Plant micronutrient slow-release system based on boron nitride nanosheet conjugation as well as preparation method and application of plant micronutrient slow-release system

Abstract

The invention discloses a plant micronutrient slow-release system based on boron nitride nanosheet conjugation and a preparation method and application thereof, and relates to material modification. The preparation method comprises the following steps: performing ultrasonic treatment on original hexagonal boron nitride powder, adding acid or alkali for activation, standing, collecting upper emulsion, centrifuging, collecting precipitate to obtain a stripped boron nitride sheet layer, adding molten ionic liquid, stirring, centrifuging, collecting precipitate to obtain an ionic liquid stripped and functionalized boron nitride sheet layer; then adding polyoxometallate to carry out an ion exchange reaction, and after a hydrothermal reaction, centrifugally collecting precipitate to obtain the polyoxometallate-anchored ionic liquid modified boron nitride composite material. The green ionic liquid is used for stripping and functionalizing boron nitride, boron nitride interlayer anchoring polyoxometallate is driven, and the compound has a remarkable slow release behavior on metal ions and a good inhibition effect on soil-borne disease ralstonia solanacearum in soil or a solvent, can be applied to prevention and control of soil-borne bacterial wilt, and has a good application prospect. And the dispersion liquid seed soaking has the effect of remarkably promoting plant growth.

Description

technical field [0001] The invention relates to the field of material modification, in particular to a slow-release system based on boron nitride nanosheets conjugated with plant micronutrients and its preparation method and application. Background technique [0002] With the rising demand for food, in economic crop areas, due to the long-term excessive input of chemical fertilizers and pesticides and single continuous cropping of economic crops, soil-borne diseases occur frequently, causing major economic losses. Soil-borne diseases are one of the important manifestations of the degradation of soil biological functions under high-intensity utilization. Take soil-borne bacterial wilt as an example. The route of transmission is to infect the root system of plants in the soil, and to infect the stems through vascular bundle transport upwards, mostly during the fruit setting stage of plants. The pathogenic bacteria (Ralstonia solanacearum, referred to as Ralstonia solanacearum...

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Problems solved by technology

However, single application of such nutritional supplements is prone to loss on the soil surface, and trace element fertilizers (such as molybdenum fertilizer: ammonium molybdate) are prone to leaching loss during seed dressing or spraying, and long-term excessive application will cause Cause soil compaction, cause soil accumulation toxicity, low efficiency and other problems, if the plant is malnourished, it will directly affect the quality and yield of crops

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