Effects of Pinus densiflora on soil chemical and microbial properties in Pb-contaminated forest soil

Sunghyun Kim, Insook Lee, Hojeong Kang

Research output: Contribution to journalArticle

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Abstract

We investigated the effect of Pb uptake by Pinus densiflora and the Pb fraction in forest soil. We also investigated the change in soil physicochemical characteristics, microbial activity, and root exudates of Pinus densiflora in Pb-contaminated soils. Three-year-old pine seedlings were exposed to 500 mg/kg Pb for 12 months. The metal fractions were measured using sequential extraction procedures. Additionally, factors that affect solubility (three soil enzyme activities and amino acids of root exudate compounds) were also determined. The results showed that Pb contamination significantly decreased enzyme activities due to soil characteristics. In addition, organic matter, nitrate content, and Pb concentration were time dependent. The results indicate that changes in the Pb fraction affected Pb uptake by pine trees due to an increase in the exchangeable Pb fraction. The concentrations of organic acids were higher in Pb-spiked soil than those in control soil. Higher rhizosphere concentrations of oxalic acid resulted in increased Pb uptake from the soil. These results suggest that pine trees can change soil properties using root exudates due to differences in the metal fraction.

Original languageEnglish
Pages (from-to)315-322
Number of pages8
JournalJournal of Ecology and Field Biology
Volume34
Issue number3
DOIs
Publication statusPublished - 2011 Oct 17

Fingerprint

Pinus densiflora
polluted soils
forest soils
forest soil
root exudates
Pinus
soil
uptake mechanisms
enzyme activity
metals
soil enzymes
oxalic acid
microbial activity
metal
organic acids and salts
solubility
soil properties
rhizosphere
organic acid
soil organic matter

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

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title = "Effects of Pinus densiflora on soil chemical and microbial properties in Pb-contaminated forest soil",
abstract = "We investigated the effect of Pb uptake by Pinus densiflora and the Pb fraction in forest soil. We also investigated the change in soil physicochemical characteristics, microbial activity, and root exudates of Pinus densiflora in Pb-contaminated soils. Three-year-old pine seedlings were exposed to 500 mg/kg Pb for 12 months. The metal fractions were measured using sequential extraction procedures. Additionally, factors that affect solubility (three soil enzyme activities and amino acids of root exudate compounds) were also determined. The results showed that Pb contamination significantly decreased enzyme activities due to soil characteristics. In addition, organic matter, nitrate content, and Pb concentration were time dependent. The results indicate that changes in the Pb fraction affected Pb uptake by pine trees due to an increase in the exchangeable Pb fraction. The concentrations of organic acids were higher in Pb-spiked soil than those in control soil. Higher rhizosphere concentrations of oxalic acid resulted in increased Pb uptake from the soil. These results suggest that pine trees can change soil properties using root exudates due to differences in the metal fraction.",
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Effects of Pinus densiflora on soil chemical and microbial properties in Pb-contaminated forest soil. / Kim, Sunghyun; Lee, Insook; Kang, Hojeong.

In: Journal of Ecology and Field Biology, Vol. 34, No. 3, 17.10.2011, p. 315-322.

Research output: Contribution to journalArticle

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