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| Effect of Pig Manure Application on Growth, Physiology and Accumulation Characteristic of Pb and Zn in Arabis alpinal var. parviflora Franch and Oxyria sinensis Hemsl |
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| KeyWord:Pb; Zn; Arabis alpinal var. parviflora Franch; Oxyria sinensis Hemsl; pig manure |
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| Abstract: |
| Pot experiments were conducted in order to understand the effects of pig manure application on growth, physiology and accumulation of Pb and Zn in Arabis alpinal var. parviflora Franch and Oxyria sinensis Hemsl with Pb（1000 mg·kg-1） and Zn（1000 mg·kg-1） stresses. The results showed that soil pH value did not vary significantly and CEC increased with increase in pig manure application. Water soluble and exchangeable Pb and Zn increased in soil of A. alpinal and kept stable in soil of O. sinensis. Fe-Mn oxide bound Pb and Zn did not vary significantly. Organic bound Pb and Zn increased significantly with increase in pig manure application. The root length, biomass, leave chlorophyll contents and membrane permeability increased under Pb and Zn stresses with increase in pig manure application, except for biomass of O. sinensis under Pb stress. Contents, accumulation rate, bioaccumulation factor and transfer factor of Pb and Zn in A. alpinal increased with increase in pig manure application, especially contents and accumulation rate reached maximum with pig manure 14 g·kg-1 application. Contents and accumulation rate of Pb in O. sinensis increased and those of Zn decreased with increase in pig manure application. Bioaccumulation factor and transfer factor of Pb and Zn in O. sinensis did not vary significantly. The results indicate that growth and physiology of A. alpinal and O. sinensis could be improved, companying with Pb and Zn contents in A. alpinal and Pb content in O. sinensis increasing with pig manure application under Pb and Zn stresses. The optimal rate of pig manure application was 14 g·kg-1. |
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