Biochar-based slow release fertilizer and preparation method thereof

A biochar based fertilizer and material technology, applied in nitrogen fertilizer, potash fertilizer, phosphate fertilizer and other directions, can solve the problems of insignificant effect, no specific effect of improving fertilizer utilization rate, high temperature of carbonization of CN106748196A, and achieve good pore structure and slow release performance. , Improve the effect of increasing production and reducing the effect of high temperature carbonization exhaust gas

Inactive Publication Date: 2021-05-18
天津市优质农产品开发示范中心 +1
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  • Abstract
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Problems solved by technology

[0005] The above-mentioned patent applications all reduce the carbonization temperature by adding phosphoric acid; however, CN111232977A uses it for the reductive degradation of nitrobenzene, and does not involve the application in the field of fertilizers, nor does it specifically verify the effect of improving the utilization rate of fertilizers ; CN106748196A is relatively high in the temperature of carbonization, and the process is complicated; while CN106748196A and CN107200666A still have no significant effect on the specific impact on crop growth
[0006] For rice fertilization, because rice cultivation will supplement water during the growth period, the introduction of water will cause nutrient loss, resulting in a decrease in fertilizer utilization rate; ordinary compound fertilizers have a 30% Left and right nitrogen and phosphorus leaching loss, because of the loss of nutrients, resulting in a decrease in yield

Method used

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  • Biochar-based slow release fertilizer and preparation method thereof
  • Biochar-based slow release fertilizer and preparation method thereof

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preparation example Construction

[0028] A preparation method of biochar-based fertilizer, the specific preparation steps are as follows: (1) grind crop stalks into powder with a special grinder, and take straw micropowder with a particle diameter not exceeding 5 mm for use; (2) use the stalks obtained in step (1) The straw micropowder and phosphoric acid are added into the kneader in a certain proportion, and the effectively soaked straw micropowder inside is obtained by setting the kneader blade speed and kneading temperature; the weight of the straw micropowder is 100kg, and the weight of the phosphoric acid solution is 5kg; (3) The soaked straw micropowder obtained in step (2) and urea, potassium sulfate, superphosphate, and potassium humate (commercially available raw materials can be used, and can also be obtained by reacting lignite with potassium hydroxide, which is a conventional acquisition method in the art) Add in the high-speed mixer according to a certain ratio, and mix at a high speed for a perio...

Embodiment 2

[0031] A preparation method of biochar-based fertilizer, the specific preparation steps are as follows: (1) grind crop stalks into powder with a special grinder, and take straw micropowder with a particle diameter not exceeding 5 mm for use; (2) use the stalks obtained in step (1) Add straw micropowder and phosphoric acid into the kneader according to a certain ratio, set the kneader blade speed and kneading temperature, and obtain straw micropowder effectively soaked inside; wherein the weight of straw micropowder is 100kg, and the weight of phosphoric acid solution is 5kg; (3) the step (2) The resulting soaked straw micropowder, urea, potassium sulfate, superphosphate, and potassium humate are added to a high-speed mixer in a certain proportion, mixed at a high speed for a period of time, and a uniformly dispersed composite material is obtained; the weights of the four substances are respectively Be: 100kg, 30kg, 20kg, 5kg, 15kg; (4) the composite material obtained in step (3...

Embodiment 3

[0033] A preparation method of biochar-based fertilizer, the specific preparation steps are as follows: (1) grind crop stalks into powder with a special grinder, and take straw micropowder with a particle diameter not exceeding 5 mm for use; (2) use the stalks obtained in step (1) Add straw micropowder and phosphoric acid into the kneader according to a certain ratio, set the kneader blade speed and kneading temperature, and obtain straw micropowder effectively soaked inside; wherein the weight of straw micropowder is 100kg, and the weight of phosphoric acid solution is 5kg; (3) the step (2) The resulting soaked straw micropowder, urea, potassium sulfate, superphosphate, and potassium humate are added to a high-speed mixer in a certain proportion, mixed at a high speed for a period of time, and a uniformly dispersed composite material is obtained; the weights of the four substances are respectively Be: 100kg, 20kg, 15kg, 5kg, 10kg; (4) the composite material obtained in step (3...

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Abstract

The invention discloses a novel biochar-base fertilizer preparation method, which is characterized in that straw carbonization temperature is reduced through phosphoric acid soaking, thermoplastic processability of straw is improved through addition of urea, and yield increasing performance is improved compared with single use of a compound fertilizer through addition of humic acid nutrition, so that the biochar base fertilizer with low pollution and low energy consumption is prepared; meanwhile, by applying the fertilizer, the utilization rate of the fertilizer can be increased, the application of the fertilizer is reduced, and the yield and quality of rice are improved.

Description

technical field [0001] The invention belongs to the field of biochar-based slow-release fertilizers, and relates to the preparation of biochar-based slow-release fertilizers and a preparation method thereof. Background technique [0002] Rice is a widely cultivated crop in my country. In 2018, the rice area in my country was 39.1 million hectares, but the NPK utilization rate of rice was 35%, 25%, and 41%, respectively, and the loss of nitrogen and phosphorus nutrients was serious; from the perspective of saving production costs and protecting the environment It is urgent to greatly increase the utilization rate of fertilizers; at the same time, rice stalks are generally used as organic fertilizers, which are prepared into organic fertilizers through fermentation, and the utilization rate is not high. [0003] Biochar is the product of thermal cracking of biomass raw materials. The main component is carbon molecules. Biochar has a good pore structure, so it can achieve a good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G3/80C05G5/12
CPCC05G3/40C05G3/80C05G5/12C05B1/02C05B17/00C05C9/00C05D1/02C05F11/00C05F11/02
Inventor 刘文政张鹏顾红艳刘玉华郑桂亮韩建华谢静王权刘春林张建民孙宇哲王春海孙士武李建权李志强刘强刘学慧
Owner 天津市优质农产品开发示范中心
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