A kind of acidic soil improver and its preparation method and the method for improving acidic soil

A technology of acidic soil and improver, which is applied in the field of acidic soil improvement, acidic soil improver and its preparation, which can solve the problems of inability to adjust ion composition and slow improvement effect

Active Publication Date: 2020-10-30
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, adding lime and organic fertilizers is a common means of acid soil improvement, but lime application can only improve soil acidity and increase Ca ion content, and cannot adjust the ion composition of the soil, while organic fertilizers often improve the effect Slower effect
[0006] Therefore, there are problems of improving soda saline-alkali land and acidic soil simultaneously in the prior art, and there are also deficiencies in the improvement of acidic soil

Method used

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  • A kind of acidic soil improver and its preparation method and the method for improving acidic soil
  • A kind of acidic soil improver and its preparation method and the method for improving acidic soil
  • A kind of acidic soil improver and its preparation method and the method for improving acidic soil

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In the spring, the surface polysaline soil (the surface layer from the surface to the depth of 5mm, with a salt content of 3% and a pH value of 8.7) was taken from the soda saline-alkali land in Daan, Jilin, and the Suaeda salsa grown in the soda saline-alkali land was air-dried and then prepared in a carbonization furnace at 300°C. To obtain halophyte charcoal, lime powder is obtained by crushing lime purchased in the market. Mix surface polysaline soil, halophyte charcoal, and lime powder in a ratio of 50:30:20, and pass through a 3mm sieve to obtain an acidic soil conditioner. The apparent density of the prepared acidic soil conditioner is 0.86g / cm 3 , pH value is 8.7.

[0041] According to the application rate of 200kg / mu mixed with acidic soil, the indoor simulation experiment was carried out. The acidic soil used is the acidic soil from the surface of the agricultural greenhouse to the depth of 20cm, the pH value is 4.55, and the exchangeable acidity is 2.4cmol / ...

Embodiment 2

[0046]In the spring, the surface polysaline soil (the surface layer from the surface to the depth of 5mm, with a salt content of 5%, and a pH value of 8.8) was taken from the soda saline-alkali land in Daan, Jilin, and the Suaeda salsa grown in the soda saline-alkali land was air-dried and then prepared in a carbonization furnace at 400°C. To obtain halophyte charcoal, lime powder is obtained by crushing lime purchased in the market. Mix surface polysaline soil, halophyte charcoal, and lime powder in a ratio of 60:25:15, and pass through a 3mm sieve to prepare an acidic soil conditioner. The apparent density of the prepared acidic soil conditioner is 0.89g / cm 3 , pH value is 8.9.

[0047] According to the application rate of 250kg / mu mixed with acidic soil, the indoor simulation experiment was carried out. The acidic soil used is the acidic soil from the surface of the agricultural greenhouse to the depth of 20cm, the pH value is 4.55, and the exchangeable acidity is 2.4cmol...

Embodiment 3

[0052] In the spring, the surface polysaline soil (the surface layer from the surface to the depth of 5mm, with a salt content of 10% and a pH value of 9.1) was taken from the soda saline-alkali soil in Da'an, Jilin. To obtain halophyte charcoal, lime powder is obtained by crushing lime purchased in the market. The surface polymer saline soil, halophyte charcoal, and lime powder are mixed according to the ratio of 70:20:10, and passed through a 3mm sieve to obtain an acidic soil conditioner. The apparent density of the prepared acidic soil conditioner is 0.92g / cm 3 , pH value is 9.1.

[0053] According to the application rate of 300kg / mu mixed with acidic soil, the indoor simulation experiment was carried out. The acidic soil used is red soil from the surface of Changsha to a depth of 20cm, with a pH value of 5.46 and an exchangeable acidity of 4.6cmol / kg; the soil water content was controlled at 60-80% of the field water capacity during the experiment.

[0054] Soil sample...

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Abstract

The invention relates to an acidic soil improver, which comprises the following components in terms of weight percentage: (1) 50%-70% soda saline-alkali surface polysaline soil, and the soda saline-alkali surface polysaline soil is the inland soda saline-alkali surface Surface soil to a depth of 5 mm, with a salt content of 3%-30%, and a pH value of 8.5-10.0; (2) 20%-30% halophyte charcoal, which is air-dried salt (3) 10%-20% lime powder. The invention combines the problem of soil acidification with the improvement and management of soda-type saline-alkali land and the utilization of halophyte resources. It is an acidic soil improver with good effect, in order to better improve the acidic soil in the southern region and the acidic soil produced in the operation of greenhouses in various places.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to an acidic soil improver and a preparation method thereof, and a method for improving acidic soil by using the acidic soil improver. Background technique [0002] Since the 1980s, many unfavorable factors such as excessive application of nitrogen fertilizers in the process of high-input intensive agricultural production, removal of straw and salt base have caused significant acidification of the main farmland soil in my country. Studies have shown that the pH value of some red soils in the south has dropped to between 3-4, resulting in a large reduction or even failure of crops such as corn and tobacco; the soil pH value of some vegetable greenhouses in the north has dropped from 7-8 to 4-5, and pests and diseases have appeared. Seriously, the quality and yield of vegetables have dropped significantly. [0003] On the other hand, the soda-saline soil in the inland soda saline-alka...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/00C05G3/80C09K109/00
CPCC09K17/00C05D1/00C09K2109/00C05G3/80
Inventor 郭洋楠潘金王义李强张德晶包玉英
Owner CHINA SHENHUA ENERGY CO LTD
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