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Preparation method of acidic soil microenvironment modifier

An acid soil and microenvironment technology, applied in the field of preparation of soil amendments, can solve the problems of inability to meet the needs of acid soil improvement, time-consuming agricultural measures and biological methods, and chemical methods that consume a lot of manpower and material resources, so as to reduce leaching losses. , the effect of improving soil microenvironment and large market potential

Active Publication Date: 2015-08-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the acidic soil improvement methods mainly include air pollution control, agricultural measures (crop rotation, interplanting, etc.), biological methods (biological acid removal), chemical methods (improving agents: lime, industrial waste; combined use of organic-inorganic fertilizers, etc.), etc. Although these measures are effective under certain conditions, they each have their own limitations: air pollution control cycle is long and costly, agricultural measures and biological methods take a long time and are limited by climatic conditions, chemical methods consume a lot of manpower and material resources and improvers large amount
These methods are difficult to implement on a large scale and cannot meet the current needs of acidic soil improvement in my country.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of an acidic soil microenvironment modifier disclosed in this embodiment comprises the following steps:

[0018] (1) Add attapulgite powder (colloidal grade, 200 mesh) into a beaker with 0.5L tap water to make a 10g / L suspension, then stir at 80 degrees Celsius at high speed (5000rpm) for 30 minutes, and statically After leaving for 5 minutes, discard the suspension (0.1 L) containing more impurities at the bottom of the beaker. The purity of the remaining suspension attapulgite is more than 80%, and the remaining suspension is the first suspension.

[0019] (2) To the first suspension, add NaOH (1g / L), KOH (0.5g / L), Ca(OH) 2 (2g / L), then stirred (50rpm) at 50 degrees Celsius for 40 minutes to obtain the second suspension, and completed the alkalization (sodiumization, potassiumization and calcification) modification of attapulgite.

[0020] (3) Add sodium humate (1g / L) to the second suspension, stir (50rpm) at 40 degrees Celsius for 20 minutes, an...

Embodiment 2

[0029] A preparation method of an acidic soil microenvironment modifier disclosed in this embodiment comprises the following steps:

[0030] (1) Add attapulgite powder (colloidal grade, 500 mesh) into a beaker with 1L tap water to make a 20g / L suspension, then stir at 100 degrees Celsius at high speed (10000rpm) for 50 minutes, and let it stand After 10 minutes, the suspension (0.2 L) containing more impurities at the bottom of the beaker was discarded. The purity of the remaining suspension attapulgite was more than 80%, and the remaining suspension was the first suspension.

[0031] (2) To the first suspension, add NaOH (3g / L), KOH (1g / L), Ca(OH) 2 (4g / L), then stirred (100rpm) at 80 degrees Celsius for 80 minutes to obtain the second suspension, and completed the alkalization (sodiumization, potassiumization and calcification) modification treatment of attapulgite.

[0032] (3) Add sodium humate (2g / L) to the second suspension, stir (100rpm) at 60 degrees Celsius for 30 mi...

Embodiment 3

[0040] A preparation method of an acidic soil microenvironment modifier disclosed in this embodiment comprises the following steps:

[0041] (1) Add attapulgite powder (colloidal grade, 300 mesh) into a beaker with 0.8L tap water to make a 15g / L suspension, then stir at 90 degrees Celsius at a high speed (8000rpm) for 40 minutes, statically After leaving for 8 minutes, discard the suspension (0.15 L) containing more impurities at the bottom of the beaker. The purity of the remaining suspension attapulgite is more than 80%, and the remaining suspension is the first suspension.

[0042] (2) To the first suspension, add NaOH (2g / L), KOH (0.7g / L), Ca(OH) 2 (3g / L), then stirred (80rpm) at 70 degrees Celsius for 60 minutes to obtain the second suspension, and completed the alkalization (sodiumization, potassiumization and calcification) modification of attapulgite.

[0043](3) Add sodium humate (1.5g / L) to the second suspension, after stirring (70rpm) at 50 degrees Celsius for 25 m...

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Abstract

The invention discloses a preparation method of an acidic soil microenvironment modifier. The method comprises the following steps: adding attapulgite ore powder into tap water, and stirring to obtain a first suspension; adding NaOH, KOH and Ca(OH)2 into the first suspension to obtain a second suspension; adding sodium humate to the second suspension, irradiating by using high energy electron beams to obtain humic acid-alkalized attapulgite; and uniformly mixing the humic acid-alkalized attapulgite with rice husk ash to obtain the modifier. The modifier can form a micro-nano network between a plow layer and deep soil, reduces the leaching loss of base cations in the plow layer through chelating, coordination, adsorption, hydrogen bond, electrostatic attraction and other effects, inhibits the reduction of the base saturation percentage of soil, alleviates soil acidification, improves the microenvironment of root micro-area soil, promotes root growth and improves the acid resistance of crops in order to increase the emergence rate and improve the output; and the method has the advantages of small use amount, low cost, environmentally friendly raw materials, and high efficiency.

Description

technical field [0001] The invention relates to a preparation method of a soil improver, in particular to a preparation method of an acidic soil microenvironment improver. Background technique [0002] There are about 200 million mu of acidified soil in my country, mainly distributed in the south and southeast of China. The main reasons for its formation are: (1) natural acidification; (2) dry and wet air deposition; (3) unreasonable fertilization. Soil acidification has become one of the main obstacles restricting my country's agricultural development, directly affecting my country's agricultural production capacity and food security. Therefore, the improvement and development of acidic soil plays an important role in promoting the sustainable development of agriculture and ensuring food security. At present, the acidic soil improvement methods mainly include air pollution control, agricultural measures (crop rotation, interplanting, etc.), biological methods (biological a...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K109/00
Inventor 蔡冬清吴正岩张欣王冬芳贺璐璐吴丽芳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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