Preparation method of fertilizer containing high molecular composition

Abstract

The invention relates to a preparation method of a fertilizer containing a high molecular composition. The preparation method comprises the following steps: adding an organic or inorganic granulated fertilizer into a pelletizer; under the condition that the pelletizer continuously rotates, uniformly spraying a high molecular composition solution so that the high molecular composition solution is uniformly distributed on the surface of the organic or inorganic granulated fertilizer and no plus residual glue solution is left in the pelletizer, wherein the high molecular composition is prepared from the following components in percentage by weight: 10-20% of guar gum, 20-30% of nonionic polyacrylamide, 20-30% of potassium polyacrylate and 20-30% of polyvinyl alcohol; spraying calcium-containing powder on the surface of the granulated fertilizer and continuously rotating till the organic or inorganic granulated fertilizer is uniformly coated; finally, drying and sieving the coated granulated fertilizer to prepare the self-cured film-coated controlled-release fertilizer. The fertilizer can increase the movement speed and the movement distance of phosphatic fertilizer, reduce the probability that the phosphatic fertilizer is cured, enhance the water retentivity and the nutrient preserving capability and improve the utilization ratio of the chemical fertilizer.

Description

technical field [0001] The invention relates to a preparation method of a fertilizer containing a polymer composition, belonging to the field of agricultural chemical fertilizer application. Background technique [0002] Existing high molecular polymers increase the utilization rate of fertilizers, and their product equipment and processes are relatively high in production costs, which is difficult to accept in the market, and a large number of experimental results show that some soils have high phosphorus content, but the utilization rate of phosphorus in crops is very low. Low, only 10-25%, the main reason is that phosphorus fertilizer has little mobility in the soil and is easy to be chemically fixed. The moving distance of phosphorus in the soil is generally 1-3cm, most of which are concentrated within 0.5cm around the fertilization point. Due to the low utilization rate of phosphorus fertilizer in the current season, the low conversion utilization rate of phosphorus fe...

AI Technical Summary

Problems solved by technology

Due to the low utilization rate of phosphorus fertilizer in the current season, the low conversion utilization rate of phosphorus fertilizer also restricts the absorption and utilization of other elements by plants, which is one of the reasons affecting the overall utilization rate of chemical fertilizers.

[0003] By simply increasing the amount of phosphate fertilizer to make up for the deficiency caused by the low utilization rate of phosphate fertilizer, more useful ions in the soil such as calcium, magnesium, iron, manganese, zinc, copper and other elements in the soil will be fixed by the phosphate fertilizer and lost. Due to the ion activity, it exacerbates the imbalance of plant nutrients in the soil, reduces crop yield, and deteriorates crop quality; due to the low utilization rate of chemical fertilizers, in order to achieve high yield per unit area, the amount has to be increased, resulting in environmental pollution and waste of resources