Method for constructing plow layer soil on stony desertification ground surface by using heavy-metal polluted bottom mud

A technology that pollutes sediment and heavy metals. It is applied in the restoration of polluted soil, land preparation methods, agricultural machinery and tools, etc. It can solve the problems that affect a large amount of land, and achieve good production increase effect, good stabilization effect, and leachable components. Reduced effect

Active Publication Date: 2014-06-11
ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the texture of the dredged sediment is not adjusted, it cannot be used as a medium for plant growth, affecting its large-scale use in land.

Method used

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  • Method for constructing plow layer soil on stony desertification ground surface by using heavy-metal polluted bottom mud
  • Method for constructing plow layer soil on stony desertification ground surface by using heavy-metal polluted bottom mud
  • Method for constructing plow layer soil on stony desertification ground surface by using heavy-metal polluted bottom mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 The method of constructing plow layer soil on rocky desertification surface with heavy metal polluted bottom mud

[0038] In November 2012, in Xiasi Village, Xinpo Town, Longhua District, Haikou City, Hainan Province, the rocks on the surface of the rocky desertification land to be improved were broken to level the ground. The standard for crushing stones is that the particle size of the crushed stones is ≤5cm, and the standard for leveling the ground is that the slope ratio is ≤3:1000.

[0039] The river sand (particle size ≥ 0.02mm) from the river section of Xinpo Town, Nandu River, Haikou City was evenly spread on the rocky desertification land that had been leveled according to the design thickness of 35cm, and then the dredged Xinpo Township, Haikou City The bottom mud in a river pond in the town was naturally dehydrated and paved, and then dried and dehydrated naturally, and evenly spread on the river sand. The thickness of the bottom mud laying was 2...

Embodiment 2

[0046] Embodiment 2 The application of the plow layer soil obtained by the present invention on crop planting

[0047] On the plow layer soil obtained by the method of the present invention from the bottom mud in Example 1, water spinach (produced respectively from Thailand's Gundam Seed Co., Ltd. and Beijing Golden Land Agricultural Technology Research Institute) and dry crop edamame were planted according to conventional methods. At the same time, 0.3% lime + 0.3% calcium magnesium phosphate fertilizer was used as a stabilizer to stabilize the test plow layer soil, and the plow layer soil covered with unstabilized bottom mud was used as a comparison. Physiological indicators and growth indicators were recorded during crop growth, yield was recorded when harvested, and heavy metal content was detected for water spinach and edamame.

[0048] As a result, the physiological indicators and growth indicators of vegetables planted in the bottom mud after treatment are better than t...

Embodiment 3

[0053] Example 3 Application of the plow layer soil pH adjustment constructed by the present invention

[0054] In Example 1, the bottom mud was stabilized according to the present invention to construct the plow layer soil, and water spinach was planted according to the conventional method (produced respectively from Thailand's Gundam Seed Co., Ltd. and Beijing Golden Land Agricultural Technology Research Institute). At the same time, the plow layer soil with 0.3% lime + 0.3% calcium magnesium phosphate fertilizer as stabilizer and the soil with unstabilized bottom mud were used as a comparison. During the growth of crops, the pH changes of the soil in different growth periods are monitored.

[0055] Table 3 Changes of soil acidity and alkalinity (pH) in the plow layer before and after stabilization in different planting periods

[0056]

[0057] From the change data of soil pH in different planting periods in the field test, it can be seen that firstly, the mixture of se...

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Abstract

The invention discloses a method for constructing plow layer soil on a stony desertification ground surface by using heavy-metal polluted bottom mud. The method comprises the following steps: 1) crushing stones on the stony desertification ground surface to be regulated and flattening the ground; 2) uniformly laying river sand on the flatted ground; 3) laying the heavy-metal polluted bottom mud on the river sand; 4) spreading stabilizing agent on the heavy-metal polluted bottom mud; 5) performing rotary tillage for the first time; 6) performing dry and wet alternate treatment for 15 days, exposing under the blazing sun for 7 days and performing rotary tillage for the second time, wherein the rotary tillage direction is opposite to the rotary tillage direction at the first time; after the water content of the rotary tilled mixture of the bottom mud, the river sand and the stabilizing agent is naturally decreased to 25-30 percent, performing rotary tillage for the third time, wherein the rotary tillage direction is perpendicular to the rotary tillage direction at the second time; 7) after the rotary tillage for the third time, planting a crop of leguminous green manure, performing rotary tillage for a fourth time, returning the green manure into the field and obtaining the plow layer soil after 2 months. The plow layer soil obtained by adopting the method has a remarkable heavy-metal stabilizing effect and the heavy metal content of the planted vegetable crops meets the national standard.

Description

technical field [0001] The invention belongs to the field of land improvement engineering, and in particular relates to a method for constructing plow layer soil on rocky desertification surface with heavy metal polluted bottom mud. Background technique [0002] Land remediation is an activity to improve the efficiency of land use by renovating land that is inefficiently used, irrationally used, unused, and damaged by production and construction activities and natural disasters; important means of productivity. Among them, the requirements for the cultivated layer soil in the land improvement project are particularly high, that is, the quality of the cultivated land after the improvement is at least one level higher than the quality of the cultivated land before the improvement. The specific indicators are that the thickness of the remediation soil layer is more than 15-20cm, the nutrients are complete, the organic matter is rich, the aggregate structure is good, the soil e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02B09C1/00
Inventor 刘永兵李翔吴军巴特尔洪文良贾斌许杰峰程言君张建中张琼
Owner ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
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