Variations of dissolved organic matter and Cu fractions in rhizosphere soil induced by the root activities of castor bean.
作者： Guoyong Huang , Xiupei Zhou , Guagguang Guo , Chao Ren , Muhammad Shahid Rizwan
DOI: 10.1016/J.CHEMOSPHERE.2020.126800
关键词:
摘要: Abstract The root soil interaction affects metal bioavailability in the rhizosphere, thus impacting uptake and accumulation of metals by plants. In this study, a greenhouse experiment using root-bag technique for castor bean plants was conducted to determine i) rhizosphere effect on fractions Cu, ii) characteristics dissolved organic matter (DOM) soil. Results showed that Cu concentration leaves, stems, roots 15.41, 6.71, 47.85 mg kg−1, respectively, control reached up 96.5, 254.9, 3204 mg kg−1 Cu400 treatment, respectively. After cultivating plants, acid exchangeable higher than bulk same addition, whereas concentrations reducible oxidizable residual were all lower those soil, comparison pH decreased while total nitrogen carbon both increased Moreover, low molecular weight acids (LMWOAs) amino treatments between 15.18% 47.17% 36.35%–200%, respectively with respect control. less complex DOM high LMWOAs shifted from relative stable fraction available fractions.
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