Agricultural and forestry waste carbon-based slow release filter and preparation method thereof

A technology for agricultural and forestry waste and slow-release fertilizers, which is applied in agriculture, fertilization devices, fertilizer mixtures, etc., can solve problems such as degradation, nutrient release characteristics that cannot well meet crop growth, and soil pollution, and achieve reliable sources and improve soil quality. The effect of high charcoal inventory, fertilizer efficiency and density
CN102775236AInactive Publication Date: 2012-11-14GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
3 Cites 33 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Publication Date
2012-11-14
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses an agricultural and forestry waste carbon-based slow release filter and a preparation method thereof. The preparation method comprises the following steps: crushing agricultural and forestry waste into biomass particles, carrying out pyrolysis to prepare charcoal, dissolving monoammonium phosphate and monopotassium phosphate in water to prepare a saturated water solution of monoammonium phosphate and a saturated water solution of monopotassium phosphate, soaking charcoal prepared in step a in the saturated water solution of monoammonium phosphate and the saturated water solution of monopotassium phosphate so that adsorption capacity of charcoal to phosphate radical ions, ammonium ions and potassium ions is up to 80-90% of balanced adsorption capacity, then taking out charcoal, and drying at the drying temperature of 100-105 DEG C until the moisture content of the slow release filter is less than 5%, thus the agricultural and forestry waste carbon-based slow release filter is obtained. The agricultural and forestry waste carbon-based slow release filter disclosed by the invention is low in cost, long in slow release time and good in slow release effect, can be used for long term and can maintain soil fertility for a long time.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field:

[0001] The invention relates to a fertilizer and a preparation method thereof, in particular to an agricultural and forestry waste carbon-based slow-release fertilizer and a preparation method thereof. Background technique:

[0002] The earliest slow-release fertilizers were slightly soluble fertilizers, such as urea-formaldehyde and other urea-formaldehyde condensates and compounds that were mainly chemically degraded (such as isobutylene cyclic diurea). Slightly soluble fertilizers are mainly slightly soluble organic nitrogen compounds, which mainly provide nitrogen nutrients. The proportion of nitrogen provided by the low-molecular-weight urea-formaldehyde part exceeds the amount required by the crops in the early stage of crop growth. However, the high-molecular-weight part provides nitrogen too slowly. The release characteristics are not well suited to the needs of crop growth. Subsequently, a kind of physical barrier control fertilizer was developed, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More