Method for remedying facility continuous cropping acidized soil through microorganism-electric combination

A combined restoration and electric restoration technology, applied in the field of soil restoration, can solve problems such as unreported application, soil compaction, and imbalance of soil nutrient elements, and achieve the effect of improving soil quality, simple operation, and easy access

Active Publication Date: 2016-02-03
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applying lime can directly neutralize soil acidity, but long-term or large-scale use of lime will cause soil compaction and imbalance of soil nutrient elements
Microbial amendments can activate soil nutrients, promote the release of nutrient ions, increase soil organic matter and minerals, improve soil buffer performance, and then improve soil acidity and alkalinity, but it often takes several years to see results
Electric remediation is currently mainly used in the remediation of heavy metal-contaminated soil, such as the patent "Electric Remediation Method and Device for Heavy Metal Contaminated Soil (CN103736718A)", but there is no report on the application of facility continuous cropping acidified soil

Method used

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  • Method for remedying facility continuous cropping acidized soil through microorganism-electric combination

Examples

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Effect test

Embodiment 1

[0032] Example 1 Laboratory Simulated Microbe-Electric Combined Repair Facility Continuous Cropping Acidified Soil

[0033] The EM bacteria used were purchased from Amule Environmental Biotechnology (Nanjing) Co., Ltd., which contains more than 80 effective active microorganisms such as photosynthetic bacteria, lactic acid bacteria, and yeasts. The number of viable bacteria is ≥100 million / ml, pH≥3.8, and the color is Yellowish-brown, translucent liquid with a strong sour or sour smell.

[0034] Molasses was purchased from Amuler Environmental Biotechnology (Nanjing) Co., Ltd.

[0035] Add 1mLEM bacterial solution to 8mL molasses, 8mL water, 0.1mL5g / L Ca(OH) 2 solution, 0.15mL3g / L of Mg(OH) 2 solution, fermented at 25°C for 36 hours, and the bacterial concentration reached 10 9 / mL to obtain the fermentation broth.

[0036] Fermentation broth: water: 5g / LCa(OH) 2 Solution: 3g / LMg(OH) 2 The solution is compounded according to the volume ratio of 1:9:0.5:0.2 as the functio...

Embodiment 2

[0045] Example 2 Field Application of Microbe-Electric Combined Restoration Facility Continuous Cropping Acidified Soil

[0046] Adopt the culture in embodiment 1 to obtain the functional microbial bacterial liquid. Electrokinetic remediation was performed on the acidified soil of the continuous cropping vegetable base in Gaochun District, Nanjing. The pH of the soil was 4.71, and the EC value of the 0-30cm soil was 1380us / cm (total salt concentration 4.13g). Set two 0.03m wide, 0.3m deep, and 0.8m long grooves on the soil surface of the electrodynamic repair area at an interval of 25cm as electrode grooves, and insert the positive and negative electrodes respectively. separated by the filter. Add 1L of Ca(OH) with a concentration of 0.02M into the tank 2 solution and 1 L of Mg(OH) at a concentration of 0.005M 2 solution, adjust the pH in the tank to 11.8, and the current density of electrokinetic repair is 2.0mA / cm 2 (relative to the contact area between the soil and the ...

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Abstract

The invention discloses a method for remedying facility continuous cropping acidized soil through microorganism-electric combination. The method includes the steps that two electrode baths are formed in the surface of the soil, a cathode and an anode are inserted in the electrode bathes respectively, alkali liquor is added to the baths, the pH value in the baths ranges from 11 to 12, and power is supplied for electric remediation; microorganisms ferment, fermentation liquid is acquired to be compounded with Ca(OH)2 and Mg(OH)2 to serve as functional microorganism bacterial liquid; the functional microorganism bacterial liquid is inoculated into the soil anode bath in the electric remediation process, and the pH value is adjusted to an initial value; and under the effects of functional microorganisms and electric power, acid-based ions in the soil are separated from the soil and migrated to the anode and the cathode, and therefore soil remediation is finished. The microorganisms are used for acting on the soil, and soil nutrient ions are activated; an electric remediation method is used for removing redundant NO3- and K+ in the soil, the content of base-based ions such as OH-, Ca2+ and Mg2+ in the soil is increased, and finally the pH value of the facility continuous cropping acidized soil is increased. The method is easy to implement, secondary pollution cannot be generated, and the microorganism activity of the soil and the quality of the soil can be improved.

Description

technical field [0001] The invention relates to soil restoration technology, in particular to a method for continuous cropping and acidifying soil of a microbial-electric combined restoration facility. Background technique [0002] In my country, due to the excessive application of chemical acidic fertilizers such as N fertilizer, the problem of soil acidification in facility continuous cropping has become increasingly prominent, resulting in a decrease in vegetable yield and quality deterioration, which seriously restricts the sustainable use of facility soil. How to solve the problem of soil acidification in facility continuous cropping has become a problem of great concern to the current society. Research at home and abroad shows that the pH value of facility continuous cropping soil shows a downward trend year by year with the increase of facility planting years, and greenhouses with soil pH<6.5 account for more than 70% of the total number of investigations, and some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/085B09C1/10
Inventor 常婷婷邵孝侯叶欢秦恒基陈立华张展羽杨绪崔雪松
Owner HOHAI UNIV
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