Special active humic urea controlled-release compound fertilizer for garlic and preparation method of compound fertilizer

Abstract

The invention discloses a special active humic urea controlled-release compound fertilizer for garlic and a preparation method of the compound fertilizer. A low-activity humic acid raw material is used as a raw material, compound fertilizer production equipment is combined, urea and ammonium sulfate are used as active agents, the humic acid in the humic acid raw material is transformed and activated in an activating reaction tank by using a molten ammonium sulfate-urea solution to form an active humic urea solution, compound fertilizer production is combined, the active humic urea solution is sprayed onto compound fertilizer materials in a granulation barrel, rolling granulation, drying and screening are carried out, and the special humic urea controlled-release fertilizer product for the garlic is obtained. The compound fertilizer has the characteristics of simple operation process, low cost, high production capacity, bright and round granules, efficient release control of nutrients, high utilization rate and the like, can be used for greatly improving the yield and quality of crops and improving the fertilized soil, and has a very broad market prospect.

Description

technical field [0001] The invention relates to a method for preparing a slow-release compound fertilizer of urea rot, in particular to a method for making an active urea rot slow-release compound fertilizer using weathered coal, lignite or peat as raw materials and according to the nutrient requirements of garlic. Background technique [0002] The origin of garlic is in West Asia and Central Asia. It has a history of more than 2,000 years since Zhang Qian of the Han Dynasty traveled to the Western Regions and brought garlic back to China. Garlic is an indispensable condiment in the daily life of various countries, and it has become a hot research topic for scientists because of its huge nutritional, health care and medicinal value. [0003] Garlic absorbs the most nutrients from nitrogen, followed by potassium, calcium, phosphorus and magnesium. In addition, sulfur is a constituent element of garlic quality. Appropriate application of sulfur fertilizer can increase the ...

AI Technical Summary

Problems solved by technology

At present, quick-acting fertilizers are mainly used in garlic production, and the widely used plastic film mulching has increased the difficulty of topdressing. In order to save labor, some garlic farmers apply 60% to 80% of nitrogen fertilizer and all phosphorus and potassium fertilizers at one time when planting ( The rest of the nitrogen fertilizer should be used as topdressing in the next spring), but this does not conform to the nutrient absorption characteristics of garlic; in addition, the quick-acting fertilizer decomposes quickly and is difficult to be fixed by the soil, making this traditional fertilization method very easy to cause a large loss of available nutrients in winter. thus reducing the fertilizer use efficiency

At the same time, the use of trace elements is insufficient, which also affects the yield and quality of garlic.

The current use of controlled release fertilizers is quite common, but its relatively high price discourages the majority of farmers