Special organic/inorganic compound fertilizer for sugarcane produced by use of filter mud from sugar factory

Abstract

The invention discloses a special organic / inorganic compound fertilizer for sugarcane produced by use of the filter mud from a sugar factory. The special organic / inorganic compound fertilizer is prepared from the following raw materials in percentage by weight: 4.17-42.87% of urea, 11.52-60.87% of calcium superphosphate or calcium magnesium phosphate, 3.33-16.66% of potassium chloride and 25.0-37.5% of dry filter mud. The special organic / inorganic compound fertilizer is prepared by the following steps of: (1) stacking the filter mud for natural fermentation; rotting the stacked filter mud for ripening from top to bottom; spreading the rotten filter mud; drying in the sunlight until the water content is 15-25%, and grinding the filter mud by a grinder; adding nitrogen, phosphorus and potash fertilizer into the filter mud after fermentation and grinding according to the proportion of the raw materials; mixing and then grinding, granulating, drying, cooling and screening; and packaging to obtain a finished product. The special organic / inorganic compound fertilizer disclosed by the invention has the advantages of long fertilizer efficiency, soil improvement, soil fertility improvement, avoidance of soil hardening and the like, can effectively improve the yield per unit by 0.5-1.0 ton of sugarcane and the sugar content of the sugarcane by 0.5-1.0%, and also can improve the utilization rate of the chemical fertilizer by 3-5%.

Description

technical field

[0001] The invention relates to a special organic-inorganic compound fertilizer for sugarcane produced by utilizing filter mud of a sugar factory. Background technique

[0002] Sugarcane is an important sugar crop in my country. It has a long growth cycle, requires a large amount of fertilizer, and needs comprehensive nutrients. For many years, sugarcane fields have only applied chemical fertilizers, but less organic fertilizers have been used. The organic fertilizers have not been replenished for many years, resulting in serious degradation of soil fertility in sugarcane fields, and the potential for increasing sugarcane production is getting smaller and smaller. Organic-inorganic compound fertilizer is a compound fertilizer that contains both organic matter and appropriate amount of chemical fertilizers. At present, the utilization rate of nitrogen fertilizer in our country is always about 30%. There are several ways to improve the utilization rate of chem...