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Slow-release seaweed fertilizer with high water-retaining property and preparation method thereof

A slow-release fertilizer and water-retaining technology, which is applied in the field of high-water-retaining slow-release seaweed fertilizer and its preparation, can solve the problems that the coating material has not been reported yet, achieve the goal of improving compressive strength, alleviating environmental pollution, and preventing soil compaction Effect

Inactive Publication Date: 2014-05-28
漳州市新明生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carrageenan gel matrix is ​​widely used in drug delivery systems and special coating materials, but it has not been reported as a coating material in agriculture

Method used

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  • Slow-release seaweed fertilizer with high water-retaining property and preparation method thereof
  • Slow-release seaweed fertilizer with high water-retaining property and preparation method thereof
  • Slow-release seaweed fertilizer with high water-retaining property and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of high water retention slow release seaweed fertilizer.

[0031] (1) Preparation of carrageenan-grafted polyacrylic acid / diatomaceous earth superabsorbent resin

[0032] According to the weight ratio, under the protection of nitrogen, 5 g of carrageenan and 500 g of water were dissolved in a reaction kettle for 30 minutes, and the water temperature was 80° C. After the carrageenan is completely dissolved into a uniform transparent solution, cool to 60°C, add 7g of acrylic acid, 12g of cross-linking agent N,N'-methylenebisacrylamide and 300g of diatomaceous earth powder, and stir for 10 minutes. Then, 21 g of ammonium persulfate as an initiator was added into the reactor to initiate polymerization. The polymerization reaction stops after continuing for 3 hours at 80° C., and the product is dried, pulverized, passed through an 80-mesh sieve, and stored for future use.

[0033] (2) Preparation of carrageenan gel matrix

[0034] 40 g of carrageenan was disso...

Embodiment 2

[0039] Preparation of high water retention slow release seaweed fertilizer.

[0040] (1) Preparation of carrageenan-grafted polyacrylic acid / diatomaceous earth superabsorbent resin

[0041] According to the weight ratio, under the protection of nitrogen, 0.6kg of carrageenan and 80kg of water were dissolved in a reaction kettle for 30 minutes, and the water temperature was 80°C. After the carrageenan is completely dissolved into a uniform transparent solution, cool to 65°C, add 0.7kg of acrylic acid, 1.2kg of cross-linking agent divinylbenzene and 60kg of diatomaceous earth powder, and stir for 15 minutes. Initiator 2.1kg potassium persulfate is then added in the reactor to initiate polymerization. The polymerization reaction stopped after continuing for 3 hours at 80° C., and the product was dried, pulverized, passed through a 100-mesh sieve, and stored for future use.

[0042] (2) Preparation of carrageenan gel matrix

[0043] 0.4 kg of carrageenan was dissolved in 400 L ...

Embodiment 3

[0048] Get implementation example 2 high water retention slow-release seaweed fertilizer HFN001 and measure its nitrogen release rate in soil. figure 2 It is a graph showing the release rate of nitrogen in the soil over time for the high water retention slow-release seaweed fertilizer HFK001. It can be seen from the figure that after being buried in the soil for 2, 15 and 25 days, the release rates of nitrogen in the coated fertilizer were 41%, 75% and 94%, respectively. Good sustained release. Nitrogen exhibited a rapid release rate during the first 5 days, which was attributed to the dissolution of inner-core urea particles. After the coated fertilizer is buried in the soil, its outer coating superabsorbent resin will absorb the soil solution and slowly swell to become a hydrogel. The water absorbed by the superabsorbent resin diffuses slowly into the fertilizer core, dissolving the urea particles. At the same time, due to the swelling of the gel, the three-dimensional n...

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Abstract

The invention discloses a slow-release seaweed fertilizer with a high water-retaining property and a preparation method thereof. The slow-release seaweed fertilizer with the high water-retaining property comprises components in parts by weight as follows: 2-200 parts of a cross-linking agent, 3-200 parts of an initiating agent, 1-100 parts of carrageenan, 2-800 parts of acrylic acid, 10-900 parts of diatomaceous earth and 40-300 parts of specific fertilizer source. According to the slow-release seaweed fertilizer with the high water-retaining property, the surface of super absorbent resin on the outer layer is rough and porous, and the surface of carrageenan gel matrix on the inner layer is flat and compact, so that a water holding capacity and a water-retaining rate of soil can be increased, the evaporation of water is reduced, the irrigation cycle of the soil is prolonged, and the utilization rate of water is increased; and meanwhile, the soil is prevented from hardening, a good slow-release property and high compressive strength are achieved, and production, transportation and practical use of the fertilizer are facilitated.

Description

technical field [0001] The invention relates to the field of crop fertilizer production and application, more specifically, the invention relates to a high water retention slow-release seaweed fertilizer and a preparation method thereof. Background technique [0002] The sustainable development of agriculture is the foundation of the sustainable development of human society and economy. Our country has little land and a lot of people, and the per capita possession of land resources, especially the limited amount of cultivated land resources, to solve the food problem, it is necessary to increase the output per unit of land. Fertilization has played a positive role in increasing food production, increasing agricultural income, and maintaining soil fertility. People have recognized the importance of soil fertility maintenance for crop yield. Soil nutrient is the most important material basis of soil fertility, and fertilizer is the main source of soil nutrient, so it is also ...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
Inventor 不公告发明人
Owner 漳州市新明生物科技有限公司
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