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Straw organic fertilizer and preparation method thereof

A straw-based organic fertilizer, straw technology, applied in fertilization devices, fertilizer mixtures, applications and other directions, can solve the problems of inability to large-scale promotion and high cost, and achieve the effects of easy degradation of organic matter content, improved accessibility, and high organic matter content.

Inactive Publication Date: 2019-05-03
湖南慧谷农业生态研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are domestic useful chemical methods to pretreat straw for bioethanol production, but it cannot be popularized on a large scale because the cost is higher than that of grain ethanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) After crushing rice straw, pass through a 10-mesh sieve, add the sieved straw to a 1% sodium hydroxide solution at a mass ratio of 1:8, stir evenly, and heat at 100°C for 10 minutes to obtain pretreatment straw;

[0034] (2) Add humic acid raw powder into the pretreated straw obtained in step (1) according to the mass ratio of 1:20, stir evenly and heat to boiling to obtain mixture A; wherein, the heating time is 30 minutes;

[0035] (3) Calcium chloride is added to the mixture A obtained in step (2) until no precipitation occurs to obtain mixture B;

[0036] (4) Furfural slag is added to the mixture B obtained in step (3) in a mass ratio of 0.5:10, the pH is adjusted to 7, and the mixture C is obtained after drying; wherein, the drying temperature is 60° C., and the drying time is for 10h;

[0037] (5) Add potassium dihydrogen phosphate to the mixture C obtained in step (4) at a mass ratio of 1:10, and mix well to obtain straw organic fertilizer.

Embodiment 2

[0039] (1) Corn stalks are crushed and passed through a 50-mesh sieve, and the sieved stalks are added to a potassium hydroxide solution with a concentration of 2% at a mass ratio of 1:15, stirred evenly, and heated at 80°C for 5 minutes to obtain pretreatment straw;

[0040] (2) Add humic acid raw powder into the pretreated straw obtained in step (1) in a mass ratio of 1:6, stir evenly and heat to boiling to obtain mixture A; wherein, the heating time is 45 minutes;

[0041] (3) Calcium chloride is added to the mixture A obtained in step (2) until no precipitation occurs to obtain mixture B;

[0042] (4) Add furfural slag into the mixture B obtained in step (3) according to the mass ratio of 3:10, adjust the pH to 8, and obtain mixture C after drying; wherein, the drying temperature is 90°C, and the drying time is for 6h;

[0043] (5) Add potassium dihydrogen phosphate to the mixture C obtained in step (4) at a mass ratio of 1:10, and mix well to obtain straw organic fertil...

Embodiment 3

[0045] (1) Wheat straw is pulverized and passed through a 120-mesh sieve, and the sieved straw is added to a potassium hydroxide solution with a concentration of 5% at a mass ratio of 1:25, stirred evenly, and heated at 121°C for 1 min to obtain pretreatment straw;

[0046] (2) adding humic acid raw powder into the pretreated straw obtained in step (1) in a mass ratio of 1:10, stirring evenly and then heating to boiling to obtain mixture A; wherein, the heating time is 60 minutes;

[0047](3) Calcium chloride is added to the mixture A obtained in step (2) until no precipitation occurs to obtain mixture B;

[0048] (4) Add furfural slag to the mixture B obtained in step (3) according to the mass ratio of 1.5:10, adjust the pH to 8, and obtain mixture C after drying; wherein, the drying temperature is 80°C, and the drying time for 8h;

[0049] (5) Add potassium dihydrogen phosphate into the mixture C obtained in step (4) at a mass ratio of 2:10, and mix well to obtain straw or...

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PUM

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Abstract

The invention provides a straw organic fertilizer and a preparation method thereof. The preparation method mainly comprises the following steps: (1) crushing straw, then carrying out pretreatment under an alkali-heat condition, adding humic acid raw powder into the crushed straw, and carrying out heating to obtain a mixture A; (2) adding calcium chloride into the mixture A until no precipitate isgenerated to obtain a mixture B; (3) adding furfural residues into the mixture B, and carrying out uniform mixing and drying to obtain a mixture C; and (4) drying the mixture C at a high temperature,adding a certain amount of a compound fertilizer, and uniformly carrying out mixing to obtain the powdery organic fertilizer. According to the invention, the crop straw can be massively treated in a short time, and industrial and agricultural organic wastes are fully utilized to prepare the organic fertilizer which has a high organic matter content and is rich in various nutrient elements, so thata novel mode of straw returning is formed.

Description

technical field [0001] The invention relates to the technical field of agricultural waste, in particular to a straw organic fertilizer and a preparation method thereof. Background technique [0002] As a large agricultural country, my country produces about 700 million tons of crop straw every year. Crop straw is a very rich renewable resource. Straw is rich in organic matter and nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and other nutrients. It is also an important biomass resource and can be used as fertilizer, feed, fuel and Raw materials for industrial production, etc. However, at present, in addition to being used for papermaking, feed or feed raw materials, and returning to the field for fertilizer production, a large amount of crop straw is directly burned every year, which not only pollutes the environment but also produces waste. With the implementation of the national policy of prohibiting open-air burning of straw, a large amount of straw needs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
Inventor 文亚雄郭帅谭武贵谭石勇邱尧
Owner 湖南慧谷农业生态研究院有限公司
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