JP2005089615A - Method for producing humic acid liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a humic acid liquid by which the decomposition of a useful material originally involved by the humic acid can be prevented. <P>SOLUTION: Water and an alkali aqueous solution are added to peat, and the resultant mixture is stirred and separated into liquid and a precipitate. The mixing ratio of the peat, water and the aqueous alkali solution are regulated so that the amount of the peat and the amount of the alkali aqueous solution may be 10-30 pts. wt. and 1-3 pts. wt. respectively, based on 100 pts. wt. water. Preferably, the alkali aqueous solution is the solution of one of sodium hydroxide, potassium hydroxide, slaked lime and ammonia, especially, potassium hydroxide. The peat is preferably Songhua river coal (R) produced in the northeast district of China. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for producing a humic acid solution useful as a soil conditioner and a fertilizer.

  Humic acid, also known as humic acid, is the core of soil organic matter. In addition to promoting the growth of crops and activating the roots, physical improvement of the soil itself, fertilization, microbial growth, diversification, etc. It plays a major role in comprehensive soil health. For this reason, conventional humic acid fertilizers include humic acid ammonia fertilizer, humic acid potassium fertilizer, humic acid bitter fertilizer, humic acid phosphorus fertilizer and the like, and various humic acid materials are supplied as soil improvement materials.

Humic acid used in these ordinary fertilizers and soil conditioners is usually called nitrohumic acid because it is produced by decomposing coal or lignite with nitric acid or nitric acid and sulfuric acid (see the following patent document). . However, such an acid decomposition product has a disadvantage that sugars and amino acids, which are inherently useful substances contained in humic acid, are decomposed to some extent.
JP-A-62-100495

  An object of this invention is to provide the manufacturing method of the humic acid liquid which can eliminate the said fault and can prevent decomposition | disassembly of the useful substance which humic acid inherently contains.

  The present invention is characterized in that water and an aqueous alkaline solution are added to peat and stirred to separate the liquid and the precipitate.

  In the present invention, since nitric acid or nitric acid and sulfuric acid are not used to obtain a humic acid solution, it is possible to prevent the decomposition of sugars and amino acids, which are inherently useful substances contained in humic acid.

  The present invention will be described in detail below.

  Peat (peats) is a product of reeds, reeds, sphagnum, etc. grown in cold lakes and decomposed under low temperature and anaerobic conditions. The formation of peat was most prominent during the transition from the glacial retreat to the warm season, when reeds, sedges, and sphagnum were swarming in the wetlands, and active peat carbonization was progressing. It is estimated that After that, in the dry zone where the temperature rose, it further decomposed and became corroded and became black mud, but it remained peat in the cold and humid zone.

  At present, the peat layer is distributed in the region between 45 ° and 65 ° north latitude, and extends to Canada, Russia, China, Alaska, Northern Europe and so on.

There are three types of peat, low peat, medium peat and high peat, depending on the production process. Any of them can be used in the present invention. In particular, Songhuajiang Charcoal (registered trademark), which is a high-ranking peat produced in Northeast China, is most preferred.
(1) Low-rank peat Reeds and sedges grow near the shores of shallow lakes, and their bodies accumulate in the water and are charred. Weakly acidic and contains a relatively large amount of inorganic components.
(2) Middle peat When the lower peat rises above the surface of the water, trees begin to invade it, and fallen leaves and twigs accumulate to form middle peat. The lower the peat, the less the decomposition, the less brown and muddy. It is slightly acidic and contains few inorganic components.
(3) Higher peat If the forestation of the middle peat zone progresses, sphagnum moss on the wet land, eventually overwhelming the forest to form a hill-shaped sphagnum sedimentary layer and peat carbonize to produce higher peat. . Decomposition has not progressed much, light brown, rich in fibers, rich in elasticity, strongly acidic and poor in inorganic components.

  What is commonly called peat is middle and high peat, and sphagnum peat (peet moss) is used as an improvement material for horticultural soil.

  As the alkaline aqueous solution, sodium hydroxide, potassium hydroxide, slaked lime, ammonia and the like can be used, and potassium hydroxide is particularly preferable.

  The mixing ratio of peat, water, and aqueous alkaline solution is preferably 10 to 30 parts by weight of peat and 1 to 3 parts by weight of aqueous alkaline solution with respect to 100 parts by weight of water. Stirring is performed at room temperature, and about 20 to 40 minutes is sufficient. The concentration of the humic acid solution obtained by filtering the separated liquid and the precipitate is 5 to 8%.

  The humic acid solution thus obtained is applied alone or mixed with a liquid composite fertilizer for irrigation.

The following effects can be obtained by using this humic acid solution on crops.
1． Forms water-resistant aggregates of soil, improves water permeability, water retention, drainage, and increases oxygen absorption capacity.
2． Reduces the phosphate absorption coefficient of soil and increases the effectiveness of phosphoric acid.
3． Forms that are easily absorbed by plants by chelating the minor elements of the soil.
Four. Increase soil cation exchange capacity.
Five. Increase the pH buffering capacity of the soil and remove the obstacles of acid and alkali.
6． Increase the metabolic activity of soil microorganisms, create a diverse ecological environment, and reduce continuous cropping obstacles.
7． Stimulates plant growth points and strongly promotes rooting.
8． In ppm (parts per million), it acts as an organic catalyst that gives activity to plants and stimulates the activities of plant enzymes to produce youthful and healthy crops.

To 1000 liters of water, add 200 kg of Songhuajiang Charcoal (registered trademark), a high-grade peat produced in Northeast China, and 18 kg of potassium hydroxide. While obtaining a humic acid solution, the precipitate was further filtered to obtain a humic acid solution. The concentration of the finished humic acid solution was 8%. The concentration of potassium hydroxide was 1.5%.

Claims (4)

A method for producing a humic acid solution, comprising adding water and an aqueous alkaline solution to peat, stirring, and separating the liquid and the precipitate. The method according to claim 1, wherein the mixing ratio of the peat, water and the aqueous alkaline solution is 10 to 30 parts by weight of peat and 1 to 3 parts by weight of the aqueous alkaline solution with respect to 100 parts by weight of water. The method according to claim 1, wherein the aqueous alkaline solution is any one of sodium hydroxide, potassium hydroxide, slaked lime, and ammonia. The method according to claim 1, wherein the peat is Songhuajiang charcoal (registered trademark) produced in Northeast China.