Low-cost high-efficiency loss-control slow-release double-control coated fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of fertilizers, in particular to a low-cost efficient loss-control slow-release double-control coated fertilizer and a preparation method thereof. The method comprises the steps: putting a granular fertilizer into a stirrer, spraying a loss control agent dissolved with water to the granular fertilizer under a stirring condition, then heating the granular fertilizer to 60-80 DEG C and performing drying; and then continuing heating, spraying a vegetable oil modified degradable resin coating material to the granular fertilizer under a stirring condition, performing uniform stirring, adding a curing agent, and performing cooling after curing to obtain the low-cost high-efficiency loss-control slow-release double-control coated fertilizer. Loss control and slow release are combined, dual fertilizer control of loss control and slow release is achieved, the surfaces of fertilizer particles are coated with the loss control agent and the slow release agent in sequence through a coating technology, the fertilizer particles are coated with the loss control agent during first-time coating, the fertilizer particles are coated and cured with the vegetable oil modified degradable resin for second time after drying, the release of nutrients is delayed through the slow-release coating, and meanwhile, the loss of the released fertilizer nutrients is prevented through the loss control agent.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a low-cost, high-efficiency loss-controlling, slow-release double-control coated fertilizer and a preparation method thereof. Background technique [0002] Fertilizers are rich in nitrogen and phosphorus elements. Due to improper use of fertilizers and low utilization rates, a large amount of nitrogen or phosphorus flows into rivers and lakes through surface water runoff, or enters groundwater, or enters the atmosphere, and a large amount of nitrogen or phosphorus enters rivers and lakes. , leading to eutrophication of rivers and lakes, and the nitrogen entering the atmosphere will increase the greenhouse effect. It can be seen that the loss of fertilizer nutrients has a huge impact. [0003] In actual agricultural production, the application of slow-release fertilizers is relatively common. Slow-release fertilizers, also known as slow-acting fertilizers, can replace some of...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, simultaneous sowing of seeds and fertilizers is often used during planting, that is, seeds and fertilizers are sown into the ground at the same time. For the above-mentioned existing fertilizers, there is no need for nutrients when the seeds are not germinated, and the fertilizer nutrients are already being released, resulting in nutrient loss.

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