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Sweet-sorghum field planting method for remedying Cd, Pb and Cr compound contaminated soil

A technology of compound pollution and planting method, applied in the field of ecological restoration of environmental pollution, can solve the problems of low biomass, no economic benefit, and low total amount of heavy metals in the aboveground part, and achieve a well-developed root system, low cost and large biomass. Effect

Inactive Publication Date: 2016-05-04
新疆农业科学院生物质能源研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a sweet sorghum variety that utilizes renewable energy crops, is simple to operate, does not destroy the physical and chemical properties of the soil, and has the ability to restore cadmium, lead, and chromium compound pollution that generates economic value. Soil field planting method to solve the problems of weak drought tolerance, slow growth, low aboveground biomass, low total amount of heavy metal absorption and accumulation, and only tolerance and enrichment ability for a single heavy metal in the existing heavy metal contaminated soil remediation technology , does not have good economic benefits and other issues

Method used

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  • Sweet-sorghum field planting method for remedying Cd, Pb and Cr compound contaminated soil
  • Sweet-sorghum field planting method for remedying Cd, Pb and Cr compound contaminated soil
  • Sweet-sorghum field planting method for remedying Cd, Pb and Cr compound contaminated soil

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Experimental program
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Effect test

Embodiment 1

[0049] A kind of field planting method of sweet sorghum repairing Cd, Pb, Cr compound polluted soil, described planting method is to adopt following steps to realize:

[0050] ⑴Seed selection: Before sowing, select sweet sorghum seeds, remove small, damaged and moth-eaten grains and sundries, and select large,

[0051] For plump seeds, sun for 2-3 days on a sunny day to kill pathogenic bacteria, promote physiological maturity of seeds, increase dryness, and enhance seed coat penetration

[0052] Air permeability, improve germination rate and germination potential;

[0053] ⑵Soil preparation:

[0054] Polluted plots that have not been irrigated in winter or have poor soil moisture should be irrigated in spring; deep plowing with suitable moisture, plowing to a depth of 25cm, raking and plowing in time, suppressing and preserving moisture, so that the land meets the requirements of flat, loose, broken, neat, clean, and moisture;

[0055] ⑶ Sowing:

[0056] Spring sowing: When...

Embodiment 2

[0082] A field planting method for sweet sorghum repairing Cd, Pb, Cr compound polluted soil, the steps are as follows:

[0083] The method of the invention is carried out in the farmland polluted by heavy metals in Miquan City, Xinjiang, and the test field is polluted by heavy metals to a certain extent. The sweet sorghum seeds used in this experiment came from Jintian 09-1, Jintian 08-1, Jitian 11-8, Jitian 6, Xingaoliang 9, Xingaoliang 4, and Xingaoliang 3 introduced from Xinjiang and other provinces. 10 sweet sorghum varieties or lines, including No. 1, Longza 11, Liaotian 1, and Liaotian 2.

[0084] Contaminated farmland soil remediation test:

[0085] Table 1 Contents of heavy metal elements Cd, Pb, Cr in farmland polluted soil

[0086]

[0087] It can be seen from Table 1 that the soil Cd and Pb content exceeds the national first-level standard value, but the Cr content does not exceed the national first-level standard value, and the soil Cd content exceeds 6.26 ti...

Embodiment 3

[0118] A field planting method for sweet sorghum repairing Cd, Pb, Cr compound polluted soil in arid and semi-arid marginal areas, steps: (1) Seed selection: before sowing, sweet sorghum seeds should be selected, and shriveled, damaged and insect-eaten grains and weeds should be removed. Choose large and plump seeds, and dry them in sunny days for 2-3 days to kill pathogenic bacteria, promote physiological maturity of seeds, increase dryness, enhance air and water permeability of seed coats, and increase germination rate and germination potential;

[0119] ⑵Soil preparation:

[0120] Polluted plots that have not been irrigated in winter or have poor soil moisture should be irrigated in spring; deep plowing with suitable moisture, plowing to a depth of 25cm, raking and plowing in time, suppressing and preserving moisture, so that the land meets the requirements of flat, loose, broken, neat, clean, and moisture;

[0121] ⑶ Sowing:

[0122] Spring sowing: When the 5cm soil tempe...

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Abstract

The invention relates to a sweet-sorghum field planting method for remedying Cd, Pb and Cr compound contaminated soil. The method comprises the following steps: (1) carrying out seed selection; (2) carrying out land preparation; (3) carrying out sowing; (4) carrying out field management; and (5) carrying out harvesting and processing. After a ripening stage, whole sweet sorghum plants are dug out together with roots, and through the heavy-metal absorbing, enriching and transferring capability of sweet sorghum in a natural growth process, excessive heavy metals are removed from soil. The method provided by the invention has the advantages that the cost is low, the operation is simple, physicochemical properties of the soil are not damaged, no secondary pollution is caused, the biological yield is high, and the sweet sorghum has both tolerance and enriching capability to ternary heavy metals. Heavy-metal contaminated arid-semiarid boundary land resources can be effectively utilized, so that the competition to limited arable land between energy crops and grain crops is avoided, and compound heavy-metal contaminated soil can be effectively remedied.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration of environmental pollution, and relates to a method for using renewable energy plant sweet sorghum to restore heavy metal-contaminated soil, in particular to a field planting method for sweet sorghum to restore Cd, Pb, and Cr compound polluted soil. Background technique [0002] The presence of heavy metals in the air, soil and water has a serious impact on biological organisms, and its bioaccumulation in the food chain is extremely dangerous (SanitadiToppil, GabbrielliG. Responsetocadmiuminhigherplants[J]. ). Therefore, it is not suitable to grow food, fodder, fruits and vegetables and other crops that enter the food chain on heavy metal polluted soil. On the other hand, facing the international shortage of fossil fuel resources such as oil and coal, the development of energy plant resources has become a hot topic. [0003] In recent years, phytoremediation of heavy metal-contami...

Claims

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Application Information

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IPC IPC(8): A01G1/00
CPCA01G22/00
Inventor 再吐尼古丽·库尔班吐尔逊·吐尔洪王卉叶凯涂振东
Owner 新疆农业科学院生物质能源研究所
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