Data/hora: 09/06/2024 11:53:06

Provedor de dados: 	19	
País: 	Japan	
Título: 	泥炭土における土壌溶液採取方法の検討

Examination of Sampling Methods of Soil Solution in Surface Peat Soils	
Autores: 	谷, 昌幸; 佐藤, 貴之; 近藤, 錬三; Tani, Masayuki; Sato, Takayuki; Kondo, Renzo.	
Data: 	2003-12	
Ano: 	2003	
Palavras-chave: 	採取方法; 泥炭; 土壌溶液; 無機イオン組成; 溶存有機物; Dissolved organic matter; Inorganic ion composition; Peat; Sampling methods; Soil solution.	
Resumo: 	泥炭からの土壌溶液の採取方法が土壌溶液の組成・特徴に及ぼす影響を4つの方法で比較検討した.対象とした泥炭地は,泥炭の分解度と理化学性が異なる霧多布泥炭地と湧洞沼泥炭地の2地点で,各地点において2×2mの方形区内の4カ所から泥炭および土壌溶液を採取した.減圧ポーラスカップ法(PC法),遠心分離法(CF法),振とう水抽出法(WE法),および泥炭地で一般的に用いられている泥炭を採掘した坑に湧出する水を採取する方法(PW法)の4つの溶液採取方法を用いた.1)各地点4カ所の泥炭の全炭素・窒素含量,繊維含量,腐植化度などの分解度指標および理化学性の変動係数は,おおむね20%以下であった.2)土壌溶液の水質および無機イオン濃度は4つの方法で大きく異なった.PC法,CF法,WE法で採取した土壌溶液は,泥炭の分解程度の違いによって水質が大きく変化することが示された.また,溶存有機物の光学的な特性も採水方法の違いにより異なった.3)PW法により採取した溶液のEC,溶存有機炭素濃度などの水質の変動係数は,両地点とも約20%以下であり,最もばらつきが少なかった.4)PC法,CF法およびWE法により採取した溶液の水質の変動係数は,泥炭の理化学性の変動係数を大きく上回る項目が多かった.また,これら3つの方法により採取した溶液の水質および無機イオン濃度は,泥炭に含まれる植物繊維の影響を強く受けていると考えられた.  The soil solutions in surface peat soils were collected by using four methods : the peatland water method (PW), by which the seepage water in a pit of peatland was collected, then porous cup method with suction (PC), the centrifugation method (CF), and the water extraction method (WE). Each collecting method was repeated 4 times in a square section (2 m × 2 m) under the same vegetation. Two peatlands developed around the coastal area at the Pacific seaboard of eastern Hokkaido were selected in this study. The aquatic quality and inorganic ion concentration in the soil solutions were analyzed, and their coefficients of variation (CV) and their relation to the properties of peat samples were examined. 1) The physico-chemical properties of peat samples collected from four sites in each square section were not different significantly, while the aquatic qualities and inorganic ion concentration of soil solution samples in the same sections were considerably different among the sampling methods. The aquatic qualities of soil solution collected by using PC, CF, and WE methods, where physical forces were applied to some extent, in particular varied widely and were affected by the indices for the decomposition degree of peat samples. The optical characteristics of dissolved organic matter in the soil solution also differed according to the method of collection. 2) The CV values of the aquatic qualities in each square section ranged from 5 to 93% and differed remarkably, depending on the sampling methods. The method with the least CV in the aquatic qualities of soil solution was the PW method. 3) The PW and PC methods, which could be applied in situ and would reflect the movement of water and nutrient cycling in surface peat soils, were considered to be most suitable for collecting soil solution in peatlands.	
Idioma: 	Japonês	
Identificador: 	http://ir.obihiro.ac.jp/dspace/handle/10322/2967	
Editor: 	日本土壌肥料学会	
Formato: 	application/pdf	
Fonte: 	日本土壌肥料学会