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Saline-alkali soil remediation method

A remediation method and soil remediation technology, applied in the field of contaminated soil remediation, can solve the problems of harmful plants, poor mobility of pollutants, and high salt content, and achieve the effects of increasing cadmium content and reducing heavy metal pollution

Active Publication Date: 2019-05-17
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with ordinary saline-alkali land, the improvement and treatment of heavy metal-polluted saline-alkali land is more difficult. First, pollutants have poor mobility in the soil, long residence time, cannot be naturally degraded, diluted, and flow, and will become more and more enriched in saline-alkali land as time goes on. , harmful to plants grown in saline-alkali land; second, due to the high salt content and alkaline nature, the survival rate of plants is very low, so the effect of natural improvement is extremely slow
[0004] At present, there is no effective restoration method for saline-alkali soil, which can effectively restore saline-alkali soil

Method used

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preparation example Construction

[0035] The method for preparing decomposed livestock and poultry excrement of the present invention preferably comprises mixing livestock and poultry excrement, urea, superphosphate and a premix to obtain a mixture, adjusting the moisture content of the mixture to 45% to 55%, stirring evenly, and then fermenting for 21-21. 28d; the premix includes 0.5-1.5 parts of quick-rot agent, 15-20 parts of bran and 25-30 parts of corn flour. Said mixing in the present invention is preferably to scatter urea, superphosphate and premix into livestock and poultry manure. Before sprinkling the urea, superphosphate and premixed material, the present invention preferably further includes stacking the livestock and poultry manure into long strips to obtain the stock of livestock and poultry manure. The added amount of the urea in the present invention is preferably 0.08-0.12%, more preferably 0.1%, of the livestock and poultry manure stockpiles in parts by weight. The amount of calcium superph...

Embodiment 1

[0051] Taking the intercropping of quinoa and turnip in heavy metal-polluted saline-alkali land in Binhai New Area, Tianjin as an example, the method of planting litter and turnip in coastal saline-alkali land to repair heavy metal-polluted saline-alkali soil is explained.

[0052] The soil in the test area is salinized wet-aquic soil. The basic properties of the soil before improvement are 1.97g / kg total salt, 7.86 soil pH, 9.5g / kg organic matter, 82.5mg / kg alkaline nitrogen, and 82.5mg / kg available phosphorus. The content is 8.63mg / kg, and the soil cadmium content is 2.56mg / kg.

[0053] The tested crops were quinoa and quince, and the seeds were provided by Jiangsu Yancheng Lvyuan Saline Soil Agricultural Technology Co., Ltd.

[0054] The field test is divided into four areas: test area 1, test area 2, test area 3 and test area 4, each area is 3.0m×5.0m.

[0055] Among them, the experimental area 1 is the treatment of heavy metal polluted saline-alkali soil without applicat...

Embodiment 2

[0086] Taking the intercropping of quinoa and turnip in heavy metal-polluted saline-alkali land in Binhai New Area, Tianjin as an example, the method of planting litter and turnip in coastal saline-alkali land to repair heavy metal-polluted saline-alkali soil is explained.

[0087] The tested crops were quinoa and quince, and the seeds were provided by Jiangsu Yancheng Lvyuan Saline Soil Agricultural Technology Co., Ltd.

[0088] The field test is divided into four divisions, namely the first test area, the second test area, the third test area and the fourth test area, each with an area of ​​3.0m×5.0m.

[0089] Among them, the experimental area 1 is the treatment of heavy metal polluted saline-alkali soil without application of amendments and without application of Trichoderma viridans. When Aquaba is single-cropped, the plant-to-plant distance is 30cm, the row-to-row distance is 50cm, and 4 rows are planted in total; when the seaweed is single-cropped, the row-to-plant dista...

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Abstract

The invention provides a saline-alkali soil remediation method and belongs to the field of remediation of polluted soil. The method comprises the following steps: 1) applying an improver into the saline-alkali soil in winter, spraying bamboo vinegar liquid and ploughing, wherein the mass of the bamboo vinegar liquid is 0.5-1% of the mass of the improver, and effective components of the improver comprise phosphogypsum, calcium superphosphate and rotten livestock excrement; and 2) applying a trichoderma virens microbial agent to the ploughed soil in spring and planting atriplex halimus and sesbania in an intercropping manner. Through the application of the advantage complementation effect of a symbiotic system formed by intercropping the atriplex halimus and the sesbania, the improvement effect of the improver and the growth promoting effect of trichoderma virens, the method provided by the invention is capable of accelerating mutual yield increase of the atriplex halimus and the sesbania and improving the remediation efficiency of plants on the saline-alkali soil.

Description

technical field [0001] The invention belongs to the field of remediation of polluted soil, and in particular relates to a soil remediation method in saline-alkali land. Background technique [0002] Soil salinization and secondary salinization have become one of the main ecological and environmental problems to be solved urgently in arid and semi-arid areas of our country. Soil salinization can lead to land degradation, weaken and destroy land productivity, and reduce crop yield. It is the main obstacle restricting agricultural development in arid areas, and scientific and reasonable methods should be adopted to solve it. In addition, the increasing human activities have continuously released heavy metals such as cadmium, lead, zinc and chromium into the environment, causing great impact and damage to the soil environment and ecosystem. Heavy metal pollution has increasingly become a potential risk of saline-alkali ecosystem. Therefore, the remediation of saline-alkali soil...

Claims

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Application Information

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IPC IPC(8): B09C1/10B09C1/00C05G3/04C05F17/00C05G3/80
CPCY02W30/40
Inventor 宋宁宁
Owner QINGDAO AGRI UNIV
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