Preparation method of seedling medium block and application of seedling medium block

A seedling-raising substrate and block technology, which is applied in the field of preparation of seedling-raising substrate blocks, can solve problems such as difficult handling, slow root growth, and high consumption of urea-formaldehyde resin foam, and achieve the effects of improving porosity, good adhesion performance, and good foaming performance

Active Publication Date: 2019-01-18
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of matrix is ​​not ideal because the lower layer is plate-shaped, which consumes a lot of urea-formaldehyde resin foam. In addition, the nutrients are located on the upper layer, and the seedlings are rooted on the urea-formaldehyde resin foam board. The nutrients are not easy to reach the roots, and the effect is not ideal; Moreover, the urea-formaldehyde resin foam board is not easy to dispose of after use, and the decomposition speed is still not ideal after being buried in the soil, and it becomes a relatively difficult to dispose of garbage
Moreover, the existing substrates have problems such as slow root growth during seedling cultivation of solanaceous vegetables, difficulty in mechanical non-destructive grasping during transplanting, and old seedlings (big plants) being colonized and falling.

Method used

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  • Preparation method of seedling medium block and application of seedling medium block

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of a seedling-raising matrix square, which comprises the following steps:

[0028] (1) Using 300g of soybean meal and other protein substances as raw materials, add 3000g of a mixed aqueous solution with a final concentration of 0.8mol / L urea and 0.08mol / L potassium hydroxide, stir and react for 1 hour at 130°C, and discharge after cooling. Obtaining hydrolyzed protein with a solid content of 8%;

[0029] (2) Take 7100g formaldehyde solution and 75g polyvinyl alcohol, heat to about 50°C and stir until the polyvinyl alcohol dissolves, add 2500g hydrolyzed protein after dissolution;

[0030] (3) Then use potassium hydroxide to adjust the pH of the solution to 7.7, add 1500g of the first batch of urea, heat to 60°C and then add 1500g of the second batch of urea, continue heating, control the heating rate to 1-2°C / min, to 90 Keep warm for 50min at ℃;

[0031] (4) adjust the pH of the solution with phosphoric acid to be 4.5, carry out the polycondensat...

Embodiment 2

[0037] A preparation method of a seedling-raising matrix square, which comprises the following steps:

[0038] (1) Using 300g of zein and other protein substances as raw materials, add 3000g of a mixed aqueous solution with a final concentration of 1mol / L urea and 0.05mol / L potassium hydroxide, stir and react for 1h at 150°C, and discharge after cooling. Obtaining hydrolyzed protein with a solid content of 10%;

[0039] (2) Take 7500g formaldehyde solution and 75g polyvinyl alcohol, heat to about 50°C and stir until the polyvinyl alcohol dissolves, add 2500g hydrolyzed protein after dissolution;

[0040] (3) Then adjust the pH of the solution to 7.8 with potassium dihydrogen phosphate, add 1500g of the first batch of urea, heat to 60°C and then add 1500g of the second batch of urea, continue heating, control the heating rate to 1°C / min, to 90°C keep warm for 50 minutes;

[0041] (4) adjust the pH of the solution with ammonium chloride to be 4.0, carry out the polycondensatio...

Embodiment 3

[0047] A preparation method of a seedling-raising matrix square, which comprises the following steps:

[0048] (1) Take 300g of protein substances such as by-products of livestock, poultry and fish as raw materials, add 3000g of final concentration to the mixed aqueous solution of 0.5mol / L urea and 0.1mol / L potassium hydroxide, and stir the reaction at 120°C 1h, discharge after cooling, and obtain hydrolyzed protein with a solid content of 5%;

[0049] (2) Take 6750g formaldehyde solution and 75g polyvinyl alcohol, heat to about 50°C and stir until the polyvinyl alcohol dissolves, add 2500g hydrolyzed protein after dissolution;

[0050] (3) Then adjust the pH of the solution to 7.5 with potassium hydroxide and ammonia water mixture, add 1500g of the first batch of urea, add 1500g of the second batch of urea after heating to 60°C, continue heating, and control the heating rate to 1.5°C / min, Keep warm for 50 minutes at 90°C;

[0051] (4) Regulate the pH of the solution with fo...

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Abstract

The invention belongs to the technical field of vegetable cultivation, and particularly relates to a preparation method of a seedling medium block and an application of the seedling meidum block, wherein the method comprises the following steps: controlling the hydrolysis condition to obtain hydrolyzed protein of different spatial structures by using the soybean meal as a raw material with low cost and easy availability, synthesizing hydrolyzed protein-urea-formaldehyde segmented copolymer by an alkali acid-base method, and adding a water-soluble fertilizer, a foaming agent, a common medium and a curing agent after synthesis to prepare a seedling medium block. The seedling medium block prepared by the method of the invention not only increases the porosity but also regulates the moisture and nutrient content. At the same time, the foaming modified urea-formaldehyde resin is rich in elements such as nitrogen, phosphorus and potassium, and is also a whole biodegradable material to release nitrogen, phosphorus and potassium in the degradation process.

Description

technical field [0001] The invention belongs to the technical field of vegetable cultivation, and in particular relates to a preparation method of a seedling-raising matrix block and an application of the seedling-raising matrix block. Background technique [0002] Soilless cultivation refers to the cultivation method that uses substrate instead of natural soil or only substrate when raising seedlings, and irrigates with nutrient solution after planting, which can save land. Because soilless cultivation can artificially create a good rhizosphere environment, it can effectively prevent soil Continuous crop disease and physiological obstacles caused by soil salt accumulation can fully meet the needs of crops for mineral nutrition, water, gas and other environmental conditions, and the basic materials for cultivation can be recycled, so it has the advantages of water saving, fertilizer saving, labor saving and high yield. High quality and other characteristics. [0003] Urea-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/029
Inventor 曲萍夏礼如赵永富
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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