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Effects of heavymetal accumulationin apple orchard surfacesoils on the transformation processes of organic matter

Research Project

Project/Area Number 06660070
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Plant nutrition/Soil science
Research InstitutionHirosaki University

Principal Investigator

AOYAMA Masakazu  Hirosaki University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (60150950)

Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsHeavy metals / Apple orchard soil / Plant residue decomposition / Microbial biomass / Microbial activity / Copper / Lead / Arsenic / 土壌 / リンゴ園 / 有機物 / 微生物バイオマス
Research Abstract

The effects of heavy metals (Cu, Pb, As) accumulated in apple orchard surface soils associated with the continuous application of metal-based pesticides on the decomposition of plant residue and the size and activity of the microbial biomass were assessed. The results obtained were as follows :
1.The heavy metals accumulatedin apple orchard soils did not inhibit the decomposition of fresh plant residues, while inhibited considerably the decomposition of humified plant residues.
2.The heavy metals accumulated in apple orchard soils reduced the proportion of the microbial biomass in the soil organic matter and, further, increased the proportion of fungal biomass in the total microbial biomass.
3.The dehydrogenase activity and soil respiration measured as indications of microbial activity were reduced in the presence of heavy metals, when expressed on a soil organic matter basis.
4.The toxicity of the heavy metals accumulated in apple orchard soils was in the order of Cu>>Pb>As with respect to the plant residue decomposition, microbial biomass, and microbial activity.
5.The plant residue decomposition and microbial activity were adversely affected by the water-soluble and exchangeable Cu whose amount depended on the soil pH,whereas the microbial biomass by the slightly soluble heavy metals accumulated in apple orchard surface soils.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Aoyama, M.: "Effects of heavy metal accumulation associated with pesticide application on the decomposition of cellulose and orchard grass in soils." Soil Science and Plant Nutrition. 42. 121-131 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aoyama, M.: "Factors affecting microbial biomass and dehydrogenase activity in apple orchard soils with heavy metal accumulation." Soil Science and Plant Nutrition. 42. 821-831 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aoyama, M.: "Effects of heavy metal accumulation associated with pesticide application on the decomposition of cellulose and orchard grass in soils." Soil Science and Plant Nutrition. 42. 121-131 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aoyama, M.: "Factors affecting microbial biomass and dehydrogenase activity in apple orchard soils with heavy metal accumulation." Soil Science and Plant Nutrition. 42. 821-831 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Aoyama,M.: "Effects of heavy metal accumulation associated with pesticide application on the deconposition of cellulose and orchard grass in soils." Soil Science and Plant Nutrition. 42・1. 121-131 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Aoyama,M.: "Factors affecting microbial biomass and dehydrogenase actirity in apple orchard soils with heayy metal accumnlation." Soil Science and Plant Nutrition. 42・4. 821-831 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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