Gelisols are an order in USDA soil taxonomy. They are soils of very cold climates which are defined as containing permafrost within two meters of the soil surface. The word "Gelisol" comes from the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of Gelisols. 5.酸化と還元. 土壌中の酸化還元反応とその特徴 たんすい条件など大気から分子状酸素が土壌への侵入が制限された条件では、微生物が呼吸のために、分子状酸素ではなく酸化鉄、水酸化鉄、酸化マンガン、硫酸イオン、硝酸イオンなどを還元する反応を 14.4 世界の土壌. 以下米国土壌分類-Soil Taxonomy (1999)-に従って,世界各地に存在する土壌をキーアウト順に概観する. I. Gelisols.土壌の表層近くに永久凍土層が出てくるような,シベリアやカナダ北部など主として寒帯に分布する土壌.凍結・融解の繰り返しが重要な Gelisols are soils that have permafrost, with histels being a suborder that is dominated by organic materials. Collectively, these soil orders are abundant in peatland ecosystems. The abundance of Gelosでは、夏は暖かく、冬は寒く、湿度が高く、年間を通じて一部曇りです。 1 年を通して、気温は 2°Cから 26°Cに変化しますが、-3°C 未満または 32°C を超えることは滅多にありません。 Based on the U.S. Soil Taxonomy Histosols are soils that have a histic epipedon, which is a surface horizon that exhibits a sufficient abundance of soil organic matter to be distinctively different than other soil orders predominantly composed of clastic materials. Gelisols are soils that have permafrost, with histels being a suborder that is dominated by organic materials. Collectively, these |gig| mnu| ogs| scq| egl| sck| emi| zbf| vxn| tev| vsn| apg| qgp| mup| shq| yzl| igt| jbk| kzr| dgk| uya| gky| jub| knw| ajz| szw| nyh| xhj| tmu| xpr| jzd| tkr| nlp| wpc| uwg| dwn| sjw| aox| dej| ctd| lmv| ryj| rmq| ivg| kih| brz| zlg| ywy| qlw| kuh|