Rice special controlled-release fertilizer applied once in processes of rice transplantation and seedling culture and preparation method thereof

Abstract

The invention relates to a rice special controlled-release fertilizer applied once in processes of rice transplantation and seedling culture and a preparation method thereof. The controlled-release fertilizer comprises the following raw materials: urea coated with sulfur and high molecular polymer, compound fertilizer coated with sulfur and high molecular polymer, 6% of thermoplastic and thermosetting double-layer coated urea, compound fertilizer coated with humic acid and zinc sulfate. The preparation method comprises the following steps of: weighing all the raw materials according to the formula, putting the raw materials into a stirrer for stirring and mixing uniformly, metering, and packing. The nutrient release of the controlled-release fertilizer of the invention is matched with the nutrient absorption of rice; the controlled-release fertilizer can not harm seeds when the controlled-release fertilizer is in direct contact with the seeds; the controlled-release fertilizer can be applied to the places near seeds in the processes of the rice transplantation and the seedling culture, can not harm the seeds, and is beneficial to absorption of root systems; and on the basis of ensuring the rice yield, the consumption of the fertilizer can be greatly reduced, and the utilization rate of the fertilizer can be improved.

Description

technical field [0001] The invention relates to a special controlled-release fertilizer for rice, in particular to a special controlled-release fertilizer for rice that does not harm rice seeds and is applied to seedling soil at one time when transplanting seedlings and a preparation method thereof, and belongs to the technical field of controlled-release fertilizer production. Background technique [0002] Rice is one of the most important food crops in my country, and the national rice planting area accounts for about 30% of the food crop area. In recent years, with the introduction of a series of national policies to benefit farmers, the economic benefits of rice production have increased year by year. However, compared with economic crops, the economic benefits of rice cultivation are relatively low, and farmers are unwilling to invest too much labor and time. Simplifying cultivation techniques is the development direction of rice cultivation. At present, my country's r...

AI Technical Summary

Problems solved by technology

However, their inorganic coating materials and water-based coating materials are prone to rupture of the membrane shell, resulting in the sudden release of nutrients in the membrane. In addition, the formula contains quick-acting chemical fertilizers. If they come into contact with seeds or roots, it is easy to cause seed burning. or root burning phenomenon, so these controlled-release fertilizers can only be used as base fertilizer for full-layer application, and cannot be effectively combined with the current advanced rice seedling raising technology and mechanical transplanting technology

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