Biomass charcoal-based nitrogenous fertilizer and preparation method thereof

Abstract

The invention belongs to the technical field of biomass charcoal fertilizers, in particular relates to a biomass charcoal-based nitrogenous fertilizer and further discloses a preparation method of thebiomass charcoal-based nitrogenous fertilizer. The biomass charcoal-based nitrogenous fertilizer is prepared by mixing biomass charcoal as a carrier with a nitrogenous fertilizer, with the combination of high pressure steam and biomass charcoal with properties of super adsorption and loosened and porous surfaces, nitrogenous fertilizer powder can be well combined with the biomass charcoal, the wrapping property of the fertilizer can be improved through an adhesive and packing, and thus a good granular shape with appropriate hardness can be formed. On one hand, decomposition and valorization of the nitrogenous fertilizer can be retarded, the purpose of gradually releasing nitrogen can be achieved, and by slowly releasing nitrogenous fertilizer components such as urea, the fertilizer effectis prolonged, and fertility loss is reduced; meanwhile, plant root system development and in-vivo nitrogen metabolism can be promoted, nitrogen absorption can be promoted, and the nitrogenous fertilizer utilization rate is increased; and in addition, transportation and storage of the fertilizer can be facilitated, and the fertilizer is applicable to field application.

Description

technical field [0001] The invention belongs to the technical field of biomass charcoal fertilizers, in particular to a biomass charcoal-based nitrogen fertilizer, and further discloses a preparation method thereof. Background technique [0002] As a means to greatly increase crop yield, the application of chemical fertilizers occupies a very important position in my country's agriculture, but there are also a series of problems, the most important of which is the low utilization rate of chemical fertilizers. Studies have shown that under the agricultural production level at that time, the seasonal nitrogen utilization rate of my country's main food crops was only 30%-35%. Unreasonable application of nitrogen fertilizer not only causes huge economic waste, but also causes a series of environmental pollution problems. Statistics show that China's annual soil nitrogen surplus due to unreasonable nitrogen fertilizer application is more than 10 million tons, and the direct econ...

AI Technical Summary

Problems solved by technology

[0005] However, the current fertilizers based on biochar are simply blended or coated with granulation, which cannot achieve the expected effect.

The former belongs to the category of compound fertilizer. Although it has a certain effect on nutrients and soil improvement, it cannot achieve a real slow-release effect; the latter uses coating technology to achieve nutrient loading, but either cannot achieve good granulation Effect, or the membrane structure is too thick so that the release of fertilizer effect is too slow, resulting in crops unable to absorb sufficient nutrients

It can be seen that the existing biochar matrix nitrogen fertilizer still has some defects in the slow release of fertilizer effect.

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