CN108787725A - A method of utilizing plant activated cadmium Cadium In Polluted Soil - Google Patents
A method of utilizing plant activated cadmium Cadium In Polluted Soil Download PDFInfo
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- CN108787725A CN108787725A CN201810901784.3A CN201810901784A CN108787725A CN 108787725 A CN108787725 A CN 108787725A CN 201810901784 A CN201810901784 A CN 201810901784A CN 108787725 A CN108787725 A CN 108787725A
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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
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention discloses a kind of methods using plant activated cadmium Cadium In Polluted Soil, and this approach includes the following steps：Planting is cultivated in cadmium pollution soil, completes the activation to cadmium in cadmium pollution soil.The method of the present invention activates cadmium in cadmium pollution soil using plant, it can either maintain plant normal growth, keep yield normal, plant rhizosphere available Cd content can be improved again, reach the effect of activating soil cadmium, it is fast with cadmium activating velocity, cadmium activation effect is good, the advantages that income is high, also there is small investment, maintenance cost is low, quantities is small, administrative skill requires low, it is easy to operate, the advantages that capable of keeping even improveing the physicochemical property of soil, cadmium pollution soil can be taken into account simultaneously to produce when repairing, there is good environmental benefit, Social benefit and economic benefit.
Description
Technical field
The invention belongs to heavy-metal contaminated soil Prevention Technique fields, are related to a kind of side of activated cadmium Cadium In Polluted Soil
Method, and in particular to a method of utilizing plant activated cadmium Cadium In Polluted Soil.
Background technology
It is dug up mine and the comprehensive function of other pollution channels, heavy metal in soil pollution is increasingly severe, wherein heavy metal
Cadmium pollution problem is the most prominent.According to《Standard of soil environment quality》(GB 15618-1995) is shown, cadmium content in acid soil
More than 0.3mg/kg, i.e. there are pollution risks.Thus, heavy metal in soil cadmium pollution becomes limitation crop yield and quality
Key, in addition, heavy metal cadmium health can also be brought by the enrichment of food chain it is potentially hazardous.Therefore, there is an urgent need for counterweights
Metallic pollution soil is repaired, and especially to cadmium pollution soil repair seems particularly urgent.
Currently, phytoremediation technology be it is a kind of with it is economical, green, environmental-friendly and can the advantages such as in-situ immobilization with plant
Recovery technique based on object is absorbed by root system of plant from soil when being repaired to heavy-metal contaminated soil using plant
Heavy metal ion, and it is transported to each position of plant, to which the heavy metal in soil is transferred in plant, realization pair
The reparation of heavy-metal contaminated soil has been widely used for repairing various heavy-metal contaminated soils.For cadmium pollution soil, plant
Object root system is primarily limited to the existing forms of cadmium in the soil to the assimilation effect of cadmium ion, as can the cadmium being absorbed by plants is main
Exist in the form of exchangeable species, however the content of exchangeable cadmium is relatively fewer, i.e. the content of soil available Cd is relatively low, leads
Cause root system of plant that can not effectively absorb more cadmium ions so that plant is difficult to improve the repairing effect of cadmium pollution soil.One
Aspect, in the method for existing activation cadmium pollution soil, although plant used can secrete organic acid, the organic acid kind of secretion
Class is less, and the organic acid content secreted is relatively low, it is difficult to cadmium pollution soil is quickly and efficiently activated, as a result, activation effect
It is poor, in some instances it may even be possible to which that the physicochemical property that can destroy soil makes soil lose recycle value.On the other hand, existing reparation cadmium is dirty
In the method for contaminating soil, the planting season of plant (such as corn) used conflicts with industrial crops (such as rice, wheat), causes
Land resource cannot reasonably be utilized, preferable repairing effect and economic benefit can not be obtained, and the plant products utilized it is low,
Technical costs is big, plants enriched coefficient is small, bad to the extraction effect of cadmium.In fact, since cadmium has toxicity, plant can be inhibited
Growth and development, make plant can not normal growth, be unfavorable for improving plant to the activation effect of cadmium pollution soil, or even be also possible to
The yield that plant can be reduced, causes economic benefit to reduce, and due to the cadmium of plant kernel meeting enriched, seed is caused to contain because of cadmium
Measure exceeded and cannot eat, substantially reduce the use value and economic benefit of plant used, be unfavorable for reducing phytoremediation at
This.Therefore, how to improve the above problem comprehensively, obtain the activated cadmium that a kind of cadmium activating velocity is fast, cadmium activation effect is good, income is high
The method of Cadium In Polluted Soil, the repairing effect for improving phytoremediation cadmium pollution soil are of great significance.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide that a kind of cadmium activating velocity is fast, cadmium is lived
Change that effect is good, the high method using plant activated cadmium Cadium In Polluted Soil of income.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A method of using plant activated cadmium Cadium In Polluted Soil, the described method comprises the following steps：By planting
It is cultivated in cadmium pollution soil, completes the activation to cadmium in cadmium pollution soil.
Above-mentioned method, further improved, the plant is Vicia sativa, pea, Chinese milk vetch, white clover, white feather fan
At least one of beans.
Above-mentioned method, it is further improved, when the plant is pea, Lupinus albus, with broadcast mode by plant species
Son sowing is in cadmium pollution soil；The sowing line-spacing of the vegetable seeds is 10cm~20cm.
Above-mentioned method, further improved, the application rate of the pea is 10kg/ mus~20kg/ mus；The white feather fan
The application rate of beans is 4kg/ mus~6kg/ mus.
Above-mentioned method, further improved, the sowing spacing in the rows of the pea is 25cm~35cm；The Lupinus albus
Sowing spacing in the rows is 15cm~20cm.
Above-mentioned method, it is further improved, when the plant is Vicia sativa, Chinese milk vetch, white clover, with drilling method
By vegetable seeds sowing in cadmium pollution soil；The sowing line-spacing of the vegetable seeds is 10cm~20cm.
Above-mentioned method, further improved, the application rate of the Vicia sativa is 3kg/ mus~4kg/ mus；The Chinese milk vetch
Application rate be 1kg/ mus~2kg/ mus；The application rate of the white clover is 0.5kg/ mus~1kg/ mus.
Above-mentioned method, it is further improved, in the cadmium pollution soil initial concentration of cadmium be 0.3mg/kg~
5.0mg/kg。
Above-mentioned method, further improved, the plant is planted in the fall；The culture is according to plant growth side naturally
Formula carries out；It is the 65%~75% of maximum water-holding capacity that cadmium pollution soil water content is kept in the incubation；It is described to cultivate
Further include applying composite fertilizer and organic fertilizer into cadmium pollution soil in journey.
Above-mentioned method, further improved, the applied amount of the composite fertilizer is 25kg/ mus~35kg/ mus；It is described compound
N, P in fertilizer2O5、K2The weight ratio of O is 15: 10: 10；The applied amount of the organic fertilizer is 450kg/ mus~500kg/ mus.
In the present invention, Vicia sativa (Vicia villosa Roth) used is that pulse family Vetch is annual or more year sward
This plant.Well developed root system, main root are apparent.Vicia sativa is the transitional type of spring habit and winter habit, but is biased to winter habit.Vicia sativa nutriture value
Value is very high.
In the present invention, pea (Pisum sativum Linn) used, which is that pulse family Vetch is annual, climbs up by holding on to draft, and half
Cold resistance crop likes the weather of mild and moist, intolerant to scorching dullness.
In the present invention, Chinese milk vetch (Astragalus sinicus L.) used also known as Chinese milk vetch, are pulse family Astragalus two
Year raw herbaceous plant, main root is looser, lateral root bury it is shallower, on the radicula of main root, lateral root and earth's surface can tumor of taking root, with side
Number in the majority on root.Mostly set is sowed in late rice Chinese milk vetch in the fall, is made the base manure of early rice, is that China rice field most important winter is green
Fertile crop.Chinese milk vetch nutritive value is quite high, in addition to as green manure, moreover it is possible to which directly or ensiling Chinese milk vetch makees feed.
In the present invention, white clover (Trifolium repens L.) used also known as Trifolium repense, white flower clover etc. are
Pulse family Clover perennial herb, wide adaptability, heat resistanceheat resistant winter resistance is strong, can the vigorous growth in acid soil, also can be
It is grown in sand soil, there is certain ornamental value, be one of countries in the world Main Cultivation herbage.
In the present invention, Lupinus albus (Lupinus albus) used is pulse family Lupinus annual herb, relatively cold-resistant (-
5 DEG C or more), happy expression is waited nice and cool.Well developed root system, drought-enduring, optimum sand loam soil.Lupinus albus can be used as feed and green manure, again
It can make ornamental plant.
Compared with the prior art, the advantages of the present invention are as follows：
(1) the present invention provides a kind of methods using plant activated cadmium Cadium In Polluted Soil, by the way that planting exists
It is cultivated in cadmium pollution soil, realizes the activation of cadmium in cadmium pollution soil.It is Vicia sativa, pea, Chinese milk vetch, white in the present invention
Clover, Lupinus albus etc. can in cadmium pollution soil normal growth, and yield keeps normal level, while these plants
Root system can largely secrete a variety of secretion (such as organic acid, including citric acid, malic acid, lactic acid), and the content of secretion is non-
Chang Gao, in conjunction with different agronomy regulation measure (e.g., control planting mode (line-spacing, spacing in the rows and application rate), water management,
Fertilizing management, Pest management etc.), the physicochemical property of cadmium pollution soil is on the one hand improved by plant rhizosphere secretion, is conducive to
The growth of enriching plant, the organic acid for activating cadmium pollution soil on the other hand secreted by plant rhizosphere, to change in soil
The form or bio-toxicity of cadmium improve the bio-available Zn concentration of cadmium in soil, achieve the purpose that improve soil available Cd content,
And then absorption of the later use enriching plant to cadmium in soil is may advantageously facilitate, it preferably improves the reparation to cadmium pollution soil and imitates
Fruit realizes effective reparation to cadmium pollution soil.In addition, when plant maturation, the pod and stalk of plant can be harvested, and produce
Amount is normal, normal economic well-being of workers and staff is able to maintain that, to solve the problems, such as that contaminated soil remediation is neglected neither with production.Side of the present invention
Method activates cadmium in cadmium pollution soil using plant, can either maintain plant normal growth, keeps yield normal, and can
Improve plant rhizosphere available Cd content, reach the effect of activating soil cadmium, have cadmium activating velocity is fast, cadmium activation effect is good,
The advantages that income is high, and also have small investment, maintenance cost is low, quantities is small, administrative skill require it is low, easy to operate, can
The advantages that keeping the even physicochemical property of improvement soil, while cadmium pollution soil can be taken into account and produced when repairing, have good
Environmental benefit, Social benefit and economic benefit.
(2) the method for the present invention is realized under the premise of not destroying farmland ecological environment and existing plantation function to cadmium pollution soil
The activation of cadmium in earth, can not only ensure agricultural product security, while not influence normal agricultural production, when plant maturation, energy
The pod and stalk of plant are enough harvested, yield is in normal level, and the wherein yield of Vicia sativa is 1000kg/ mus~2500kg/
The yield of mu, pea is 150kg/ mus~200kg/ mus, and the yield of Chinese milk vetch is 6000kg/ mus~7500kg/ mus, white clover
Yield be 2000kg/ mu~3000kg/ mu, the yield of Lupinus albus is 250kg/ mus~300kg/ mus, can be generated preferable
Economic benefit, reduce activating cost.
Specific implementation mode
Below in conjunction with specific preferred embodiment, the invention will be further described, but not thereby limiting the invention
Protection domain.
In following present invention embodiment, unless otherwise noted, used material and instrument are commercially available, used technique
For common process, used equipment is conventional equipment, and the data obtained is the average value of the above repetition experiment three times.
Embodiment 1：
A method of using plant activated cadmium Cadium In Polluted Soil, specially utilize in Vicia sativa activation cadmium pollution soil
Cadmium, wherein test site is located at Changsha, Hunan Liuyang City, by Vicia sativa respectively cadmium concentration be 0.5mg/kg and
It is cultivated, is included the following steps in the contaminated soil of 1.0mg/kg：
(1) October the previous year (autumn) carries out site preparation to cadmium pollution soil, and application promotes the root growth of Vicia sativa
Nitrogen-phosphorus-potassium compound fertilizer (commercially available) and organic fertilizer, the wherein applied amount of composite fertilizer is 30kg/ mus, and N, P in composite fertilizer2O5、K2O
Weight ratio be 15: 10: 10, the applied amount of organic fertilizer (commercially available) is 480kg/ mus.
(2) Vicia sativa is seeded into the cadmium pollution soil for applying fertilizer in step (1) with drilling method, is sowed per acre
3.5kg Vicia sativa seeds, line-spacing 15cm are grown by Vicia sativa nature growth cycle, periodically carry out water consumpation management, are kept
Soil moisture content, until Vicia sativa maturation, completes the activation to cadmium in cadmium pollution soil the 70% of maximum water-holding capacity.
Plant harvest period and harvesting method：Vicia sativa overground part is harvested after a growth cycle.Weigh to obtain hair sweet potato
Sub- overground part fresh weight is 2342kg/ mus (0.5mg/kg cadmium pollution soils) and 1526kg/ mus (1.0mg/kg cadmium pollution soils)；It receives
Vicia sativa aerial part (pod, stalk) is obtained, and it is respectively that (0.5mg/kg cadmiums are dirty by 1.95mg/kg to measure the total cadmium content of overground part
Contaminate soil) and 20.18mg/kg (1.0mg/kg cadmium pollution soils)；Vicia sativa Rhizosphere Soil is acquired, Rhizosphere Soil organic acid content is measured
And available Cd content, as shown in table 1.
Embodiment 2：
A method of using plant activated cadmium Cadium In Polluted Soil, specially utilize in pea activation cadmium pollution soil
Cadmium, wherein test site are located at Changsha, Hunan Liuyang City, by pea respectively cadmium concentration be 0.3mg/kg and 3.5mg/kg
Contaminated soil in cultivated, include the following steps：
(1) October the previous year (autumn) carries out site preparation to cadmium pollution soil, and application promotes the root growth of pea
Nitrogen-phosphorus-potassium compound fertilizer and organic fertilizer, the wherein applied amount of nitrogen-phosphorus-potassium compound fertilizer are 35kg/ mus, and N, P in nitrogen-phosphorus-potassium compound fertilizer2O5、
K2The weight ratio of O is 15: 10: 10, and the applied amount of organic fertilizer (commercially available) is 500kg/ mus.
(2) pea is seeded into the cadmium pollution soil for applying fertilizer in step (1) with selecting broadcast mode, sows 15kg per acre
Pea seed, per cave 2-3 pea seed, spacing in the rows 25cm, line-spacing 20cm are grown, periodically by pea nature growth cycle
Water consumpation management is carried out, keeps soil moisture content the 75% of maximum water-holding capacity, until pea maturation, is completed to cadmium pollution soil
The activation of cadmium in earth.
Plant harvest period and harvesting method：Pea Plants overground part is harvested after a growth cycle.Weigh to obtain pea
Beans overground part fresh weight is 189kg/ mus (0.3mg/kg cadmium pollution soils) and 162kg/ mus (3.5mg/kg cadmium pollution soils)；Harvest
Pea aerial part (pod, stalk), and it is respectively 1.91mg/kg (0.3mg/kg cadmium pollution soil to measure the total cadmium content of overground part
Earth) and 21.21mg/kg (3.5mg/kg cadmium pollution soils)；Rhizosphere of Pea soil is acquired, Rhizosphere Soil organic acid content is measured and is had
State cadmium content is imitated, as shown in table 1.
Embodiment 3：
A method of using plant activated cadmium Cadium In Polluted Soil, specially utilize in Chinese milk vetch activation cadmium pollution soil
Cadmium, wherein test site is located at Changsha, Hunan Liuyang City, by Chinese milk vetch respectively cadmium concentration be 1.2mg/kg and
It is cultivated, is included the following steps in the contaminated soil of 3.6mg/kg：
(1) October the previous year (autumn) carries out site preparation to cadmium pollution soil, and application promotes the root growth of Chinese milk vetch
Nitrogen-phosphorus-potassium compound fertilizer and organic fertilizer, the wherein applied amount of nitrogen-phosphorus-potassium compound fertilizer is 25kg/ mus, and N in nitrogen-phosphorus-potassium compound fertilizer,
P2O5、K2The weight ratio of O is 15: 10: 10, and the applied amount of organic fertilizer (commercially available) is 450kg/ mus.
(2) Chinese milk vetch is seeded into the cadmium pollution soil for applying fertilizer in step (1) with drilling method, is sowed per acre
1.5kg Chinese Milk Vetch Seeds, line-spacing 15cm are grown by Chinese milk vetch nature growth cycle, periodically carry out water consumpation management, are kept
Soil moisture content, until Chinese milk vetch maturation, completes the activation to cadmium in cadmium pollution soil the 70% of maximum water-holding capacity.
Plant harvest period and harvesting method：Chinese milk vetch plant above ground portion is harvested after a growth cycle.It weighs
Chinese milk vetch overground part fresh weight is 7253kg/ mus (1.2mg/kg cadmium pollution soils) and 6096kg/ mus of (3.6mg/kg cadmium pollution soil
Earth)；Chinese milk vetch aerial part (stalk) is harvested, and it is respectively 19.84mg/kg (1.2mg/kg cadmiums to measure the total cadmium content of overground part
Contaminated soil) and 36.75mg/kg (3.6mg/kg cadmium pollution soils)；Chinese milk vetch Rhizosphere Soil is acquired, Rhizosphere Soil organic acid is measured and contains
Amount and available Cd content, as shown in table 1.
Embodiment 4：
A method of using plant activated cadmium Cadium In Polluted Soil, specially white clover is utilized to activate cadmium pollution soil
In cadmium, wherein test site is located at Changsha, Hunan Liuyang City, by white clover respectively cadmium concentration be 0.3mg/kg and
It is cultivated, is included the following steps in the cadmium pollution soil of 2.5mg/kg：
(1) October the previous year (autumn) carries out site preparation to cadmium pollution soil, and application promotes the root system life of white clover
Long nitrogen-phosphorus-potassium compound fertilizer and organic fertilizer, the wherein applied amount of nitrogen-phosphorus-potassium compound fertilizer are 25kg/ mus, and N in nitrogen-phosphorus-potassium compound fertilizer,
P2O5、K2The weight ratio of O is 15: 10: 10, and the applied amount of organic fertilizer (commercially available) is 480kg/ mus.
(2) white clover is seeded into the cadmium pollution soil for applying fertilizer in step (1) with drilling method, is sowed per acre
0.8kg white clover seeds, spacing in the rows 10cm, line-spacing 12cm are grown by white clover nature growth cycle, periodically carry out field
Between water management, keep soil moisture content the 70% of maximum water-holding capacity, until white clover maturation, complete to cadmium pollution soil
The activation of middle cadmium.
Plant harvest period and harvesting method：White clover plant above ground portion is harvested after a growth cycle.It weighs
It is 2851kg/ mus (0.3mg/kg cadmium pollution soils) and 2314kg/ mus of (2.5mg/kg cadmium pollutions to obtain white clover overground part fresh weight
Soil)；White clover aerial part (stalk) is harvested, and it is respectively 1.61mg/kg (0.3mg/kg to measure the total cadmium content of overground part
Cadmium pollution soil) and 11.77mg/kg (2.5mg/kg cadmium pollution soils)；White clover Rhizosphere Soil is acquired, it is organic to measure Rhizosphere Soil
Acid content and available Cd content, as shown in table 1.
Embodiment 5：
A method of using plant activated cadmium Cadium In Polluted Soil, specially Lupinus albus is utilized to activate cadmium pollution soil
In cadmium, wherein test site is located at Changsha, Hunan Liuyang City, by Lupinus albus respectively cadmium concentration be 0.5mg/kg and
It is cultivated, is included the following steps in the cadmium pollution soil of 5.0mg/kg：
(1) October the previous year (autumn) carries out site preparation to cadmium pollution soil, and application promotes the root system life of Lupinus albus
Long nitrogen-phosphorus-potassium compound fertilizer and organic fertilizer, the wherein applied amount of nitrogen-phosphorus-potassium compound fertilizer are 30kg/ mus, and N in nitrogen-phosphorus-potassium compound fertilizer,
P2O5、K2The weight ratio of O is 15: 10: 10, and the applied amount of organic fertilizer (commercially available) is 480kg/ mus.
(2) Lupinus albus is seeded into the cadmium pollution soil for applying fertilizer in step (1) with broadcast mode, is sowed per acre
5kg Lupinus albus seeds, per cave 2-3 Lupinus albus seed, spacing in the rows 17.5cm, line-spacing 15cm, by Lupinus albus nature
Growth cycle is grown, and periodically carries out water consumpation management, keeps soil moisture content the 70% of maximum water-holding capacity, until white feather fan
Beans are ripe, complete the activation to cadmium in cadmium pollution soil.
Plant harvest period and harvesting method：Lupinus albus plant above ground portion is harvested after a growth cycle.It weighs
It is 286kg/ mus (0.5mg/kg cadmium pollution soils) and 248kg/ mus of (5.0mg/kg cadmium pollution soil to obtain Lupinus albus overground part fresh weight
Earth)；Lupinus albus aerial part (pod, stalk) is harvested, and it is respectively 1.87mg/kg to measure the total cadmium content of overground part
(0.5mg/kg cadmium pollution soils) and 19.74mg/kg (5.0mg/kg cadmium pollution soils)；Lupinus albus Rhizosphere Soil is acquired, is measured
Rhizosphere Soil organic acid content and available Cd content, as shown in table 1.
As it can be seen from table 1 pea is planted in 0.3mg/kg and 3.5mg/kg cadmium pollution soils by the present invention, Chinese milk vetch
It is planted in 1.2mg/kg and 3.6mg/kg cadmium pollution soils, white clover is planted in 0.3mg/kg and 2.5mg/kg cadmium pollution soil
In earth, Lupinus albus is planted in 0.5mg/kg and 5.0mg/kg cadmium pollution soils, malic acid, breast in their corresponding Rhizosphere Soils
Acid and citric acid content are above the content in corresponding original cadmium pollution soil, and CaCl in Rhizosphere Soil2- Cd and DTPA-Cd
Content is above the content in the original contaminated soil of corresponding cadmium concentration, this illustrates that cadmium can promote plant rhizosphere secretion more to have
Machine acid, and be also beneficial to improve the content of rhizosphere available Cd by secreting more organic acids, to promote cadmium pollution soil
The activation of middle cadmium, while showing that above-mentioned plant has very strong activation capacity to cadmium pollution soil, above-mentioned plant is used for
Huge potentiality are shown in activation cadmium pollution soil.
Organic acid content and available Cd content in the corresponding Rhizosphere Soil of the different plants of table 1
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example.All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It is noted that for the art
Those of ordinary skill for, improvements and modifications without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method using plant activated cadmium Cadium In Polluted Soil, which is characterized in that the described method comprises the following steps：It will
Planting is cultivated in cadmium pollution soil, completes the activation to cadmium in cadmium pollution soil.
2. according to the method described in claim 1, it is characterized in that, the plant is Vicia sativa, pea, Chinese milk vetch, white axle
At least one of grass, Lupinus albus.
3. according to the method described in claim 2, it is characterized in that, the plant be pea, Lupinus albus when, with a broadcast mode
By vegetable seeds sowing in cadmium pollution soil；The sowing line-spacing of the vegetable seeds is 10cm~20cm.
4. according to the method described in claim 3, it is characterized in that, the application rate of the pea is 10kg/ mus~20kg/ mus；
The application rate of the Lupinus albus is 4kg/ mus~6kg/ mus.
5. according to the method described in claim 4, it is characterized in that, the sowing spacing in the rows of the pea is 25cm~35cm；It is described
The sowing spacing in the rows of Lupinus albus is 15cm~20cm.
6. according to the method described in claim 2, it is characterized in that, the plant be Vicia sativa, Chinese milk vetch, white clover when,
Vegetable seeds is sowed in cadmium pollution soil with drilling method；The sowing line-spacing of the vegetable seeds is 10cm~20cm.
7. according to the method described in claim 6, it is characterized in that, the application rate of the Vicia sativa is 3kg/ mus~4kg/ mus；
The application rate of the Chinese milk vetch is 1kg/ mus~2kg/ mus；The application rate of the white clover is 0.5kg/ mus~1kg/ mus.
8. method according to any one of claims 1 to 7, which is characterized in that cadmium is initial in the cadmium pollution soil
A concentration of 0.3mg/kg~5.0mg/kg.
9. method according to any one of claims 1 to 7, which is characterized in that the plant is planted in the fall；The training
It supports and is carried out according to plant nature growth pattern；It is maximum water-holding capacity that cadmium pollution soil water content is kept in the incubation
65%~75%；Further include applying composite fertilizer and organic fertilizer into cadmium pollution soil in the incubation.
10. according to the method described in claim 9, it is characterized in that, the applied amount of the composite fertilizer is 25kg/ mus~35kg/
Mu；N, P in the composite fertilizer2O5、K2The weight ratio of O is 15: 10: 10；The applied amount of the organic fertilizer be 450kg/ mus~
500kg/ mus.
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