Soilless culture substrate and preparation method thereof

A soilless culture substrate and substrate technology, applied in planting substrates, botanical equipment and methods, culture medium, etc., can solve the problems of inability to meet the nutritional needs of different crops, poor water retention, complicated operations, etc., and achieve the goal of promoting healthy plant growth , Good mechanical strength, simple operation effect

Active Publication Date: 2019-09-17
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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  • Soilless culture substrate and preparation method thereof

Examples

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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 culture 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 of 50...

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Abstract

The invention discloses a soilless culture substrate and a preparation method thereof. The substrate is a porous swelling material into which commercial fertilizer is embedded, and the porous swelling material is lignin hydrogel which is synthesized in situ among porous structures of wood chip particles and has a water absorption swelling property. A large amount of fertilizer is loaded into a network structure formed by wood chips and the hydrogel. Through the adsorption performance of the wood chips, not only is the capability of the single hydrogel to load the fertilizer improved, but also leaching of the fertilizer and hydrogel which are adsorbed in hole cell cavities of the wood chips during a reaction is avoided. The substrate has not only the dual functions of water retention and slow fertilizer release but also high mechanical strength, the fertilizer utilization rate is increased, and the plant growth can be effectively promoted. The soilless culture substrate adopts waste generated by wood processing and the papermaking by-product lignosulfonate as non-toxic raw materials and has the advantages of being degradable, safe, environmentally friendly, low in cost, simple in operation, convenient to use and the like, and large-scale application and popularization are easy.

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 Applications(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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