Winter wheat slow release fertilizer and preparation method thereof

Abstract

The invention relates to a winter wheat slow release fertilizer and a preparation method thereof. The winter wheat slow release fertilizer is characterized by comprising the following components in percentage by weight: 41% of normal superphosphate, 4% of potassium chloride, 1.8 to 2.5% of dicyandiamide, 4.2 to 6.5% of humic acid, 3 to 5% of kieselguhr or clay and the balance of urea. As the trial shown, the conventional fertilizing method of basal dressing and topdressing based on a certain ratio is completely changed by the winter wheat slow release fertilizer on the production of the winter wheat; by adopting the winter wheat slow release fertilizer, the basal dressing is only carried out once within the whole-growth period of the winter wheat, and no topdressing is needed along with the growth of the winter wheat, so that the fertilizing cost is reduced, the output and the quality of the winter wheat can be relatively improved, and the economic benefit is increased as well as the ecological benefit.

Description

technical field [0001] The invention relates to a slow-release fertilizer for winter wheat and a preparation method thereof. Background technique [0002] Winter wheat in the Yellow River irrigation area of ​​Ningxia developed in recent years due to the northward movement of winter wheat due to climate warming. The advantage of winter wheat is that its yield is higher than that of spring wheat, and it can be harvested about 20 days earlier, increasing the multiple cropping index in autumn. At present, the sown area has reached 650,000 mu, and there is a tendency to expand year by year. In the production of winter wheat, the average amount of fertilization in terms of pure nitrogen is 32.2kg per mu, phosphorus pentoxide is 16.4kg per mu, and potassium oxide is 3kg per mu. Among them, 60% of the nitrogen fertilizer and phosphorus and potassium fertilizers were applied as a base, and 30% of the nitrogen fertilizer was topdressed twice during the turning green stage and jointi...

AI Technical Summary

Problems solved by technology

[0003] Existing fertilization techniques have the following disadvantages: (1) The amount of nitrogen fertilization is generally too much, and the level of fertilization among farmers is also quite different, which is likely to cause a lodging rate of 20%-30%, resulting in poor stability of yield and quality

(2) The fertilizer utilization rate is low, and the soil nutrient balance is out of balance, resulting in serious pollution of the soil environment and water environment

(3) Farmers have different levels of mastery of fertilization technology. The technology is relatively complicated, and the labor input is large, which is not suitable for the current technical requirements of mechanized operations and soil-based fertilization.

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