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内湾底土中の可溶性栄養塩について(2)
https://fra.repo.nii.ac.jp/records/2007459
https://fra.repo.nii.ac.jp/records/200745983fa21de-507c-42d2-9332-e870842a7ae1
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-06-10 | |||||
| タイトル | ||||||
| タイトル | 内湾底土中の可溶性栄養塩について(2) | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
奥田, 泰造
× 奥田, 泰造 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A large amount of the organisms in the bay, are deposited on the sea bottom after death and are decomposed ultimately to form inorganic substances by bacterial action. In this manner, some of these inorganic substances are returned into the sea water, while some accumulate on the sea bottom semi permanently. Therefore, if the nutrients that have accumulated in the bottom deposits are returned to sea water by the bottom harrowing and are utilized by organisms, it is expected that the bay may be efficiently utilized for culture purpose. In the present paper is reported the possibility of supply of the soluble nutrients of muddy deposits into the sea water by the bottom harrowing. The nutrients in muddy deposits (except free-water) that were turned from insoluble nutrients into souble nutrients by shaking with sea water, [were far more abundant than that contained in the free-water. (excepting the PO4-P case) Such a tendency was strongly evident in the deeper layer, and it was found that the insoluble nutrients in deposits turn easily into soluble nutrients. The major features of the vertical distribution of soluble nutrients in deposits taken from Shiogama-Harbour were observed, the results are summarized as follows; (1) In the center and inner parts of the harbour, the PO4-P and NH3-N increased rapidly with depth, while in the entrance of the harbour, the high values of the PO4-P and NH3-N were at the surface (0~0.5cm) and deeper (20~30 cm) layers, and relatively uniform at the intermediate layers. (2) The high contents of the SiO3-Si were at the surface layer in the entrance of harbour and at the deeper layer in the inner parts of the harbour, while in the central parts relatively little change was found with depth. (3) In every parts of the harbour, the maximum contents of NO2-N and NO3-N were found at the surface layer. The experiment on the bottom harrowing was carried out in a small ground, consequently, the nutrient contents of sea water in this ground distinctly increased. As above mentioned, it is thought that the soluble nutrients of muddy deposits are supplied into the sea water by bottom harrowing. | |||||
| 言語 | en | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 底土中に蓄積された栄養物質を耕耘することによって海水中に溶出させ、海水中の含量を増加させうるかどうかについて2，3検討し次の様な結果を得た。(1)栄養塩の遊離水中(底土に含まれる)に溶存する量と、振盪処理によって新たに泥土から可溶化する量を比較した結果、PO4-P(0～10cmの各層共)及び表層部(0～0.5cm)のSiO3-Siは遊離水中の溶存量の方が大きいが他の各栄養塩は後者の量の方が大きく、比較的容易に栄養塩が可溶化して溶出することが知られた。しかも、その傾向は一般に深層部で大きかった。(2)底土に含まれる可溶性栄養塩の垂直分布をしらべたが、一般に含量が大きく、特に港中央部及び港奥部ではPO4-P、NH3-Nは深層部の含量が極めて高かった。(3)以上の点からも、所期の耕耘効果の可能性の大きいことが期待されるが、更に小地域で耕耘試験を行った結果、耕耘後著しく海水中の含量が増加することを知った。こゝに行った実験は極めて小規模で、実際に耕耘を行うに当たっては、その場所により、その対象によって技術的に多くの問題が残ってをり、更に大いに検討がなされねばならないと考える。 | |||||
| 言語 | ja | |||||
| bibliographic_information |
ja : 東北海区水産研究所研究報告 en : Bulletin of Tohoku Regional Fisheries Research Laboratory 巻 2, 号 tnf_k_2_118, p. 118-125, ページ数 8, 発行日 1953-11 |
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| 出版者 | ||||||
| 出版者 | 東北海区水産研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Tohoku Regional Fisheries Research Laboratory | |||||
| 言語 | en | |||||
| item_10002_source_id_9 | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0049-402X | |||||
| item_10002_source_id_11 | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00167637 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | tnf_k_2_118 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010843818 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
