Slow release fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of slow release fertilizers, and especially relates to a slow release fertilizer and preparation method thereof. An anti-sticking agent is added to an inner wrapped core, and is added after coating with a coating liquid in order to make the obtained slow release fertilizer effectively avoid clustering and agglomerating phenomena, and selection of the anti-sticking agent makes the anti-sticking agent avoid bonding of fertilizer components in the inner wrapped core, allows an inner wrapped core layer to be wrapped with an outer coating layer and avoids contact bonding between materials of the coating layer, so uniformity of nutrients in the slow release fertilizer is ensured; and an aqueous solution of konjac glucomannan and an aqueous solution of guanidine gum are adopted as the coating layer materials in the invention to make the slow release fertilizer have a good slow release cycle, and are combined to realize a better slow release cycle than individual adoption of the aqueous solution of konjac glucomannan and the aqueous solution of guanidine gum as a coating material film fertilizer, so nutrient demands of medium-and-short stage crops are well meet in the invention, thereby 90% of nutrients are released in the 30th to 80th days.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a slow-release fertilizer and a preparation method thereof. Background technique [0002] With the continuous development of agricultural production technology, and people's requirements for environmental quality are getting higher and higher, and as the current situation of traditional agricultural planting polluting the environment is becoming more and more prominent, the quality requirements for agricultural planting fertilizers are also increasing. The higher the higher, the agricultural fertilizer can not only provide nutrients for the crops, but also require the agricultural fertilizer to improve the soil, make the soil structure layer loose, the nutrients can be fully utilized, reduce the soil compaction rate, and reduce the cost of fertilization. [0003] Based on this, due to its own advantages, slow-release fertilizers have been developed and researched...

AI Technical Summary

Problems solved by technology

[0004] However, in the preparation process of slow-release fertilizers, most of the raw materials will use chemical fertilizers, and after the fertilizers are prepared and granulated, they will quickly agglomerate, resulting in changes in the quality of the granules, making it difficult to prepare the product. Larger, higher cost, and the slow-release quality of the slow-release fertilizer obtained is also poor, making the nutrients in the slow-release fertilizer uneven; in addition, after the slow-release fertilizer is wrapped into granules, due to the outer coating It is easy to agglomerate between them, which makes it difficult to fertilize during the fertilization process, and also leads to a short storage period and poor quality of the slow-release fertilizer.