Effects of mixture of broad-leaved trees on the chemical characteris-tics of the soil in Japanese cypress stand

• TAKAHASHI T.

  The United Grad. Sch. of Agric. Sci., Tokyo Univ. of Agric. and Technol.

• HAIBARA K.

  Fac. of Agric., Tokyo Univ. of Agric. and Technol.

• AIBA Y.

  The United Grad. Sch. of Agric. Sci., Tokyo Univ. of Agric. and Technol.

Bibliographic Information

Other Title

• ヒノキ林への広葉樹の混交が土壌の化学的性質に及ぼす影響
• ヒノキ バヤシ エ ノ コウヨウジュ ノ コンコウ ガ ドジョウ ノ カガクテキ

Abstract

Amounts of A₀ horizon, chemical characteristics and characteristics of nitrogen mineralization which influence H⁺ flux in mineral soil (05 cm depth) were measured in 85-year-old Japanese cypress (Chamaecyparis obtusa ENDL.) stands mixed with broad-leaved trees and an adjacent broad-leaved stand to study the effects of the mixture of broad-leaved trees on the chemical characteristics of the soil. Five plots were defined with a each different mixture ratio of broad-leaved trees as measured by basal area. The mixture ratio of each plot were 0, 16, 30, 35, and 100%. The amounts of A₀ horizon and level of nutrients in the A₀ horizon in the mixed stands were greater than those in the 0% plot, but no obvious relationship was found with the mixture ratio. Total C, N concentrations, C/N ratios, and CECs were almost the same in all plots. Nitrogen mineralization was higher in the 35% and 100% plots than in the plots with a lower mixture ratio. The ratio of nitrification to nitrogen mineralized decreased with mixture ratio. It is surmised that the generation of H⁺ from nitrification in a Japanese cypress stand is decreased in the presence of broad-leaved trees. Exchangeable bases, base saturation, and pH increased, but exchangeable Al decreased with increasing proportions of broad-leaved trees. It was concluded that the changes with increasing mixture ratios were influenced by not only the increase of nutrients supplied from the A₀ horizon, but also the decrease of H⁺ in mineral soil.

Journal

• JOURNAL OF THE JAPANESE FORESTRY SOCIETY

  JOURNAL OF THE JAPANESE FORESTRY SOCIETY 78 (3), 244-249, 1996

  THE JAPANESE FORESTRY SOCIETY

Keywords

• Chamaecyparis obtusa stand
• characteristics of nitrogen mineralization
• exchangeable base pH
• mixture of broad-leaved tree

Details

• CRID: 1390282681337379456
• NII Article ID: 110002834948
• NII Article ID: 10009709555
• NII Book ID: AN00198561
• DOI: 10.11519/jjfs1953.78.3_244
• ISSN: 21858195
• ISSN: 0021485X
• NDL BIB ID: 4029237
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030542289
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4029237
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed