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浅海域の微生物学的研究-1 : 泥質からアンモニア・燐酸塩および有機酸の浸出について


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Title: 浅海域の微生物学的研究-1 : 泥質からアンモニア・燐酸塩および有機酸の浸出について
Other Titles: Microbiological Studies on Shallow Marine Areas―I.On the release of nutrient salts and organic acids from sediment to water layer
Authors: 谷口, 忠敬
Authors (alternative): Taniguti, Tadataka
Issue Date: Oct-1965
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.19, pp.91-99; 1965
Abstract: Laboratory experiments have been carried out to investigate the release of nutrient salts and soluble organic substance, from the sediments of shallow waters, by decomposition of organic matter, especially in view of the relation between the leaching of organic substances and the vicissitude of heterotrophic bacteria. The moist sediments of three different pearl oyster beds, which contained relatively a large amount of orgauic matter, were used for the preparation of sediment-water layer. And in the water layers, ammonia, phosphate, COD, total organic acids and viable count of aerobic or anaerobic bacteria were estimated. The change in pH and Eh of the waters was also determined. The results obtained from the experiments are as follows: 1. The leaching of ammonia, phosphate and organic acids from the sediments was noticed in each of the samples. In the sample in which much of the nutrient salts is released, the leaching of organic acid was also found to be large. 2. The quantity of organic acids in the waters increased gradually but the organic acid appeared to be decomposed and consumed by bacteria after the increase. The accumulation of organic acids in the water was larger in the anaerobic condition than in the aerobic, and the increase of bacterial population was inversely less in the anaerobic condition than in the aerobic. 3. In the sample in which organic acids are released relatively in abundance, the consumption rate of the organic acids was also rapid in comparison with that of others. / 有機物が比較的に多い長崎県の3真珠養殖場の底質を試料として,海泥中の有機物の分解による栄養塩類ならびに可溶性有機物の浸出,特に後者と有機栄養細菌の消長について,実験室的に比較検討し次のような結果を得た. 1)泥質からアンモニア,燐酸塩および有機酸の浸出を各試料で認め,栄養塩類が多浸出した試料では有機酸の浸出も多かった. 2)有機酸は海水中に次第に増加するが,その後微生物によって分解・消費されるようであった.嫌気条件では好気条件よりも有機酸の蓄積が多く,菌数増加は逆に少なかった. 3)比較的多量に有機酸を生成した試料では,その分解・消失の速度も他に較べて速かであった.
URI: http://hdl.handle.net/10069/31545
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第19号

Citable URI : http://hdl.handle.net/10069/31545

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