Composite fertilizer suitable for shrimp culturing paddy field and preparation method thereof

Abstract

The invention discloses a composite fertilizer suitable for a shrimp culturing paddy field and a preparation method thereof, and relates to the technical field of chemical fertilizer preparation. Thefertilizer comprises a nitrogen-phosphorus-potassium basic fertilizer, according to the composite fertilizer, the content of slow-dissolved nitrogen takes up 10% or above of the total nitrogen, soluble silica takes up 0.05% or above, soluble magnesium takes up 0.05% or above, biological activated calcium takes up 0.5% or above, and polymeric phosphorus takes up 20% or above of total phosphorus mass. The composite fertilizer has the advantages that nutritious ingredients can be slowly released, long-term effect is achieved after base application, topdressing times can be reduced, water body quality can be stabilized, labor intensity can be relieved, the loss of nutritious components is reduced, the fertilizer utilization rate is improved, the growing of rice is promoted by abundant medium or micro elements to improve the stress resistance of lodging resistance, disease resistance and the like of rice, the yield and income are increased, crayfish disease resisting and encroaching resistance are improved, the growing of crayfish is accelerated, so that the crayfish has large size, and labor force is saved while paddy field ecological environmental is protected.

Description

technical field [0001] The invention relates to a compound fertilizer and a preparation method thereof, in particular to a compound fertilizer suitable for shrimp paddy fields and a preparation method thereof, and belongs to the technical field of chemical fertilizer preparation. Background technique [0002] Paddy farming is to make use of the shallow water environment of the paddy field to properly transform the paddy field, so that the paddy field is suitable for farming aquatic products while planting rice, such as breeding shrimp, crab, turtle, frog, eel, fish, shellfish, etc. Water, grass, animal resources, insects, and other substances and energy are more fully utilized by the aquatic products raised, and the life activities of aquatic organisms raised in paddy field water bodies can provide weeding, insect removal, soil thinning, and fish manure for paddy fields. The purpose is to obtain the ideal effect of mutual benefit and double income of rice and fish. "Rice-fi...

AI Technical Summary

Problems solved by technology

[0009] Inorganic fertilizers are usually chemical fertilizers composed of inorganic salts, which do not have the above problems. They are generally nitrogen fertilizers (ammonium bicarbonate, ammonium chloride, urea), phosphate fertilizers (calcium superphosphate, calcium magnesium phosphate fertilizer), calcium fertilizers (quicklime, slaked lime, etc.) The advantage is that it is easy to use, the price is relatively cheap, and the fertilizer effect is fast; the disadvantage is that the fertilizer effect is short, and improper use can promote the explosive growth of cyanobacteria and harmful algae in a short period of time, causing harm to the cultured organisms; Acid-base imbalance, causing high ammonia nitrogen and nitrite content and deteriorating water quality