to be popularized and applied in a large scale.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a soilless culture substrate and a preparation method thereof. Background technique [0002] Soilless cultivation technology is a green and environmentally friendly plant planting method. Compared with traditional soil planting techniques, soilless cultivation has the advantages of wide cultivation conditions, high fertilizer and water utilization efficiency, high-quality crop yield, and easy realization of factory production. It has now become a new way to develop high-efficiency agriculture. Substrate culture has the advantages of good buffer capacity, water saving, strong controllability, and low investment, and has become one of the key research contents of soilless culture technology. An excellent soilless culture substrate needs to have the ability to fix crops, retain water and fertilizer, and ventilate. [0003] In recent years, the soilless cultivation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G24/23A01G24/35A01G24/42
CPCA01G24/23A01G24/35A01G24/42
Inventor 腾晓旭时建伟辛俊娜
Owner YANGTZE NORMAL UNIVERSITY
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