A special slow-controlled release fertilizer composition for summer corn, its preparation method and application

Abstract

The invention relates to a special slow controlled release fertilizer composition for summer maize as well as a preparation method and an application of composition. The special slow controlled release fertilizer composition is prepared from a composition I, a composition II and a composition III in a mass ratio of 1: 5: 4, wherein the composition I is prepared from the following raw materials in percentage by mass: 30% of a calcium magnesium phosphate fertilizer, 40% of potassium sulphate, 15% of zinc sulfate heptahydrate, 10% of ferrous sulfate heptahydrate and 50% of borax decahydrate; the composition II is prepared from the following raw materials in percentage by mass: 47.5% of urea, 17.5% of monoammonium phosphate, 20% of potassium chloride, 10% of sulfur and 5% of a mixture of an ethylene-vinyl acetate copolymer and paraffin; the composition III is prepared from urea and formaldehyde in a mass ratio of 6: 1. The invention further relates to a preparation method of the special slow controlled release fertilizer composition as well as the application of the fertilizer for planting summer maize. The special slow controlled release fertilizer composition for summer maize provided by the invention has the characteristics of long controlled release time, high efficiency, environment-friendliness, safety and economical benefit.

Description

technical field [0001] The invention relates to a special slow and controlled release fertilizer composition for crops, in particular to a special slow and controlled release fertilizer composition for summer corn, as well as its preparation method and application. Background technique [0002] Slow-release fertilizers, also known as long-acting fertilizers in a broad sense, refer to fertilizers whose nutrient release rate is slow and the release period is long, and can meet the needs of crop growth during the entire growth period of crops; but in a narrow sense, it refers to fertilizers through various mechanisms Measures pre-set the release mode of fertilizers during the crop growth season, so that the nutrient release law is basically synchronized with the crop nutrient absorption, so as to achieve the purpose of improving fertilizer efficiency. At present, the existing corn slow-release fertilizers only slow-control nitrogen, and the slow-control period is about 50 days,...

AI Technical Summary

Problems solved by technology

At present, the existing corn slow-release fertilizers only slow-control nitrogen, and the slow-control period is about 50 days, and some capsules rupture early and release nitrogen in advance, resulting in nutrient loss and low nutrient utilization. The role and effect of slow and controlled release fertilizers, and even the phenomenon of burning seeds and seedlings; at the same time, there is little research on the slow control of potassium in the existing slow and controlled release fertilizers for corn, so that after the potassium in the fertilizer is applied to the soil, the corn Excess potassium in the soil at the early stage of growth, coupled with the frequent alternation of soil dryness and wetness in July and August, soil clay mineral potassium fixation and potassium leaching increased, and the utilization efficiency of potassium was low, resulting in potassium deficiency in the later stage of corn growth, affecting the yield and production of corn. quality; in addition, the content standards of trace elements in existing corn slow-release fertilizers are not high