Does the Compositional Change of Soil Organic Matter in Rhizosphere and Bulk Soil of Tea Plant Induced by Tea Polyphenols Have Some Correlation with Pb Bioavailability?
A pot experiment was conducted to investigate the compositional change of soil organic matter after tea polyphenols (TP) were added to soil and its effect Pb bioavailability.The soils received two Pb added rates,giving a spiked concentration of 0,300 mg/kg and three TP added rates,0,300,600 mg/kg respectively.Adding of TP to Pb polluted soil increased soil biomass carbon (SMBC) and rhizosphere effect of tea plant.Contrary results were found in soil organic carbon (SOC) change in rhizosphere and bulk soil between Pb polluted and unpolluted treatments.The inconsistency of quantity of humic acid (HA) in rhizosphere and bulk soil between Pb polluted and unpolluted treatments might explain above difference of SOC.Fulvic acid (FA) increased with the addition of TP in both rhizosphere and bulk soil,which might be a result of TP transformation.Positive correlations exist between different composition of SOC of rhizosphere soil,and Pb content in different tissues of tea plants.SMBC was negatively correlated with Pb in young leaves and stem.Based on the above results,we may safely draw the conclusion that SOC components have a close relationship with Pb bioavailability and may significantly influence Pb content in different part of tea plant.
Fulvic acid (FA) Humic acid (HA) Lead (Pb) Rhizosphere (R) Soil microbial biomass carbon (SMBC) Water soluble substance (WSS)
Dechao Duan Mingge Yu Yingxu Chen Luying Dai Dongyan Long Chen Xu
Institute of Environmental Science and Technology,Zhejiang University,Hangzhou 310058,China
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
312-314
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）