CN106216371A - Nano material and with the application in rehabilitating soil cadmium pollution of plant and microbial association and method - Google Patents
Nano material and with the application in rehabilitating soil cadmium pollution of plant and microbial association and method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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Abstract
The invention provides a kind of method repairing vegetable soil cadmium pollution, employing includes that soil weighs the nano zeolite of 0.5% ~ 1.0%, by the nano-sized magnesium hydroxide of 0.1% ~ 0.5% land for growing field crops fertilizer amount, by spreading fertilizer over the fields, ditch spread, spread manuer in holes, fully mix with soil, depth of turning soil 15 20 cm, after balancing 57 days, transplant vegetable or other crop.The present invention by multiple recovery techniques such as in-situ passivation, phytoremediation and microorganism remediation the most altogether, utilizes cooperative effect rehabilitating soil Cd effectively to pollute.
Description
Technical field
The invention belongs to heavy metal pollution of soil recovery technique field, utilize nano material repairing soil particularly to one
Application in earth cadmium pollution, further relates to the method that nano material is repaired with plant, microbial association.
Background technology
Heavy metal pollution is in current soil pollution, one of environmental problem that contaminated area is the widest, harm is maximum, heavy metal
Pollutant can not be decomposed by soil microorganism after entering soil, easily accumulates in soil, thus absorbed by crops, causes agricultural production
The generation of quality safety problem, and then harm human health.Show according to investigations, China 24 province (city) outskirts of a town, sewage irrigations
In the economic development such as canal, industrial and mineral 329 emphasis contaminated areas, area rapidly, polluting the land for growing field crops crop acreage exceeded standard is 60
Ten thousand hm2, accounting for the 20% of the monitoring and surveying gross area, the agricultural output that wherein content of beary metal exceeds standard and area account for pollutant and surpass
Mark agricultural product total amount and more than the 80% of the gross area.According to correlation study report display (after 2000), Cd element be current I
The essential element that state's Heavy Metal Pollution In Cultivated Land is the most serious, it pollutes probability of happening is 25.20%.Investigation according to 2002 shows
Showing, the Cd average about content in vegetable is 0.167mg/kg, has exceeded relevant national standard (0.05mg/kg), is already belonging to tight
Heavily exceed standard.In 17, Chongqing City of the survey data display commodity grain base soil of 2008, the average content of Cd is about 0.390mg/
Kg, has exceeded relevant national standard (0.3mg/kg)；Cd in data display each big vegetables base, Chongqing soil of 2013
Average content is about 1.363mg/kg, and wherein in vegetable, Cd average content is 4.527mg/kg.Visible, Cd in soil and vegetable
Content presents the most quickly increases trend.Its reason is probably the discharge of " three wastes ", and mud dirt filling, municipal refuse etc. make
Cd Pollution in Soil increases the weight of increasingly.Owing to the heavy metal of excess is easily accumulated and entered by food chain in each tissue site of plant
Human body, causes serious harm to human health.Therefore, repairing heavy metal in soil pollutes oneself becomes environmental problem urgently to be resolved hurrily.
The recovery technique of cadmium pollution soil mainly has peripheral doses, chemical redemption, engineering reparation, biological restoration and life at present
State reparation etc..In practice, the various repairing and treating technology of Cadmium Pollution in Soils, it is required for inevitably solving how to break through
Reduce rehabilitation cost and improve remediation efficiency problem, meanwhile, also to accept how to avoid the test of secondary pollution environmental risk.Former
Position passivation recovery technique with advantages such as its investment little, the cycle is short, instant effect, easy enforcements it is considered to be the cadmium of a kind of economical and efficient
Contaminated soil remediation technology.
It is critical only that of in-situ passivation recovery technique selects suitable renovation agent.The most conventional renovation agent mainly has biology
Charcoal, zeolite, Calx, bentonite, meerschaum, phosphoric acid salt, hydroxide, red mud, slag, flyash, fertilizer etc..Hydroxide
Magnesium and pb in soil2+、Cd2+And Hg2+Form hydroxide etc. heavy metal, make bioavailability of heavy metals reduce, reduce crop pair
The absorption of heavy metal.Natural zeolite is a kind of hydrous alumino silicates mineral (Mn/2·Al2O3·xSiO2·yH2O), typically by three
Dimension silicon (aluminum) oxygen screen work composition, silicon (aluminum) oxygen tetrahedron is the most basic cellular construction of zeolitic frameworks, silicon (aluminum) oxygen tetrahedron structure
The three dimensions rack-like having become infinite expanding constructs.There is stronger ion-exchange capacity, the strongest absorbability, extensively should
For water body and soil pb2+、Cd2+And Hg2+Etc. heavy metal reparation.But in natural zeolite duct easily by hydrone and other from
The Na that sub-radius size is different+、K+、Ca2+And Mg2+Plasma occupies, and easily causes zeolite cavity blocking, makes duct not smooth,
Have impact on ion-exchange capacity and the surface adsorption ability of zeolite.
Since nineteen eighty-three American scientist Chaney etc. proposes to use plant to remove heavy metal in soil pollutant first
Since imagination (i.e. phytoremediation), the research emphasis of Heavy Metal Pollution Control has gradually been turned to phytoremediation technology by people.
Either in-situ passivation technology, plant and, microorganism remediation technology, all there is limitation in the effect being used alone.
Such as heavy metal accumulation plant, although especially hyperaccumulative plant can absorb water solublity and slightly solubility heavy metal, but the speed of growth is relatively
Slowly, Biomass is less, therefore, repairs speed slower.Additionally, the effect of phytoremediation also by soil types, temperature, humidity,
The restriction of the environmental conditions such as nutrition.Utilize AMF single rehabilitating soil Cd pollute due to its activity with temperature, oxygen,
The change of the environmental condition such as moisture, pH is relevant and makes microorganism remediation technology be affected relatively greatly by various environmental factorss, makes
Obtain this technology to be difficult to control.And in-situ passivation recovery technique, only changing heavy metal occurrence patterns in soil, total amount does not has
Change.The change of soil pH, Eh etc. can cause by the release again of fixing metal, causes reactivating of heavy metal to be inhaled with crop
Receive.
Summary of the invention
It is an object of the invention to provide nano material application in rehabilitating soil cadmium pollution, also provide for nanometer material simultaneously
The method of the combine d bioremediation Cd Pollution in Soils such as material in-situ passivation reparation, plant extract and microorganism remediation, promotes vegetable growth, increases
Strong vegetable resistance, improves yield of vegetables, improves quality of vegetable.
The purpose of the present invention is realized by following measures:
A kind of method repairing vegetable soil cadmium pollution, use include soil weigh 0.5%～1.0% nano zeolite, by
The nano-sized magnesium hydroxide of 0.1%～0.5% land for growing field crops fertilizer amount, by spreading fertilizer over the fields, ditch spread, spreads manuer in holes, fully mixes with soil, dig
Degree of depth 15-20cm, after balancing 5-7 days, transplants vegetable or other crop.
Nano material used by the present invention, has bigger external surface area, has more prominent surface nature, bigger ion
Exchange capacity, has the superiority that common passivator cannot be equal in terms of heavy metal reparation.
Described nano zeolite and nano-sized magnesium hydroxide particle diameter≤100nm.
Preferably, the method for above-mentioned reparation vegetable soil cadmium pollution, also include catch cropping rye grass and clump branch fungus, rye grass
And the amount ratio between AMF is 8: 9, wherein the unit of rye grass is grain, and mycorhiza unit is gram.Soil regards its cadmium
Pollution level selects rye grass and the consumption of mycorhiza.
Further, the method for above-mentioned reparation vegetable soil cadmium pollution, it is additionally included in after crop is transplanted 15 days and sterilizing is urged
Rye grass after bud is uniformly sowed in plant surrounding.In cadmium concentration is 1～10mg/kg contaminated soil, dissipate around every strain crop
Broadcast 20～40 rye grasses.
The method of above-mentioned reparation vegetable soil cadmium pollution, be included in crop transplant after 15 days or rye grass SANYE wholeheartedly time,
Arbuscular Mycorrhizal Fungi near its root.Described AMF includes ball in Glomus mosseae, Glomus etunicatum, root
One or more during capsule is mould, are wherein preferred with 1: 1: 1 weight proportion with Glomus mosseae, Glomus etunicatum, Glomus intraradices,
Plant in surrounding plant roots.When Cadmium in Soil concentration is 1～10mg/kg, arbuscular mycorrhiza consumption is 45g.
The present invention has stronger cation exchange capacity (CEC) and heavy metal adsorption, contributes to crop and has a stronger huge sum of money
Belong to toleration.At the same time it can also be by chelation, fixing effect and the cysteine of mycoprotein part and heavy metal shape
Become complex to make heavy metal be trapped in root, thus reduce plant above ground portion heavy metal concentration, improve plant heavy metal unit
The resistance that element is poisoned.
The method of above-mentioned reparation vegetable soil cadmium pollution, comprises the following steps:
(1) ground Cd Pollution in Soil situation it is repaired: gather the contaminated soil sample determination heavy metal Cd needing to carry out repairing
Concentration range, thus formulate concrete reclamation activities；
(2) every mu of ground is executed soil and is weighed the nano zeolite of 0.1%～0.5% and by 0.05%～0.1% land for growing field crops fertilizer amount
Nano-sized magnesium hydroxide, spread fertilizer over the fields uniformly, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fill with soil
Divide mixing, depth of turning soil 15～20cm, after balancing 5～7 days, transplant vegetable or other crop；
(3) rye grass after sterilizing accelerating germination is uniformly sowed in crop plant surrounding, at soil after crop is transplanted 15 days
When cadmium concentration is 1～10mg/kg, rye grass consumption is 20～40；
(4) crop transplant after 15 days or rye grass SANYE wholeheartedly time, Arbuscular Mycorrhizal Fungi near plant root,
Described AMF is the Glomus mosseae with 1: 1: 1 weight proportion, Glomus etunicatum, Glomus intraradices, at Cadmium in Soil
When concentration is 1～10mg/kg, the total consumption of arbuscular mycorrhiza is 45g.
The present invention utilizes nano zeolite and nano-sized magnesium hydroxide to reduce soil pH, adds soil CEC, changes cadmium at soil
Chemical form in earth and occurrence patterns so that it is be changed into stable state by activated state, reduce cadmium animal migration in the environment and life
Thing utilizability, significantly reduces effective cadmium content of soil and vegetable cadmium content, reduces the vegetable absorption and accumulation to cadmium；Alkalescence is received
Rice zeolite and nano-sized magnesium hydroxide can also improve acid ground, strengthen vegetable disease-resistant, ferrum needed for its plant growing contained,
The trace element such as magnesium, calcium, silicon, can promote vegetable increase production, improve quality of vegetable.Meanwhile, using rye grass catch cropping, rye grass inoculates
Clump branch fungus forms homobium in soil, and to heavy metal-polluted soil, especially cadmium, lead, zinc etc., have stronger enrichment,
The absorption of heavy metal can be realized, accumulate, shift, be burned the recovery that also can realize heavy metal by the later stage；Also by affecting root
The secretory activities of system etc. promote the growth of plant, increase disease resistance of plant.When rye grass and industrial crops catch cropping, can't be with warp
Ji crop competition illumination, nutrition and affect the growth of industrial crops.
The multiple recovery technique such as in-situ passivation, phytoremediation and microorganism remediation is organically combined by the present invention, logical
Cross in cadmium pollution soil add nano zeolite and nano-sized magnesium hydroxide etc. passivation renovation agent, by improve absorption fixation with
And improve soil pH value and cation exchange capacity (CEC), change cadmium existing forms in soil, reduce the biologically effective of Cadmium in Soil
Property and crop to Cd uptake, meanwhile, with phytoremediation, microorganism remediation for auxiliary, utilize rye grass, clump branch fungus to soil weight
The enrichment that cadmium metal is stronger, reduces the crop absorption to cadmium, thus reaches to repair target.There is remediation efficiency height, can grasp
The advantages such as the property made is strong, environmental risk is little.The present invention is possible not only to significantly reduce cadmium in soil available Cd content and vegetable body
Content, and yield of vegetables can be significantly improved, improve quality of vegetable, moreover it is possible to improvement soil physico-chemical property, improve soil microorganism
Environment, promotes vegetable root system growth, improves vegetable disease-resistant.
Beneficial effect
(1) present invention is by multiple recovery techniques such as in-situ passivation, phytoremediation and microorganism remediation the most altogether, profit
Pollute with cooperative effect rehabilitating soil Cd effectively.The present invention make the effective cadmium content of soil than comparison reduce 8.3%～
36.3%, make the full cadmium content of soil reduce 18.9%～33.1%, make Cd content in tamato fruit reduce 9.6%～
54.8%.Chinese cabbage edible part Cd content decreases 19.3%～50.7%, Lettuce edible part Cd content ratio than comparison
Comparison decreases 14.0%～29.6%.
(2) present invention not only helps and improves soil physico-chemical property (soil pH, CEC etc.), and its plant contained is raw
The trace element such as ferrum needed for length, magnesium, calcium, silicon, can improve the fertility of soil, strengthen crop to the suction of nutrient in soil
Receive, improve crop yield.After using this method and technology rehabilitating soil, soil pH adds 0.32～1.57, and soil CEC improves
2.6%～23.6%, yield of vegetables adds 17.6～91.4%.
(3) present invention also can improve the quality of agricultural product.After using this restorative procedure and technology, make tamato fruit reduces
Sugar increases by 5.9%～44.6%, and aminoacid increases by 12.7%～180.5%, and Vc content improves 17.9%～52.6%.DABAI
Dish volume increase 21.3%～35.2%, Vc content adds 12.7%～56.8%, amino acid content add 15.2%～
37.9%, content of reducing sugar adds 7.1%～16.8%, and nitrate content reduces 5.5%～27.2%.Increase production of leaf lettuce
48.8%～227.5%, Vc content adds Vc content 3.3%～23.7%, amino acid content add 11.4%～
49.6%, content of reducing sugar adds 5.1%～37.9%, and nitrate content reduces 9.1%～30.1%.
(4) present invention can also improve soil microorganism environment, promotes plant root growth, improve vegetable resistance (disease resistance,
Resistance etc.)；Soil acidity can be improved, reduce crop disease and insect and occur.After using this restorative procedure and technology, vegetable soil-borne disease
Insect pest incidence rate decreases 36.1%～68.0%, and pesticide puts into and decreases more than 30%.
(5) present invention not only optimizes the in-situ passivation reparation of cadmium pollution soil, phytoremediation and microorganism remediation efficiency,
The most also new and effective repair materials, method and technology is provided for Cadmium Pollution in Soils recovery technique.
(6) raw material sources of the present invention are extensive, are easy to implement easy.To the structure of soil without destroying, it is to avoid apply other and change
The pollution that soil, underground water and air may be caused when learning material, nuisanceless, non-secondary pollution, environmentally friendly.
(7) nano material of the present invention refers to crystallite dimension at least molecule within 1000nm in a dimension.
There is bigger external surface area, have that more prominent surface nature, framing structure be more complete and rule, microchannel is shorter and advises
Then.The present invention makes it have bigger specific surface area and ion-exchange capacity, has common passivator in terms of heavy metal reparation
The superiority that cannot be equal to.Meanwhile, work in coordination with the phytovolatilization effect that played in repairing heavy metal in soil pollutes, plant extraction is made
With with rhizosphere filtration；Processing cost is low, for based technique for in-situ remediation, has protection table soil, minimizing erosion and soil erosion
Effect, effect on environment is little, can be widely applied to the reclaiming of mine, the improvement of heavy-metal contaminated soil, is the dirt of a kind of cleaning
Dye treatment technology；The amount of waste produced is less, and can reclaim heavy metal.Meanwhile, collaborative microorganism remediation, change and convert
Metal ion form thus reduce the toxicity of heavy metal in soil, or promoted the suction of plant heavy metal by microorganism
Receive；Structure material passage in soil entrance plant, the absorption of promotion certain plants heavy metal, thus reinforced nano,
Metallic pollution in plant soil restoration.
(8) being passivated after the present invention takes plant extract repairing again, or use to be passivated reparation, heavy metal richness is amassed
Plant catch cropping, the auxiliary recovery technique of Arbuscular Mycorrhizal Fungi, i.e. in-situ passivation reparation, plant extract and microorganism remediation etc. are multiple
The conjunctive use of recovery technique, coordinated, play the respective chief, reduce heavy metal-polluted soil suction in crops to maximize
Receive accumulation, be to realize the preferable repairing effect of heavy-metal contaminated soil and effective approach.
Detailed description of the invention
Below by embodiment, the present invention is specifically described, it is necessary to it is pointed out here that, following example are only
Being used to further illustrate the present invention, it is impossible to be interpreted as limiting the scope of the invention, this skilled person can
The present invention made some nonessential improvement and adjustment according to the invention described above content.The embodiment of new technical scheme and
The evaluation index of new effect and parameter.
Matched group described in the following example is the restorative procedure removing in same cadmium pollution soil and not using the present invention, its
Its plantation and management condition and the identical process of mode.
Embodiment 1
The restorative procedure of a kind of Cadmium Pollution in Soils: on cadmium pollution soil (the full cadmium content of soil is 4.783mg/kg), often
Mu ground is executed soil and is weighed nano zeolite and the nano-sized magnesium hydroxide of land for growing field crops fertilizer amount 0.05%～0.1% of 0.1%～0.5%,
Spread fertilizer over the fields uniformly, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fully mix with soil, depth of turning soil
15～20cm, after balancing 5～7 days, transplant Chinese cabbage or Lettuce seedling.
After using this restorative procedure and technology, make soil pH add 0.85～1.57, soil CEC improve 9.1%～
23.6%.After using this restorative procedure and technology, the effective cadmium content of soil is 0.401～0.473mg/kg, than (soil before repairing
Effectively Cd content is 0.630mg/kg) reduce 24.9%～36.3%.Chinese cabbage edible part Cd content be 1.562～
2.037mg/kg, decreases 35.8%～50.7% than comparison (edible part Cd content is 3.171mg/kg).Chinese Cabbage Yield
It is 7362.8～8291.6kg/667m2, than comparison, (yield is 6014.1kg/667m2) volume increase 22.4%～37.9%.Chinese cabbage
Vc content is 27.3～33.9mg/100g, than comparison (Vc content is 22.9mg/100g) add Vc content 19.2%～
48.0%；Chinese cabbage amino acid content is 13671.2～15528.4 μ g/100g, and than comparison, (amino acid content is 11455.2 μ
G//100g) add 19.3%～35.6%；Chinese cabbage content of reducing sugar is 1.68%～1.79%, than comparison (reducing sugar
Content is 1.55%) add 8.4%～15.5%；Nitrate content in Chinese cabbage is 1596.3～1911.9mg/kg, than comparison
(nitrate content is 2593.7mg/kg) reduces 12.8%～27.2%.Alkaline nano zeolite (pH 9.2) and alkaline nano
Magnesium hydroxide (pH 10.3) significantly reduces the sickness rate of Chinese cabbage, and soil-borne disease insect pest incidence rate is 13.8%～18.5%, than
Comparison (soil-borne disease incidence rate is 43.2%) decreases 57.2%～68.1%, and pesticide puts into and reduces more than 30%.
After using this restorative procedure and technology, make soil pH add 0.86～1.49, soil CEC improve 7.5%～
22.1%.After using this restorative procedure and technology, the effective cadmium content of soil is 0.167～0.188mg/kg, than (soil before repairing
Effectively Cd content is 0.210mg/kg) reduce 10.5%～20.5%.Lettuce edible part Cd content be 1.617～
1.935mg/kg, decreases 11.0～28.6% than comparison (edible part Cd content is 2.399mg/kg).Lettuce yield is
743.4～1051.8kg/667m2, than comparison, (yield is 321.2kg/667m2) volume increase 131.5%～227.5%.Lettuce Vc
Content is 6.6～7.5mg/100g, adds Vc content 8.2%～22.9% than comparison (Vc content is 6.1mg/100g)；Oil
Wheat dish amino acid content is 7346.1～8631.5 μ g/100g, increases than comparison (amino acid content is 6411.4 μ g//100g)
14.6%～34.6%；Lettuce content of reducing sugar is 1.92%～2.21%, and than comparison, (reducing sugar content is
1.77%) 8.5%～24.9% is added；Lettuce nitrate content is 1783.8～2319.3mg/kg, than comparison (nitric acid
Salt content is 3151.0mg/kg) reduce 9.1%～30.1%.Alkaline nano zeolite (pH 9.2) and alkaline nano hydroxide
Magnesium (pH 10.3) significantly reduces the sickness rate of Lettuce, and soil-borne disease insect pest incidence rate is 14.2%～19.1%, than comparison
(soil-borne disease incidence rate is 40.9%) decreases 53.1%～65.4%, and pesticide puts into and reduces more than 30%.
Embodiment 2
The restorative procedure of a kind of heavy metal cadmium soil: cadmium pollution soil (the full cadmium content of soil is 4.531mg/kg)
On, every mu of ground is executed soil and is weighed nano zeolite and the nanometer hydrogen-oxygen of land for growing field crops fertilizer amount 0.05%～0.1% of 0.5%～1.0%
Change magnesium, spread fertilizer over the fields uniformly, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fully mix with soil, dig
The degree of depth 15～20cm, after balancing 5～7 days, transplants tomato seedling.Tomato seedling is transplanted equal for the rye grass after sterilizing accelerating germination after 15 days
Even sowing sends out 20～40 around tomato seedling surrounding, every strain.
At Tongnan, Chongqing City Vegetable Base during 2012～2016, after using this restorative procedure and technology, make soil pH
Adding 0.38～0.74, soil CEC improves 8.5%～19.5%.85d after repairing heavy metal in soil Cd pollution, soil has
Effect cadmium content is 0.151～0.167mg/kg, reduces 13.5% compared with (soil effective Cd content is 0.193mg/kg) before repairing
～21.8%.In soil, full Cd content is 4.531mg/kg before reparation, is 3.205～3.720mg/kg, relatively repairs after reparation
The full cadmium content of front soil reduces 17.8%～29.3%.In tamato fruit, Cd content is 1.713～2.251mg/kg, relatively compares
(3.527mg/kg) 36.2%～51.4% is reduced.Compared with the control, tomato yield is 4335～7344kg/667m2, volume increase
17.6%～64.2% adds 20.6%～26.0%, and tamato fruit amino acid content is 52.6～65.1mg/kg, relatively compares
Improve 12.7%～167.4%, reducing sugar content is 0.602%～0.758%, relatively comparison improve 11.5%～
38.9%, Vc content is 57.3～72.4mg/100g, and relatively comparison improves 31.4%～47.2%.Soil-borne disease insect pest incidence rate
Being 18.7%～28.4%, decrease 38.7%～59.6% than comparison (soil-borne disease incidence rate is 46.3%), pesticide puts into
Reduce more than 30%.The brightest and the cleanest beautiful uniform coloring in tamato fruit surface, fruit type is full.
Embodiment 3
The restorative procedure of a kind of heavy metal cadmium soil: on Cd Pollution in Soil (4.531mg/kg), every mu of ground is executed
Soil weighs nano zeolite and the nano-sized magnesium hydroxide of land for growing field crops fertilizer amount 0.05%～0.1% of 0.5%～1.0%, spreads uniformly
Execute, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fully mix with soil, depth of turning soil 15～20cm,
After balancing 5～7 days, transplant tomato seedling.Tomato seedling transplant Arbuscular Mycorrhizal Fungi after 15 days (Glomus mosseae, Glomus intraradices,
The each 15g of Glomus etunicatum 45g altogether).
At Tongnan, Chongqing City Vegetable Base during 2012～2016, after using this restorative procedure and technology, make soil pH
Adding 0.51～0.76, soil CEC improves 8.9%～20.1%.After repairing heavy metal in soil Cd pollutes 100d, soil has
Effect cadmium content be 0.158～0.177mg/kg, compared with repair before (soil effective Cd content is 0.193mg/kg) reduce 8.3%～
18.1%.It is 4.531mg/kg before full Cd content is before reparation in soil, is 3.754～3.981mg/kg after reparation, relatively repairs
The full cadmium content of front soil reduces 12.1%～17.2%.In tamato fruit, Cd content is 2.522～3.187mg/kg, relatively compares
(3.527mg/kg) 9.6%～28.5% is reduced.Compared with the control, tomato yield is 7056～7632kg/667m2, volume increase
70.6%～91.4%, tamato fruit amino acid content is 57.1～68.3mg/kg, relatively comparison improve 22.3%～
180.5%, reducing sugar content is 0.618%～0.789%, and relatively comparison improves 14.5%～44.6%, and Vc content is
58.3～75.1mg/100g, relatively comparison improves 33.7%～52.6%.Soil-borne disease insect pest incidence rate be 17.2%～
26.9%, decrease 41.9%～62.9% than comparison (soil-borne disease incidence rate is 46.3%), pesticide put into reduce 30% with
On.The brightest and the cleanest beautiful uniform coloring in tamato fruit surface, fruit type is full.
Embodiment 4
The restorative procedure of a kind of heavy metal cadmium soil: on Cd Pollution in Soil (4.531mg/kg), every mu of ground is executed
Soil weighs nano zeolite and the nano-sized magnesium hydroxide of land for growing field crops fertilizer amount 0.05%～0.1% of 0.5%～1.0%, spreads uniformly
Execute, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fully mix with soil, depth of turning soil 15～20em,
After balancing 5～7 days, transplant tomato seedling.Rye grass after sterilizing accelerating germination is uniformly sowed after transplanting 15 days by Fructus Lycopersici esculenti Hot Pepper Seedling
Fructus Lycopersici esculenti surrounding, sends out 20～40 around every strain.Rye grass SANYE wholeheartedly time, around rye grass root, uniformly inoculation AM is true
Bacterium (Glomus mosseae, Glomus etunicatum, Glomus intraradices amount to 45g), the AM fungal spore of three kinds of mycorhiza is deposited in sand respectively
In soil, it is mixed in soil with the ratio uniform of 1: 1: 1, is inoculated in around the root of planting plants.
At Tongnan, Chongqing City Vegetable Base during 2012～2016, after using this restorative procedure, soil pH is made to add
0.47～0.85, soil CEC improves 7.3%～15.6%.After repairing heavy metal in soil Cd pollutes 100d, the effective cadmium of soil contains
Amount is 0.123～0.155mg/kg, than repair before (soil effective Cd content is 0.193mg/kg) reduce 16.7%～
36.3%.In soil, full Cd content is 4.531mg/kg before reparation, is 3.029～3.674mg/kg after process, before relatively repairing
The full cadmium content of soil reduces 18.9%～33.1%.In tamato fruit, Cd content is 1.601～1.973mg/kg, relatively compares
(3.527mg/kg) 44.1%～54.6% is reduced.Compared with the control, tomato yield is 4644～5394kg/667m2, volume increase
20.6%～26.0%, tamato fruit amino acid content is 53.5～48.1mg/kg, relatively comparison improve 14.6%～
97.5%, reducing sugar content is 0.572%～0.659%, and relatively comparison improves 5.9%～20.8%, and Vc content is 51.4
～63.8mg/100g, relatively comparison improve 17.9%～29.7%.Soil-borne disease insect pest incidence rate is 16.5%～24.2%, than
Comparison (soil-borne disease incidence rate is 46.3%) decreases 47.7%～64.4%, and pesticide puts into and reduces more than 30%.Fructus Lycopersici esculenti fruit
The brightest and the cleanest beautiful uniform coloring in real surface, fruit type is full.
Claims (10)
1. the method repairing vegetable soil cadmium pollution, use include soil weigh 0.5% ~ 1.0% nano zeolite, by 0.1% ~
The nano-sized magnesium hydroxide of 0.5% land for growing field crops fertilizer amount, by spreading fertilizer over the fields, ditch spread, spreads manuer in holes, fully mixes with soil, depth of turning soil 15-
20 cm, after balancing 5-7 days, transplant vegetable or other crop.
2. the method repairing vegetable soil cadmium pollution as claimed in claim 1, also includes catch cropping rye grass and clump branch fungus, rye (Secale cereale L.)
Amount ratio between grass and AMF is 8: 9, and wherein the unit of rye grass is grain, and mycorhiza unit is gram.
3. the as claimed in claim 2 method repairing vegetable soil cadmium pollution, after crop is transplanted 15 days by sterilizing accelerating germination after
Rye grass uniformly sow in plant surrounding.
4. the method repairing vegetable soil cadmium pollution as claimed in claim 3, is 1 ~ 10 mg/kg contaminated soil at cadmium concentration
In, disseminate 20 ~ 40 rye grasses around every strain crop.
5. the as claimed in claim 2 method repairing vegetable soil cadmium pollution, after crop is transplanted 15 days or rye grass SANYE
Time wholeheartedly, Arbuscular Mycorrhizal Fungi near its root.
6. the method repairing vegetable soil cadmium pollution as claimed in claim 5, described AMF includes Moses's sacculus
One or more in mould, Glomus etunicatum, Glomus intraradices.
7. the method repairing vegetable soil cadmium pollution as claimed in claim 6, ball in Glomus mosseae, Glomus etunicatum, root
Capsule is mould with 1: 1: 1 weight proportion.
8. the method repairing vegetable soil cadmium pollution as claimed in claim 5, when Cadmium in Soil concentration is 1 ~ 10 mg/kg, clump
Branch mycorhiza consumption is 45 g.
9. the method repairing vegetable soil cadmium pollution as described in claim 1-8 is arbitrary, described nano zeolite and nanometer hydrogen-oxygen
Change magnesium particle diameter≤100 nm.
10. the method repairing vegetable soil cadmium pollution as claimed in claim 1, comprises the following steps:
(1) concentration range of the contaminated soil sample determination heavy metal Cd that needs carry out repairing is gathered；
(2) every mu of ground is executed soil and is weighed the nano zeolite of 0.1% ~ 0.5% and by the nanometer hydrogen-oxygen of 0.05% ~ 0.1% land for growing field crops fertilizer amount
Change magnesium, spread fertilizer over the fields uniformly, ditch spread, spread manuer in holes at soil surface, manually or mechanically dig and make passivator fully mix with soil, dig
The degree of depth 15 ~ 20 cm, after balancing 5 ~ 7 days, transplants vegetable or other crop；
(3) after crop is transplanted 15 days, the rye grass after sterilizing accelerating germination is uniformly sowed in crop plant surrounding, dense at Cadmium in Soil
When degree is 1 ~ 10 mg/kg, rye grass consumption is 20 ~ 40；
(4) crop transplant after 15 days or rye grass SANYE wholeheartedly time, Arbuscular Mycorrhizal Fungi near plant root, described
AMF is the Glomus mosseae with 1: 1: 1 weight proportion, Glomus etunicatum, Glomus intraradices, in Cadmium in Soil concentration
When being 1 ~ 10 mg/kg, the total consumption of arbuscular mycorrhiza is 45 g.
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| CN114075438A (en) * | 2021-12-02 | 2022-02-22 | 上海康恒环境修复有限公司 | Composite biological agent for repairing heavy metal contaminated soil and preparation method and application thereof |
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