CN109848206A - Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal - Google Patents
Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal Download PDFInfo
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- CN109848206A CN109848206A CN201910137655.6A CN201910137655A CN109848206A CN 109848206 A CN109848206 A CN 109848206A CN 201910137655 A CN201910137655 A CN 201910137655A CN 109848206 A CN109848206 A CN 109848206A
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Abstract
Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal, big bur beggar-ticks is planted in mild or moderate Cd-polluted farmland soil according to natural growth period, is carried out weeding, top dressing, is harvested when big bur beggar-ticks grows to florescence mid-term；By continuously planting big bur beggar-ticks, aforesaid operations are repeated, until the cadmium content in polluted farmland soil reaches environmental safety standard, that is, complete the reparation of Cd-polluted farmland soil.The present invention is that the phytoremediation technology of cadmium pollution soil develops new plant resource variety and restorative procedure, generates economic benefit using the plantation of heavy-metal contaminated soil, no matter from ecological point, or will all have important practical significance from economics point.
Description
Technical field
The present invention relates to the phytoremediation technologies of pollution environment, and in particular to big bur beggar-ticks is in restoration of soil polluted by heavy metal
In application.
Background technique
In recent years, with China's industrial or agricultural fast development, sewage is filled in the unreasonable exploitations of mineral resources, agricultural production
Irrigate, a large amount of uses of agricultural chemicals and scale animal and poultry cultivation waste it is agricultural etc., result in heavy metal in agricultural land soil
Quickly, excessive accumulation.2014 " national Investigation of Soil Pollution bulletin " display China's arable soil heavy metals etc. pollute object point
Position exceeding standard rate, wherein with intermediate pollution point ratio being respectively slightly, slightly 13.7%, 2.8% and 1.8%, is accounted for up to 19.4%
According to 90% or more of total point exceeding standard rate.From the point of view of the element type of Heavy Metals in Soil Contaminated, the pollution of cadmium (Cd) is the most serious,
Point exceeding standard rate reaches 7.0%.Cadmium Pollution in Soils causes China, and the events such as " cadmium rice " " cadmium wheat " take place frequently in recent years, directly threaten
The health of agricultural product quality and safety and the mankind, therefore the improvement and reparation of Cd-polluted farmland soil gradually cause country and ground
The highest attention of Fang Zhengfu.
Phytoremediation technology is in situ, environmentally protective, low in cost due to having many advantages, such as, it has also become polluted farmland soil is repaired
Multiple major technique.In phytoremediation technology, as the plant extract recovery technique of one of its core technology, that is, ultraproduct is utilized
Excessive heavy metal in tired plant absorption removal soil, it is considered to be for heavy-metal contaminated soil reparation most with prospects
Technology.Different types of plant is widely different to the tolerance and accumulation ability of pollutant, therefore, screens efficient rehabilitation plant
Kind is at the key of heavy-metal contaminated soil phytoremediation.
The Cd hyperaccumulator type having now been found that is also relatively limited, including S.plumbizincicola (Sedum
Plumbizincicola), Leersia Sw (Leersia hexandra), black nightshade (Solanum Nigrum), rape (Brassica
Napus), penny cress (Thlaspi caerulescens) etc., and most of existing hyperaccumulative plants are all based on laboratory
What the interior cadmium pollution soil using manual simulation screened, in actual polluted farmland soil repair process, due to soil
In cadmium through a long time aging, validity is much lower compared with manual simulation's cadmium pollution soil, and some hyperaccumulative plants exist plant
It is the features such as strain short and small, slow growth, small biomass, inefficient so as to cause actual repair.
Hyperaccumulative plant majority be in addition, there will be for regional plant, to ecoclimatic condition, soil types and periphery
Ecological environment has strict requirements, and the pest and disease damage when different zones are promoted the use of is caused to take place frequently, and economical character is deteriorated, sternly
Ghost image rings its application in actual repair.
Therefore, seek that biomass is big, growth cycle is short, remediation efficiency strong to heavy metal accumulation ability is high and adaptability
Strong plant is still a vital task of current plant extract repairing research.
Summary of the invention
The technical issues of solution: in view of the above shortcomings of the prior art, big bur beggar-ticks is provided in repairing heavy metal pollution soil
Application in earth, with solve slow growth existing for rehabilitation plant, biomass in existing remediation of heavy metal-contaminated soil it is small,
The problems such as region dependence is strong, pest and disease damage prevention is difficult, practical farmland pollution soil remediation is inefficient.
Technical solution: big application of the bur beggar-ticks (Bidens frondosa L.) in cadmium pollution soil repair.
It is to be planted in big bur beggar-ticks in mild or moderate Cd-polluted farmland soil according to natural growth period using specific method,
Weeding, top dressing are carried out, is harvested when big bur beggar-ticks grows to florescence mid-term；By continuously planting big bur beggar-ticks, in repetition
Operation is stated, until the cadmium content in polluted farmland soil reaches environmental safety standard, that is, completes the reparation of Cd-polluted farmland soil.
Preferably, before planting, fertilising first is carried out to Cd-polluted farmland to turn over, then the big bur beggar-ticks of Seedling Stage is transplanted to
On Cd-polluted farmland soil, weeding, top dressing are carried out in the growth course of big bur beggar-ticks.
Preferably, above-mentioned big bur beggar-ticks seedling 1 half a month before transplanting cultivates in field, to growth of seedling to 10-20cm
It is transplanted.
The above-mentioned big bur beggar-ticks (Bidens frondosa L.) being planted in cadmium pollution soil is a kind of pair of cadmium with super
The plant of strong patience and strong accumulation ability is composite family (Asteraceae) Bidens annual herb plant, cultivation management phase
When be easy, scatter seed on the ground under the conditions of suitable epidemic disaster can self-growth, almost throughout all parts of the country, be
Civil common herbal medicine.
The utility model has the advantages that inventor passes through field trial the study found that big bur beggar-ticks has significant enriched character, energy to cadmium
The normal growth in heavy metal cadmium soil, and cadmium is mainly enriched in overground part.The present invention is exactly using big bur beggar-ticks to cadmium
This patience and enrichment characteristics, it is directly planted on the agricultural land soil of heavy metal cadmium, by mature plant
Harvest processing, to achieve the purpose that remediating heavy metal Cd-polluted farmland soil.Compared to before based on laboratory pot experiment report
The Cd hyperaccumulator in road, the invention patent are directed to field practice, are tested under the natural climate condition of field, should
Plant is not only strong to the accumulation ability of cadmium, but also grows rapidly, and biomass is very big, to the adaptable of soil and weather conditions,
Growth scope is wider, and cultivation is simpler, and management is easy and at low cost, has extremely strong promotional value.The big bur beggar-ticks of harvest can
To be used for biomass power generation as energy-source plant, certain income is obtained while pollution administration, is realized when repairing
The purpose utilized.Therefore, the present invention is that the phytoremediation technology of cadmium pollution soil develops new plant resource variety and reparation
Method generates economic benefit using the plantation of heavy-metal contaminated soil, no matter from ecological point, or all from economics point
It will have important practical significance.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be described in further detail, but this should not be interpreted as in the present invention
The range for stating theme is only limitted to following embodiments.
The test of 1 shimen Hunan realgar area periphery Cd-polluted farmland soil remediation of embodiment
Test site is farmland of the shimen Hunan realgar area periphery by cadmium pollution, and cadmium concentration is 0.3- in the agricultural land soil
0.6mg/kg, soil pH value 4.68-4.94.
The specific practice are as follows: select soil property than more loose, soil layer is more deep, good permeability, and arch is built on well-drained soil
Canopy seedbed.Choose carry out after ground it is conventional turn over, apply fertilizer (application of organic fertilizers 1000kg, compound fertilizer 50kg per acre), by big wolf
In the soil grass live streaming, heat preservation ventilating management and field soil moisture content management are carried out.Polluted farmland soil is turned over, Shi Ji
Fertilizer, when growth of seedling is high to 10-20 centimetres, by seedling according to the 35-40 centimetres of digging cave transplanting of line-spacing and spacing in the rows.After the completion of transplanting
1 water is filled, to improve survival rate after cultivation, in growth period top dressing 1 time (imposing compound fertilizer 30kg per acre).Meanwhile carrying out intertillage
Weeding work.Overground part is harvested when big bur beggar-ticks grows to florescence mid-term.Polluted agricultural land is turned over, is applied fertilizer, continues to plant
Next stubble is planted, aforesaid operations are repeated, until the cadmium content in polluted farmland soil is made to reach environmental safety standard.It is measured after harvest
Big bur beggar-ticks overground part and root cadmium content simultaneously calculate concentration coefficient and transhipment coefficient, while measuring every per mu yield and being extracted with calculating
Remediation efficiency.In order to congener bidens pilosa (Bidens pilosa L.) and bur beggar-ticks (Bidens
Tripartite) remediation efficiency of cadmium pollution soil is compared, while having planted bidens pilosa and bur beggar-ticks, two kinds of plants
Object grows fine, and harvests with the big bur beggar-ticks same period.
Test result is as follows:
Referring to table 1 it is found that on mild or moderate Cd-polluted farmland soil (0.3-0.6mg/kg), with the increasing of soil cadmium concentration
Add, big bur beggar-ticks overground part and root cadmium content dramatically increase, and big bur beggar-ticks overground part cadmium concentration coefficient (overground part and soil
The ratio of cadmium content in earth) and transfer ratio (ratio of overground part and root cadmium content) be respectively 3.99-4.28 and 1.65-
2.24, consistently greater than 1, i.e. overground part cadmium content is consistently higher than in soil and the cadmium content of root, it is seen that big bur beggar-ticks is to a huge sum of money
Belong to the enrichment of cadmium clearly, and cadmium is mainly enriched in overground part.Bidens pilosa and bur beggar-ticks also have cadmium obviously
Enrichment, but overground part concentration coefficient and transfer ratio are far below big bur beggar-ticks, show big bur beggar-ticks to heavy metal cadmium
Enrichment is substantially better than bidens pilosa and bur beggar-ticks.
The enrichment characteristics of big bur beggar-ticks, bidens pilosa and bur beggar-ticks to cadmium under 1 field growing conditions of table
As can be seen from Table 2, big bur beggar-ticks growth is rapidly, the upperground part biomass is very big, in mild or moderate Cd-polluted farmland soil
Upper (0.3-0.6mg/kg), the average plant height of big bur beggar-ticks can achieve 2.0 meters, the overground part mu of each big bur beggar-ticks of Growing season
Producing dry weight can achieve 1820-2013kg, can at least plant two batches every year, extract in year remediation efficiency can achieve 10% with
On, it thus calculates, in the big bur beggar-ticks of mild or moderate Cd-polluted farmland grown on soil, repairs cadmium content in 3-5 soil
Drop to safety standard or less, it is seen that big bur beggar-ticks has biggish application latent in terms of mild or moderate Cd-polluted farmland soil remediation
Power.
Compared to big bur beggar-ticks, small more of the biomass of bidens pilosa and bur beggar-ticks, the bidens pilosa plant height that is averaged is
80 centimetres, the average plant height of bur beggar-ticks is 60 centimetres, the overground part per mu yield dry weight of each Growing season bidens pilosa and bur beggar-ticks
Respectively 805 and 656kg, it is only 2% or so that year, which extracts remediation efficiency, far below the remediation efficiency of big bur beggar-ticks.As it can be seen that big
Bur beggar-ticks has stronger reparation energy to mild or moderate cadmium pollution soil than the bidens pilosa and bur beggar-ticks for having reported Bidens
Power.
The remediation efficiency of big bur beggar-ticks, bidens pilosa and bur beggar-ticks to cadmium pollution soil under 2 field growing conditions of table
The test of 2 Tongren district Guizhou Province mercury ore area periphery Cd-polluted farmland soil remediation of embodiment
Test site is farmland of the Tongren district Guizhou Province mercury ore area periphery by cadmium pollution, and cadmium mean concentration is in the agricultural land soil
0.5mg/kg, soil pH value are 5.3 or so.
The specific practice is same as above.When test result shows that soil cadmium concentration is 0.5mg/kg, big bur beggar-ticks root cadmium content is
0.746mg/kg, overground part cadmium content are 1.688mg/kg, and overground part concentration coefficient is 3.38, transfer ratio 2.26, still
Greater than 1, the overground part per mu yield average dry weight of each big bur beggar-ticks of Growing season is 2467.9kg, can at least plant two batches every year,
Year extract remediation efficiency can achieve 11.11%, by reparation in 5 years, in soil cadmium content can drop to safety standard with
Under.
Big bur beggar-ticks energy value with higher, the big bur beggar-ticks of harvest can be used for biomass power generation, generate higher
Economic benefit, realize side repair lateral dominance purpose.
Show based on the above results:
1. big bur beggar-ticks has very strong concentration effect to cadmium.
2. big bur beggar-ticks growing way is very good in restorative procedure, every season per mu yield dry weight up to 2000 kilograms or so, extract by year
Remediation efficiency has biggish application potential up to 10% or so in terms of mild or moderate Cd-polluted farmland soil remediation, harvest
Big bur beggar-ticks can be used as energy-source plant for biomass power generation, generate higher economic benefit.Therefore, existed using big bur beggar-ticks
The effect to attract people's attention can be obtained in terms of cadmium pollution soil reparation and economic benefit.
Claims (4)
1. big bur beggar-ticks (Bidens frondosaL.) the application in cadmium pollution soil repair.
2. application according to claim 1, it is characterised in that big bur beggar-ticks is planted in mild or moderate according to natural growth period
In Cd-polluted farmland soil, weeding, top dressing are carried out, is harvested when big bur beggar-ticks grows to florescence mid-term；Pass through continuous kind
Big bur beggar-ticks is planted, aforesaid operations are repeated, until the cadmium content in polluted farmland soil reaches environmental safety standard, i.e. completion cadmium is dirty
Contaminate the reparation of agricultural land soil.
3. application according to claim 2, it is characterised in that before planting, fertilising first is carried out to Cd-polluted farmland and is turned over,
The big bur beggar-ticks of Seedling Stage is transplanted on Cd-polluted farmland soil again, weeding is carried out in the growth course of big bur beggar-ticks, is chased after
Fertilizer.
4. application according to claim 3, it is characterised in that the big bur beggar-ticks seedling before transplanting 1 half a month in field
It cultivates, is transplanted to growth of seedling to 10-20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910137655.6A CN109848206A (en) | 2019-02-25 | 2019-02-25 | Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910137655.6A CN109848206A (en) | 2019-02-25 | 2019-02-25 | Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal |
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| CN201910137655.6A Pending CN109848206A (en) | 2019-02-25 | 2019-02-25 | Big application of the bur beggar-ticks in restoration of soil polluted by heavy metal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404122A (en) * | 2020-10-28 | 2021-02-26 | 武汉市秀谷科技有限公司 | Planting and cultivating method for farmland heavy metal-enriched plants |
| CN115449372A (en) * | 2022-08-24 | 2022-12-09 | 台州学院 | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147914A (en) * | 2006-09-22 | 2008-03-26 | 中国科学院沈阳应用生态研究所 | Method for repairing cadmium pollution soil using with asteraeae plant |
| CN101955262A (en) * | 2010-10-09 | 2011-01-26 | 郑州大学 | Use of bidens frondosa in livestock breeding waste water treatment |
| CN102172608A (en) * | 2011-01-24 | 2011-09-07 | 四川农业大学 | Application of artemisia stolonifera in repairing of heavy metal cadmium polluted soil |
| CN103817141A (en) * | 2014-02-25 | 2014-05-28 | 四川农业大学 | Application of cleavers in restoration of heavy metal cadmium pollution in farmland soil in winter |
-
2019
- 2019-02-25 CN CN201910137655.6A patent/CN109848206A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101147914A (en) * | 2006-09-22 | 2008-03-26 | 中国科学院沈阳应用生态研究所 | Method for repairing cadmium pollution soil using with asteraeae plant |
| CN101955262A (en) * | 2010-10-09 | 2011-01-26 | 郑州大学 | Use of bidens frondosa in livestock breeding waste water treatment |
| CN102172608A (en) * | 2011-01-24 | 2011-09-07 | 四川农业大学 | Application of artemisia stolonifera in repairing of heavy metal cadmium polluted soil |
| CN103817141A (en) * | 2014-02-25 | 2014-05-28 | 四川农业大学 | Application of cleavers in restoration of heavy metal cadmium pollution in farmland soil in winter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112404122A (en) * | 2020-10-28 | 2021-02-26 | 武汉市秀谷科技有限公司 | Planting and cultivating method for farmland heavy metal-enriched plants |
| CN115449372A (en) * | 2022-08-24 | 2022-12-09 | 台州学院 | Biochar for promoting cadmium-polluted soil remediation and preparation method and application thereof |
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Application publication date: 20190607 |
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