Behavior of Zinc and Copper in Soil with Long Term Application of Sewage Sludges

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概要

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• Two kinds of sewage sludge composts were applied separately to a crop field consisting of volcanic ash soil (Andosoil) twice a year at 10 t/ha for 12 years since 1978 and the changes in the concentrations of total and soluble Zn and Cu in the sewage sludge-treated soil were studied. The total amount of Zn in the surface soil of the sewage sludge-treated plots increased year by year. The total Zn concentration in the subsoil of these plots was higher than of the non-treated plot after 12 years of application of the sewage sludge. Cu accumulated somewhat in the surface soil, but not in the subsoil during this period. These facts suggest than Zn moved down to about 20 cm in the Andosoil within 12 years. Sewage sludge application increased the ratio of soluble Zn to total Zn in both the surface soil and subsoil during a 9 year period.

• 社団法人日本土壌肥料学会の論文

著者

• Goto Shigeko

  Laboratory Of Plant Nutrition And Fertilizer Faculty Of Agriculture The University Of Tokyo

• Youssef Refat

  Soil And Water Use Laboratory National Research Center

• KUMAZAWA Kikuo

  TOKYO UNIVERSITY

• Owa Naoto

  Tropical Agriculture Research Center

• INANAGA Shinobu

  Arid Land Research Center, Tottori University

• Inanaga Shinobu

  Arid Land Res. Center Tottori Univ.

• Cchino Mitsuo

  Laboratory of Plant Nutrition and Fertilizer, Faculty of Agriculture, The University of Tokyo

• Yoshioka Osamu

  Agriculture, Forestry and Fisheries Research Council, Ministry of Agriculture, Forestry and Fisherie

• Takeshi Naoki

  Zen-Nou Agricultural Technical Center,

• Inou Hideo

  Experimental Farm, Faculty of Agriculture, The University of Tokyo

• De-Long Cai

  Geography Research Institute, Henan Academy of Science

• Cchino Mitsuo

  Laboratory Of Plant Nutrition And Fertilizer Faculty Of Agriculture The University Of Tokyo

• Takeshi Naoki

  Zen-nou Agricultural Technical Center

• Yoshioka Osamu

  Agriculture Forestry And Fisheries Research Council Ministry Of Agriculture Forestry And Fisheries

• De-long Cai

  Geography Research Institute Henan Academy Of Science

• Inou Hideo

  Experimental Farm Faculty Of Agriculture The University Of Tokyo

• Kumazawa Kikuo

  Tokyo University Of Agriculture

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