Preparation method of composite organic high-water-holding-capacity culture medium material

Abstract

The invention discloses a preparation method of a composite organic high-water-holding-capacity culture substrate material, and relates to the technical field of plant culture substrates, and the composite organic high-water-holding-capacity culture substrate material comprises the following raw materials: polyvinyl alcohol, wood flour, a foaming agent, a cross-linking agent and water. The slow release fertilizer contains a large amount of organic matters, can realize slow release of nutrients in a matrix and promote growth and development of plants, has water holding capacity which is about 2-3 times of the weight of the slow release fertilizer, can realize slow release of organic matter nutrients, and is environment-friendly, pollution-free to the environment, low in cost, simple in process and easy for industrial large-scale production.

Description

technical field

[0001] The invention relates to the technical field of plant cultivation substrates, in particular to a method for preparing a composite organic high water-holding cultivation substrate material. Background technique

[0002] In the modern soilless cultivation industry, matrix cultivation technology is widely used in seedling breeding, greenhouse planting and landscaping because of its high efficiency, convenience and high survival rate. There are mainly two forms of existing substrate culture, one is to use plastic trays to dress bulk substrates as seedling containers for seedling cultivation, and the other is to use rock wool for seedling cultivation. However, these seedling containers generally have problems such as poor water permeability and air permeability, plant roots cannot penetrate the container wall and affect normal growth, difficult nutrient supply in the later stage, and cannot be degraded, and damage to the seedling root system and seedling cu...

Examples

Embodiment 1

[0025] Step 1: The selected polyvinyl alcohol model is PVA-1799, the degree of polymerization is 1700, and the degree of alcoholysis is 99%;

[0026] Wood flour is composted from miscellaneous wood or landscaping waste, crushed and passed through a 200-mesh sieve;

[0027] Foaming agent is sodium lauryl sulfate;

[0028] The cross-linking agent is borax, and the main component is sodium tetraborate.

[0029] Get wood powder 12g, water 55ml, make wood powder aqueous solution;

[0030] Get whipping agent 0.08g, water 5ml, make foaming agent aqueous solution;

[0031] Take 0.67 g of the crosslinking agent and 5 ml of water to prepare an aqueous solution of the crosslinking agent.

[0032] Step 2: Take 4g of polyvinyl alcohol and 23ml of water to mix polyvinyl alcohol and water. Heating in a water bath at 90-100°C and stirring at a speed of 100r / min for 0.5h to obtain an aqueous solution of polyvinyl alcohol;

[0033] Step 3: Lower the polyvinyl alcohol aqueous solution to a ...

Embodiment 2

[0036] Step 1: Select the required polyvinyl alcohol, wood flour, foaming agent, crosslinking agent, and water.

[0037] Get wood powder 8g, water 35ml, make wood powder aqueous solution;

[0038] Get whipping agent 0.08g, water 5ml, make foaming agent aqueous solution;

[0039] Take 0.67 g of the crosslinking agent and 5 ml of water to prepare an aqueous solution of the crosslinking agent.

[0040] Step 2: Take 8g of polyvinyl alcohol and 45ml of water to mix polyvinyl alcohol and water. Heating in a water bath at 90-100°C and stirring at a speed of 100r / min for 0.5h to obtain an aqueous solution of polyvinyl alcohol.

[0041] Step 3: Lower the polyvinyl alcohol aqueous solution to a temperature of 60° C., add wood flour aqueous solution and foaming agent aqueous solution, and stir evenly.

[0042] Step 4: Add the cross-linking agent aqueous solution dropwise to the above mixed solution, stir at 1700-1800r / min for 3 minutes, the solution foams to 2.5 times the original vol...

technical field

[0001] The invention relates to the technical field of plant cultivation substrates, in particular to a method for preparing a composite organic high water-holding cultivation substrate material. Background technique

[0002] In the modern soilless cultivation industry, matrix cultivation technology is widely used in seedling breeding, greenhouse planting and landscaping because of its high efficiency, convenience and high survival rate. There are mainly two forms of existing substrate culture, one is to use plastic trays to dress bulk substrates as seedling containers for seedling cultivation, and the other is to use rock wool for seedling cultivation. However, these seedling containers generally have problems such as poor water permeability and air permeability, plant roots cannot penetrate the container wall and affect normal growth, difficult nutrient supply in the later stage, and cannot be degraded, and damage to the seedling root system and seedling cu...

Examples

Embodiment 1

[0025] Step 1: The selected polyvinyl alcohol model is PVA-1799, the degree of polymerization is 1700, and the degree of alcoholysis is 99%;

[0026] Wood flour is composted from miscellaneous wood or landscaping waste, crushed and passed through a 200-mesh sieve;

[0027] Foaming agent is sodium lauryl sulfate;

[0028] The cross-linking agent is borax, and the main component is sodium tetraborate.

[0029] Get wood powder 12g, water 55ml, make wood powder aqueous solution;

[0030] Get whipping agent 0.08g, water 5ml, make foaming agent aqueous solution;

[0031] Take 0.67 g of the crosslinking agent and 5 ml of water to prepare an aqueous solution of the crosslinking agent.

[0032] Step 2: Take 4g of polyvinyl alcohol and 23ml of water to mix polyvinyl alcohol and water. Heating in a water bath at 90-100°C and stirring at a speed of 100r / min for 0.5h to obtain an aqueous solution of polyvinyl alcohol;

[0033] Step 3: Lower the polyvinyl alcohol aqueous solution to a ...

Embodiment 2

[0036] Step 1: Select the required polyvinyl alcohol, wood flour, foaming agent, crosslinking agent, and water.

[0037] Get wood powder 8g, water 35ml, make wood powder aqueous solution;

[0038] Get whipping agent 0.08g, water 5ml, make foaming agent aqueous solution;

[0039] Take 0.67 g of the crosslinking agent and 5 ml of water to prepare an aqueous solution of the crosslinking agent.

[0040] Step 2: Take 8g of polyvinyl alcohol and 45ml of water to mix polyvinyl alcohol and water. Heating in a water bath at 90-100°C and stirring at a speed of 100r / min for 0.5h to obtain an aqueous solution of polyvinyl alcohol.

[0041] Step 3: Lower the polyvinyl alcohol aqueous solution to a temperature of 60° C., add wood flour aqueous solution and foaming agent aqueous solution, and stir evenly.

[0042] Step 4: Add the cross-linking agent aqueous solution dropwise to the above mixed solution, stir at 1700-1800r / min for 3 minutes, the solution foams to 2.5 times the original vol...