| Oil refineries, steel mills and other heavy industry area of various fuels such as coal, oil released by the combustion is given priority to with air pollution by SO2-Pb compound pollutants on the stability of the ecosystem and human survival and development caused great harm, it become the human need to be addressed one of the increasingly serious environmental crisis. Select the plant of the stronger resistance and absorption ability to pollution composite atmosphere, and construction of green ecological network system, is of atmospheric SO2-Pb compound pollution prevention and control of a simple and durable, low carbon efficient means, is also the leading edge and hotspot in the research of the landscape architecture.Study on SO2-Pb air composite pollution by salix matsudana for oil refinery area field sampling, mainly use three times repetitive randomized block design of experiment, using analysis of variance, multiple comparison, correlation analysis and principal component analysis method of statistical analysis on S, Pb content in the salix matsudana of leaf and chlorophyll content, MDA content, POD activity, APX activity, soluble sugar content, soluble protein content and superoxide anion producing rate and leaf liquid pH 8 measures of physiological and biochemical changes were studied, analysis the purification ability and resistance mechanism of salix matsudana to air compound pollution by SO2-Pb, in order to optimize the selection of atmospheric SO2-Pb absorption composite pollution resistance ability of plants to provide theoretical basis.Conclusion for the research indicates:1. Research on the absorption ability of atmospheric SO2-Pb of salix matsudanaDifferent parts of the salix matsudana of S and Pb content in leaf differences reached extremely significant level (P< 0.01), atmospheric SO2-Pb compound pollution on salix matsudana of S and Pb content in leaves had a significant effect, And S content and Pb content is moderate positive correlation, Showed that salix matsudana has strong absorption ability of atmospheric SO2-Pb compound pollution.2. Research on the resistance mechanism of atmospheric SO2-Pb of salix matsudana(1) Different parts of the salix matsudana of eight physiological and biochemical indexes in leaf differences reached extremely significant level (P<0.01), atmospheric SO2-Pb compound pollution on salix matsudana of leaf chlorophyll content, POD activity, APX activity, soluble sugar content, soluble protein content and superoxide anion generating rate has a significant effect, The chlorophyll content and APX activity was significantly negative correlation, POD activity and APX activity and superoxide anion generation rate was significantly negative correlation, APX activity and superoxide anion generation rate was significantly positive correlation.(2) The first principal component of chlorophyll content, POD activity, APX activity and super oxygen anion producing rate load is higher, The second principal component and soluble sugar content and MDA content in leaf liquid pH value of the load is higher, Soluble protein content in the third principal component load is higher, And according to principal component score coefficient obtained principal component scores of 85.6661 and can be used as the same indicators similar pollution area of plant resistance evaluation reference.(3) Resistance mechanism of salix matsudana itself mainly through enhanced APX activity significantly, And adjust the content of soluble sugar, soluble protein and other biological macromolecules, to maintain the stability of the solution pH, is used to enhance their resistance on pollution and repair ability, effectively resist atmospheric SO2-Pb compound pollution harm to itself. |
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