Efficient slow-release bulk-blending (BB) fertilizer and preparation and application method thereof

Abstract

The invention relates to efficient chemical fertilizers, in particular to an efficient slow-release bulk-blending (BB) fertilizer and a preparation and application method thereof. The efficient slow-release BB fertilizer is composed of urea nitrogen fertilizers, phosphatic fertilizers, potash fertilizers, secondary nutrient elements required by plants and trace nutrient elements required by the plants. Measured according to urea pure nitrogen amount of the urea nitrogen fertilizers, urea nitrogen fertilizer amount are 40-46.3% of the pure nitrogen amount, phosphatic fertilizer amount is 30-90% of the pure nitrogen amount, the potash fertilizer amount is 45-100% of the pure nitrogen amount, secondary nutrient elements comprise calcium taking up 10-45% of the pure nitrogen amount and magnesium occupying 5-35% of the pure nitrogen amount, and the trace nutrient elements comprise ferrum occupying 0.1-5% of the pure nitrogen amount, copper occupying 0.1-3% of the pure nitrogen amount, manganese occupying 0.5-3% of the pure nitrogen amount, zinc occupying 0.1-2% of the pure nitrogen amount, boron occupying 0.05-2% of the pure nitrogen amount and molybdenum occupying 0.01-2% of the pure nitrogen amount. Nitrogen fertilizer dosage and proportion of the efficient slow-release BB fertilizer are set fully according to fertilizer requiring characteristics to nitrogen of the plants at different growth periods, continuous supplying of the fertilizer nitrogen is guaranteed, and loss of a nitrogen fertilizer is controlled remarkably.

Description

technical field [0001] The invention relates to a high-efficiency chemical fertilizer, in particular to a high-efficiency slow-release blended BB fertilizer and its preparation and application method. Background technique [0002] In the current agricultural production, ordinary fertilizers have short fertilizer effect period, unreasonable nutrient distribution ratio, unscientific and unbalanced nutrient supply, especially the more prominent scientific problems of nitrogen fertilizer supply and demand. At present, the overall utilization rate of nitrogen is only 30-35%. Nitrogen leaching, volatilization, surface runoff and other losses are relatively large, and the economic benefits of fertilizer application are low, resulting in a huge waste of resources and an increase in agricultural production costs. The greenhouse gas effect and the eutrophication of water body make the ecological environment worse. Extensive application of fertilizers and low utilization rates degrade...

AI Technical Summary

Problems solved by technology

[0002] In the current agricultural production, ordinary fertilizers have short fertilizer effect period, unreasonable nutrient distribution ratio, unscientific and unbalanced nutrient supply, especially the more prominent scientific problems of nitrogen fertilizer supply and demand.

At present, the overall utilization rate of nitrogen is only 30-35%. Nitrogen leaching, volatilization, surface runoff and other losses are relatively large, and the economic benefits of fertilizer application are low, resulting in a huge waste of resources and an increase in agricultural production costs. The greenhouse gas effect and the eutrophication of water bodies degrade the ecological environment

Extensive application of fertilizers and low utilization rates degrade the quality of agricultural products and affect soil structure and physical and chemical properties

Due to the concentrated release of nitrogen nutrients from ordinary fertilizers or the uncoordinated release ratio of nitrogen, phosphorus, and potassium nutrients, fertilizers supply nutrients to plants unbalanced, and cause nutrient stress to the plant growth environment, that is, when plants do not need a large amount of nutrients Release a large amount of nutrients into the soil, but there is not enough nutrient supply when plants need a lot of nutrients, so it will cause nutrient stress to the growth of plants, which will seriously affect the quality of agricultural products and the development of agricultural production