Sedum plumbizincicola-phyllostachys praecox intercropping ecological remediation of heavy metal-contaminated soil

A technology of sedum with ore and polluted soil, applied in the field of ecological restoration of sedum with ore and early bamboo intercropping, can solve the problem of increased absorption of heavy metals, achieve strong heavy metal toxicity resistance, promote underground interaction, and strong competitiveness Effect

Pending Publication Date: 2018-02-27
INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing disclosed technology includes some methods for ecological restoration of soil by intercropping some plants with Sedum sedum, but when Sedum sedum is intercropped with crops such as wheat or rice, due to the intersection of the root growth layers of the two plants , there is an obvious nutrient competition relationship, and due to the activation of heavy metals in the soil by the root system of Sedum sedum with ore, it may lead to an increase in the absorption of heavy metals in crops intercropped

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  • Sedum plumbizincicola-phyllostachys praecox intercropping ecological remediation of heavy metal-contaminated soil

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Embodiment 1

[0016] Before afforestation, weeds on the ground should be cleared, and the afforestation land should be dug to a depth of 30 cm. This test sets three sample plots, respectively randomly distributes a single species of early bamboo (MP), wherein the row spacing of early bamboo plants in Example 1 is 2m × 2m, and the planting points are arranged in a rectangle to dig and plant holes, and the size of the holes is 50cm × 50cm ×50cm. Select the 2-year-old mother bamboo with strong growth, lower branches, luxuriant branches and leaves, no damage by diseases and insect pests, and well-developed fibrous roots for transplanting and afforestation. The diameter of the rhizosphere is 1-3cm. In order to improve the survival rate of early bamboos and promote the growth of mother bamboos into bamboos, the bamboo forests are regularly irrigated, weeded, loosened and protected.

Embodiment 2

[0018] Intercropping early bamboo and sedum with ore (IPS), the row spacing of early bamboo in Example 2 is 2m × 2m, and the planting points are arranged in a rectangle to dig and plant holes, and the size of the holes is 50cm × 50cm × 50cm. For early bamboo forests, 2-year-old mother bamboos with strong growth, low branches, luxuriant branches and leaves, no pests and diseases, and well-developed fibrous roots are used for transplanting and afforestation. The diameter of the rhizosphere is 1-3cm. In order to improve the survival rate of early bamboo and promote the growth of bamboo shoots and mature bamboos, the bamboo forests were regularly irrigated, weeded, loosened and protected; Sedum sedum was transplanted from the nursery, and when 6 true leaves grew, the selected Seedlings of uniform size and good growth. Zaozhu was planted in April 2012, and Sedum sedum was planted in June 2012.

Embodiment 3

[0020] The density of pure sedum (MS) and intercropping sedum-associated sedum (IPS) is about 45,000 plants / ha -1 . Each plot is 10m×20m in area.

[0021] Soil samples were collected from the above three test areas in May 2016. The young bamboos in the test site grow from the shoots of the mother bamboos, and the test bamboo forest is a forest of different ages. The distribution of bamboo ages is: about 3900 bamboos / hm in one year 2 , the 2-year-old early bamboo is about 3600 plants / hm 2 , the 3-year-old early bamboo is about 3000 plants / hm 2 . In each sample plot, randomly select 5 soil profiles according to the "S" shape, then take the upper 0-20cm soil, collect soil samples, and put them into sealed plastic bags. After returning to the laboratory, the gravel and plant residues were sorted out from the fresh soil, and the soil samples were divided into two parts for storage. One part was immediately stored in a sterilized ziplock bag and frozen for extraction of soil mi...

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Abstract

The invention discloses sedum plumbizincicola-phyllostachys praecox intercropping ecological remediation of heavy metal-contaminated soil. Phyllostachys praecox and sedum plumbizincicola are intercropped, root system growth layers of the two plants cross and do not have the obvious nutrient competition relation, the phyllostachys praecox and the sedum plumbizincicola are different in root system depth and different in fertilizer requirement characteristic, the general depth of the root system of the sedum plumbizincicola reaches the soil surface layer, when the depth reaches 30-40 cm, zinc andcadmium heavy metals in the soil cannot be absorbed by the root system of the sedum plumbizincicola, however, the root system of the phyllostachys praecox can reach 30-40 cm and can perform ecological remediation for heavy metals on the soil below the surface layer of the contaminated soil.

Description

technical field [0001] The present invention relates to the regeneration technology of polluted soil in the field of agricultural soil, in particular to a kind of Sedum sedum with ore-early bamboo intercropping ecological restoration of heavy metal polluted soil. Background technique [0002] The discharge and diffusion of heavy metals into the soil system has brought about increasingly serious pollution problems. How to use environmentally friendly technologies to eliminate heavy metals in soil has become a worldwide problem. According to statistics, there are 150 million mu of land polluted by heavy metals in my country, and the direct loss of crops polluted by heavy metals reaches more than 20 billion yuan every year. Soil Heavy metals accumulate in organisms through the food chain, thus posing a threat to food safety and human health. Phytoremediation is to use the absorption, transformation and storage functions of plants and related soil microorganisms to reduce the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 刘世荣卞方圆史作民张小平牛保亮
Owner INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY
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