Humic-acid slow-release fertilizer rods and preparation method thereof

The invention discloses humic-acid slow-release fertilizer rods and a preparation method thereof. The humic-acid slow-release fertilizer rods are prepared from 10-35 parts of humic acid powder, 15-35 parts of nitrogen fertilizer, 10-25 parts of phosphate fertilizer, 10-30 parts of potash fertilizer, 2-6 parts of a water-soluble water-retaining agent and 0-30 parts of packing materials. The preparation method comprises the following steps that 1, the humic acid powder, the nitrogen fertilizer, the phosphate fertilizer, the potash fertilizer, the water-soluble water-retaining agents and the packing materials are mixed by adding water according to the using quantity to obtain mixed materials; 2, the mixed materials are molded by adopting an extrusion technology, and then the humic-acid slow-release fertilizer rods are obtained. According to the humic-acid slow-release fertilizer rods and the preparation method thereof, humic acid and the fertilizer rods are effectively and organically combined, and therefore the humic-acid slow-release fertilizer rods not only have the functions, achieved by humic acid fertilizer products, of enhancing the stress resistance of crops, improving the product quality and the like, but also can enhance the slow-release effect of fertilizer nutrients, reduce the nutrient leaching loss, increase the fertilizer utilization rate, simplify the fertilizer processing technology and save the production cost.