1993年11月
VERTICAL CHANGES IN SOIL SOLUTION CHEMISTRY IN SOIL PROFILES UNDER CONIFEROUS FOREST
GEODERMA
- ,
- ,
- 巻
- 59
- 号
- 1-4
- 開始ページ
- 57
- 終了ページ
- 73
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/0016-7061(93)90062-P
- 出版者・発行元
- ELSEVIER SCIENCE BV
Soil solution samples from six layers in a brown forest soil were collected regularly over a four year period in a Cryptomeria japonica D. Don plantation, Shiga prefecture, Japan. Samples were analyzed for inorganic N, organic N, total P, Cl-, SO42-, Ca2+, Mg2+, K+ and Na+. Inorganic N mainly consisted of NO3- in the soil solutions. NO3-, Ca2+ and Mg2+ were predominant in the soil solutions over the study period. NO3-, Ca2+ and Mg2+ concentrations and fluxes showed a clear seasonal pattern with peaks in late autumn to early winter in the Ah horizon throughout the study period.
Nitrification potentials in the six soil layers were estimated. Nitrification occurred mainly in the Ah horizon. Nitrification in the Ah horizon accounted for about 90% of the total NO3- production in the soil. In the Ah horizon, the temporal variations in NO3- concentrations and fluxes were attributed to the seasonal nitrification processes. While in the Bw horizon, the patterns were variable, and were attributed to the percolation processes of NO3- produced in the Ah horizon.
NO3- fluxes from the Bw horizon were estimated and ranged from 81 to 186 kg N ha(-1) yr(-1). The estimated high fluxes of NO3- reflected the fertile and nitrogen saturated soil conditions in the Cryptomeria plantation.
Nitrification potentials in the six soil layers were estimated. Nitrification occurred mainly in the Ah horizon. Nitrification in the Ah horizon accounted for about 90% of the total NO3- production in the soil. In the Ah horizon, the temporal variations in NO3- concentrations and fluxes were attributed to the seasonal nitrification processes. While in the Bw horizon, the patterns were variable, and were attributed to the percolation processes of NO3- produced in the Ah horizon.
NO3- fluxes from the Bw horizon were estimated and ranged from 81 to 186 kg N ha(-1) yr(-1). The estimated high fluxes of NO3- reflected the fertile and nitrogen saturated soil conditions in the Cryptomeria plantation.
- リンク情報
- ID情報
-
- DOI : 10.1016/0016-7061(93)90062-P
- ISSN : 0016-7061
- Web of Science ID : WOS:A1993MT86400004