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Preparation method of water-retention and easy-to-wet cultivation substrate

A technology for cultivation substrates and preparation steps, which is applied in the field of preparation of water-holding and easy-wet cultivation substrates, can solve problems such as poor rewetability, water loss, and easy formation of hard lumps, and achieve improved water holding capacity, improved water holding performance, and enhanced affinity. and adsorptive effect

Inactive Publication Date: 2018-11-02
吴伟华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is that the current common cultivation substrates have poor water holding capacity. When watering, most of the water will be lost with the large pores of the substrate and the four walls of the container. It takes a lot of labor to fully stir the substrate to gradually moisten it. The disadvantages of hard lumps and poor rewetability after dehydration and drying of the substrate provide a method for preparing a water-holding and easy-to-wet cultivation substrate

Method used

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  • Preparation method of water-retention and easy-to-wet cultivation substrate

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Take the coconut shell and wash it and put it into the steam explosion tank of the steam explosion device, and feed steam preheated to 200°C into the steam explosion tank until the pressure in the steam explosion tank reaches 2.0MPa. After maintaining the pressure for 30s, turn on the steam explosion tank Explosion tank discharge valve, so that the material in the steam explosion tank is instantly sprayed into the receiving tank, and the material in the receiving tank is collected to obtain steam-exploded coconut shells; the steam-exploded coconut shell fragments are immediately frozen with liquid nitrogen for 1 minute, and put away after freezing. Put into oven and dry 20min at 105 DEG C to obtain pretreated coconut shell fragments, mix the pretreated coconut shell fragments with water and sodium hydroxide in a mass ratio of 1:10:1 and then pack into a high-pressure cooker, Pressure is 1.5MPa, and temperature is high-pressure cooking 5h under the condition of 150 ℃; Aft...

example 2

[0024]Take the coconut shell and wash it and put it into the steam explosion tank of the steam explosion device, and feed steam preheated to 210°C into the steam explosion tank until the pressure in the steam explosion tank reaches 2.1MPa. After keeping the pressure for 40s, open the steam explosion tank. Explosion tank discharge valve, so that the material in the steam explosion tank is instantly sprayed into the receiving tank, and the material in the receiving tank is collected to obtain steam-exploded coconut shells; the steam-exploded coconut shell fragments are immediately frozen with liquid nitrogen for 2 minutes, and put away after freezing. Put into oven and dry at 108 ℃ for 25min to obtain the pretreated coconut shell fragments, mix the pretreated coconut shell fragments with water and sodium hydroxide in a mass ratio of 1:10:1 and put them into a high-pressure cooker, Pressure is 1.6MPa, and temperature is high-pressure cooking 7h under the condition of 160 ℃; After ...

example 3

[0026] Take the coconut shell and wash it and put it into the steam explosion tank of the steam explosion device, and feed steam preheated to 220°C into the steam explosion tank until the pressure in the steam explosion tank reaches 2.2MPa. After keeping the pressure for 50s, open the steam explosion tank. Explosion tank discharge valve, so that the material in the steam explosion tank is instantly sprayed into the receiving tank, and the material in the receiving tank is collected to obtain steam-exploded coconut shells; the steam-exploded coconut shell fragments are immediately frozen with liquid nitrogen for 2 minutes, and put away after freezing. Put into the oven and dry at 110°C for 30min to obtain the pretreated coconut shell fragments, mix the pretreated coconut shell fragments with water and sodium hydroxide in a mass ratio of 1:10:1, and then pack them into a high-pressure cooker. Pressure is 1.8MPa, and temperature is high-pressure cooking 8h under the condition of 1...

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Abstract

The invention relates to a preparation method of a water-retention and easy-to-wet cultivation substrate, and belongs to the technical field of soilless cultivation. The method comprises the steps that fiber-enriched porous coconut shells serve as a raw material and are subjected to steam explosion, liquid nitrogen freezing and alkali boiling at high temperature and high pressure to make partial cellulose degraded into glucose, then the coconut shells are subjected to an oxidation reaction by using dilute nitric acid, and aldehyde groups and hydroxymethyl groups in glucose are oxidized to carboxyl groups. By means of the preparation method, the number of hydrophilic carboxyl groups in the coconut shell material is increased; through the increase of the hydrophilic carboxyl groups, the affine adsorbability of the coconut shell substrate to water molecules is improved, and the water-retention property of the coconut shell substrate is remarkably improved; biomass rich in amino acid alsoserves as a raw material, mixed pulverized materials are subjected to sealed fermentation by using mold microorganisms, free carboxyl groups and amino groups are introduced to the surfaces of the modified coconut shells through the self-crosslinking function of the microorganisms, through the hydrophilic groups, the surface hydrophilic property of the cultivation substrate can be significantly improved, the rewetting property is improved, and the cultivation substrate has broad application prospects.

Description

technical field [0001] The invention relates to a preparation method of a water-holding and easy-wetting cultivation substrate, which belongs to the technical field of soilless cultivation. Background technique [0002] Substrate cultivation is a soilless cultivation method that fixes plant roots with a solid substrate and absorbs nutrient solution and oxygen through the substrate. Substrate cultivation not only effectively solves the contradiction between protected agriculture and open field agricultural production, but also reduces the occurrence of soil-borne diseases, realizes high absorption of water and fertilizer by vegetables, and shortens the growth cycle of protected vegetables. Nowadays, plant biotechnology has developed into an important part of the new technology revolution, and the application of biotechnology in various production fields has received huge economic benefits. Among them, the rapid propagation of seedlings by tissue culture is the most widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/25A01G24/22A01G24/20
CPCA01G24/20A01G24/22A01G24/25
Inventor 吴伟华张晶
Owner 吴伟华