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Method for using edible mushroom residue hydrothermal carbonized product for improvement of saline-alkali soil

A technology of hydrothermal carbonization and edible fungus, which is applied in the direction of chemical instruments and methods, applications, fertilizer mixtures, etc., can solve the problems of air, soil, groundwater pollution, long improvement cycle of biological improvement methods, and high cost of engineering improvement methods. Influence, increase soil carbon sink, low cost effect

Inactive Publication Date: 2015-01-28
AGRI ECOLOGY INST FUJIAN ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many technical measures for saline-alkali soil improvement at home and abroad, such as engineering measures for washing salt and pressing salt, biological measures for planting salt-tolerant plants and green manure, chemical measures for adding improvers to reduce salt and alkali, etc., but engineering improvements The cost of the method is relatively high, the improvement period of the biological improvement method is long, and the effect is slow
[0003] On the other hand, in the process of agricultural product processing and production, a large amount of agricultural waste such as straw, bran, wheat bran, and edible fungus residue is produced. pollute and waste resources

Method used

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  • Method for using edible mushroom residue hydrothermal carbonized product for improvement of saline-alkali soil
  • Method for using edible mushroom residue hydrothermal carbonized product for improvement of saline-alkali soil

Examples

Experimental program
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Embodiment 1

[0017] 1) Raw material preparation: the mushroom residue of Pleurotus eryngii is prepared into a mixed liquid of edible fungus residue according to the ratio of material to water 1:4;

[0018] 2) Hydrothermal carbonization: CaO was added to the mixture of Pleurotus eryngii mushroom residue for 6 hours of hydrothermal carbonization, and the hydrothermal carbonization temperature was 200°C; the amount of CaO added was 2% of that of Pleurotus eryngii mushroom residue.

[0019] 3) Solid-liquid separation: After cooling the product obtained in step 2), solid-liquid separation is carried out to obtain Ca-containing 2+ solid biochar composite materials;

[0020] 4) Saline-alkali soil improvement: will contain Ca 2+ The biochar composite material is mixed with fertilizer or organic material and applied to alkaline soil, and the application amount accounts for 2% of the soil weight.

[0021] After 30 days of planting, the aboveground biomass of sweet potato with leaves increased by 4...

Embodiment 2～6

[0024] Table 1

[0025]

[0026] The pH value, yield of biochar in the product, and the pH value, organic carbon content, and soil soluble salt content of the soil before and after saline-alkali land improvement are shown in Table 2:

[0027] Table 2

[0028]

[0029] As can be seen from Table 2, the yield of biochar produced by hydrothermal carbonization of edible fungus slag and CaO according to the method of the present invention is higher than that obtained by hydrothermal carbonization without adding CaO. Neutralization lowers the pH of saline-alkaline soils while utilizing Ca in the product 2+ The harmful sodium in the soil is replaced by ion exchange, which reduces the salinity of the soil and has a significant improvement effect.

[0030] The raw materials in the above examples are not limited to Pleurotus eryngii and Pleurotus eryngii mushroom residues, all kinds of edible fungus residues are acceptable; the ratio of edible mushroom residues to water is prefer...

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Abstract

The invention discloses a method for using an edible mushroom residue hydrothermal carbonized product for improvement of saline-alkali soil, and the method comprises 1) raw material preparation, to be more specific, edible mushroom residue is prepared into an edible mushroom residue mixture in the ratio of material to water of 1:4 to 1:9; 2) hydrothermal carbonization, to be more specific, CaO is added into the edible mushroom residue mixture for hydrothermal carbonization for 6-12 hours, the hydrothermal carbonization temperature is 200 to 250 DEG C; the CaO addition amount is less than 2% of the edible mushroom residue amount; 3) solid-liquid separation and 4) saline alkali soil improvement and other steps. According to the method, by common reaction of the CaO and the edible mushroom residue, the acid buffer capacity of biological carbon can be improved by lime effect of the CaO; a large number of Ca<2+> produced by hydrothermal carbonization can substitute harmful sodium (Na < +>) ion in soil by ion substitution, by combining irrigation for leaching, soil salinity degree is reduce; and biological carbon composite material containing the Ca<2+> is acidic, and can quickly neutralize alkalinity of the saline alkali soil.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement, in particular to a method for improving saline-alkali soil by using hydrothermal carbonization products of edible fungus residues. Background technique [0002] Saline-alkali soil is an important land resource in the world, and it is widely distributed, with a total global area of ​​about 1 billion hm 2 , accounting for about 10% of the land area. The total area of ​​saline soil in my country is about 36 million hm 2 , accounting for 4.88% of the country's usable land area. In recent years, due to artificial irrational irrigation, excessive use of chemical fertilizers, deforestation, destruction of vegetation, and climate warming caused by the greenhouse effect, the problem of soil salinization has become increasingly serious. It is estimated that the saline-alkali soil in the world is 0.1-0.15 million hm per year 2 speed growth. With the increase of world population a...

Claims

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Application Information

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IPC IPC(8): C09K17/06C09K109/00
CPCC09K17/06C09K2109/00
Inventor 王义祥叶菁翁伯琦黄毅斌李艳春王成己
Owner AGRI ECOLOGY INST FUJIAN ACADEMY OF AGRI SCI
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