Production method of natural organic seaweed fertilizer

Abstract

The invention provides a production method of a natural organic seaweed fertilizer. The method comprises the following steps: treating seaweeds by using a method of combining mechanical crushing centrifugation with chemical alkali digestion, washing the digested slurry material with water and performing filtration and concentration so as to obtain a corresponding semi-solid filter material; compounding the dried filter material; and producing the compounded filter material by using a granulating process so as to obtain the organic seaweed fertilizer. According to the method, a relatively small amount of alkali is added and an enzyme agent is not used, i.e., and the increasing of the additional cost is avoided, so that the requirement on the working environment of a reaction kettle is relatively low. The produced organic seaweed fertilizer contains a large quantity of organic substances without containing nitrogen and multiple mineral nutrients such as potassium, magnesium and zinc, and particularly contains seaweed polysaccharides and highly unsaturated fatty acids which are specifically contained in the seaweeds and is rich in multiple plant growth regulators such as cytokinins and auxins, thereby having the high biological activity. Thus, the absorption and the growth of plants are promoted by the beneficial substances from the seaweed plants. As a result, the stress resistance of crops is improved; the yield of the crops is increased.

Description

technical field [0001] The invention relates to a production process for extracting pulp from algal plants to produce seaweed fertilizer. More specifically, the invention relates to a production method for preparing seaweed fertilizer by extracting active ingredients from the algae treated with a mechanical method combined with a chemical method. Background technique [0002] The use of chemical fertilizers has played an important role in increasing agricultural production, but since the early 1980s, due to the unrestricted large-scale use of single chemical fertilizers, the ecological environment and soil microbiota have been damaged to varying degrees, resulting in a decrease in the quality of crops. "Vegetables are tasteless, melons are not sweet, and fruits are not fragrant", which seriously affects the sustainable development of agriculture. With the pollution caused by single chemical fertilizers to agriculture becoming more and more prominent, and people's attention t...

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Problems solved by technology

[0006] Chinese patent CN200810238683.9 directly uses potassium hydroxide configuration solution to digest seaweed, uses a single lye, and mainly involves algae such as kelp, sargassum, and Ascophyllum nodosum; Chinese patent CN102276326A uses seaweed crushed liquid combined with biological enzymes to obtain Organic liquid fertilizer mainly involves algae such as kelp, sargassum, and macroalgae. However, due to the use of biological enzyme fermentation technology, it has strict requirements on the fermentation and extraction environment, and requires strict control of factors such as pH value, temperature, and other microbial pollution. On the other hand, it is expensive The use of enzymes, liquid fertilizer filling, storage and transportation also increase the cost of extracting seaweed fertilizer; Chinese patent CN102491798A uses ultrasonic waves to break the wall to extract seaweed fertilizer; Chinese patent CN102503707A uses potassium hydroxide to digest seaweed, It mainly involves giant algae and Enteromorpha. The process involves the melting of urea, which is unstable and easy to decompose when heated. The decomposition temperature is 132.7 degrees Celsius, which is just in the patented preparation temperature range. Therefore, there is a problem that the decomposition of active ingredients in fertilizers decreases. Risk; Chinese patent CN102584440A uses low-temperature and high-pressure technology to decompose seaweed, involving sargassum, and low-temperature and high-pressure equipment is complicated and energy consumption is high

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