| 摘要 |
The present invention relates to a method for producing a natural anhydrous gypsum fertilizer and, more specifically, to a method for producing a calcareous fertilizer by mixing natural anhydrous gypsum and a fertilizer. The method according to the present invention comprises: a first step of producing natural anhydrous gypsum into fine powder of 50 μm; a second step of mixing 4 parts by weight of an animal liquefied fertilizer with respect to 1 parts by weight of the natural anhydrous gypsum; and a third step of dipping and aging a mixture of the natural anhydrous gypsum and animal liquefied fertilizer mixed through the second step, wherein the animal liquefied fertilizer is produced by fermenting livestock excrement, and in the third step, the mixture of the natural anhydrous gypsum and animal liquefied fertilizer is aged for 84 hours at an indoor humidity of 60% and an indoor temperature of 15°C. The fertilizer produced through the third step is molded into a pill or pellet shape of 5 mm to be sprayed onto a paddy or a filed. According to the method of the present invention, natural anhydrous gypsum which does not contain heavy metals is mixed with a fertilizer, and a calcareous fertilizer which can be used for various soils and agricultural products is produced through a simple process, so the number of topdressing of the fertilizer and an elution speed of the fertilizer can be reduced. Moreover, pH of soil is adjusted to help easy growth of agricultural products, and resistance against harmful insects can be improved. |
