섬유

effect of organic acids on aluminum toxicity in subsoils

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 223
aluminum has long been recognized as a major limiting factor for root growth in acid subsoils, but little has been done to delineate toxic and nontoxic forms of soil-solution al. in an effort to determine if the presence of organic acids in soil solutions affected al phytotoxicity, short-term, split-root experiments were conducted with cotton (gossypium hirsutum l. ) taproots as the growth indicator. based on pure solution experiments, short-chain, carboxylic acids can be divided into three groups as al detoxifiers: (i) strong (citric, oxalic, tartaric), (ii) moderate (malic, malonic, salicylic), and (iii) weak succinic, lactic, formic, acetic, phthalic). the al detoxifying capacities of these acids were positively correlated with the relative position of oh/cooh groups on their main c chain, positions that favored the formation of stable 5- or 6-bond ring structures with al. (edited author abstract) refs
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