Method for screening ramie varieties and method for restoring cadmium contaminated soil by using ramie

A technology for cadmium-contaminated soil and ramie, which is applied in horticultural methods, botanical equipment and methods, horticulture, etc., can solve problems such as inability to select suitable varieties for planting, and achieve the effects of ensuring yield and repairing cadmium-contaminated soil

Active Publication Date: 2011-09-07
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

However, due to the different degrees of soil pollution by heavy metals, the current classification of plant varieties cannot guide people to choose suitable varieties for planting according to

Method used

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  • Method for screening ramie varieties and method for restoring cadmium contaminated soil by using ramie
  • Method for screening ramie varieties and method for restoring cadmium contaminated soil by using ramie
  • Method for screening ramie varieties and method for restoring cadmium contaminated soil by using ramie

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Embodiment Construction

[0016] 1. Differences in cadmium tolerance of ramie cultivars

[0017] 1.1 Pot experiment

[0018] 1.1.1 Resistance index

[0019] The tolerance of plants under adversity stress is usually expressed by the tolerance index (TI), which is generally based on the root length or shoot height of the plant. The greater the tolerance index, the stronger the plant tolerance. The strength of tolerance is affected by many factors, and it is more accurate to select multiple indicators for comprehensive evaluation. Therefore, the tolerance of ramie varieties was comprehensively studied based on the plant height, the relative quantity of chlorophyll in the leaves, the dry weight of the underground part and the dry weight of the aboveground part, and the tolerance coefficient of the dry weight of the aboveground part was comprehensively studied, and they were ranked by size. The results are shown in Table 1.

[0020] Table 1 The tolerance index of ramie under different Cd treatments (pott...

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Abstract

The invention discloses a method for screening ramie varieties and a method for restoring cadmium contaminated soil by using ramie. In the method for screening the ramie varieties, four characteristics such as overground part dry weight, plant height, relative quantity value of chlorophyll in leaves and underground part dry weight of the ramie are taken as main indexes used for evaluating cadmium resistance of the ramie varieties under the culture condition of nutrient solution, and an average value of a tolerance membership function and overground Cd content of the ramie are indexes to cluster the ramie varieties into four different types, namely a high-resistant low-absorption type, a high-resistant high-absorption type, a low-resistant low-absorption type and a low-resistant high-absorption type; and the method for restoring the cadmium contaminated soil by using the ramie is used for planting the high-resistant low-absorption type varieties to restore light cadmium contaminated soil and planting the high-resistant high-absorption type varieties to restore medium and high cadmium contaminated soil. According to the method, a plurality of indexes are utilized to comprehensively evaluate the capability of cadmium resistance and cadmium absorption of the ramie, various ramie varieties are classified accordingly to guide ramie farmers to plant different varieties in accordance with different cadmium contaminated soils, so that the cadmium contaminated soil can be effectively restored and the yield of the ramie is ensured.

Description

technical field [0001] The invention relates to a method for screening ramie varieties and a method for repairing cadmium-polluted soil by ramie. Background technique [0002] With the acceleration of urbanization and the rapid development of industry, farmland soil has been polluted by various heavy metals. In 1983, American scientist Chaney first proposed the idea of ​​using certain plants that can accumulate heavy metals to remove heavy metal pollution from soil. The proposal of this idea has aroused great interest of researchers, and found that some plants have special ability to accumulate and degrade heavy metal elements, such as ramie may be a super-accumulative plant of Cd and Pb, etc., by planting these plants to reduce or even remove Heavy metal pollution in the soil to achieve the purpose of pollution control and soil restoration. However, due to the different degrees of soil pollution by heavy metals, the current classification of plant varieties cannot guide p...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01G7/00
Inventor 揭雨成佘玮邢虎成康万利朱守晶
Owner HUNAN AGRICULTURAL UNIV
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