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- W3150237139 abstract "Seasonal variation of heavy metal contents in leaves and their relationships with soil heavy metal pollution levels were studied through measuring and analyzing the leaves of the common tree species in Beijing and soil heavy metal contents,to detect heavy metal accumulation ability of plant leaves. The results showed that: ① the contents of Cu,Pb,Zn in plant leaves first decreased and then increased,again declined with changing the seasons( from spring to winter). Cr concentration showed the trend of first increase and then decrease from spring to winter,and the highest in the autumn; the accumulation capacities of Cu for Babylonica and Japonica were higher in the spring,summer and autumn,while Tabuliformis was in winter; the higher accumulation capacities for Cr,Pb were Japonica and Platycladus,and in winter were Platycladus and Bungeana; the higher accumulation capacities for Zn were Babylonica and Bungeana,while Platycladus in winter; ② the pollution degree of four kinds of heavy metals( Cu,Cr,Pb,Zn) from downtown to suburbs showed that: Jingshan( C = 2. 48,C is contamination factor) Olympic( C = 1. 27) Songshan( C = 1. 20) Shuiguan( C = 1. 18); ③ the heavy metals concentration of same plant leaves in the water of the Great Wall changed larger,but those in the other three areas showed that: Jingshan Olympic Songshan; the ability of same species leaf to absorb different sorts of heavy metals showed that: Zn Cu Pb Cr; the difference between Zn content and Cr content was significant( P 0. 01); ④ the relationship between heavy metal content in plant leaves and soil heavy metal pollution levels presented a quadratic polynomial relation; the significant correlation was found between other three heavy metal contents of plant samples and soil samples,but they were not the case for the Cu,and the correlation coefficients were above 0. 9." @default.
- W3150237139 created "2021-04-13" @default.
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- W3150237139 date "2014-01-01" @default.
- W3150237139 modified "2023-10-03" @default.
- W3150237139 title "Beijing Common Green Tree Leaves' Accumulation Capacity for Heavy Metals" @default.
- W3150237139 hasPublicationYear "2014" @default.
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