Перевод названия: Humus characteristics of alluvial dark-humus soils of Krasnoyarsk forest-steep
Тип публикации: статья из журнала
Год издания: 2011
Ключевые слова: alluvial soils, humus characteristics, optical properties, аллювиальные почвы, гумусовые характеристики, оптические свойства
Аннотация: Охарактеризованы аллювиальные темногумусовые глееватые и гидрометаморфизованные почвы Красноярской лесостепи. Выявлены особенности аллювиальных почв на основании макроморфологического исследования, установления основных физико-химических и химических свойств. Установлены закономерности изменения их гумусовых характеристик и свойствПоказать полностью. Определены содержание, состав и свойства гумуса; основные оптические характеристики препаратов гуминовых кислот гумусово-аккумулятивных горизонтов. Alluvial soils are specific formations, whose profiles form under the simultaneous influence of zonal and interzonal processes. The soils are the least investigated in spite of the great importance in view of high fertility. This article is devoted to the alluvial soils of representative parts of the Berezovka, the Buzim, the Kacha and the Esaulovka floodlands in the middle flow of rivers. The investigated objects are located on the territory of Krasnoyarsk forest-steep. The alluvial soils specialties were founded with macro morphological studies and ascertainment of physical-chemical and chemical properties. Mineralogical compositions were studied for soils and matrixes. The quantity, composition and properties of humus were determined. Free or brown humic acids were investigated. The main optical features of humic acids preparations from the upper horizons were determined; there are individual absorption bands, extinction coefficients, refraction coefficient, chromatic coefficients for the studied profiles horizons with the most quantity of organic carbon. The regularities of humus characteristics and other properties changes were established. Consequently, it was determined that alluvial dark-humus gleyey and alluvial dark-humus hydrometamorphized soils have formed in the river valleys of the Berezovka, the Buzim, the Kacha and the Esaulovka on the territory of Kras noyarsk forest-steep. The soils are similar to soils with polynomial profiles, where soil horizons of different development alternate with the river drifts. The matrixes are loose sands and cohesive sands for soils of the Esaulovka and the Kacha rivers and light loam and loamy clay for soils of the Buzim and the Berezovka rivers. Quartz, potash feldspars and plagioclases dominate in mineralogical compositions. The investigated soils are characterized with neutral or alkalescent mediums; high quantity of mobile phosphorus in the upper horizons (to 100 mg/kg); high quantity of sum exchange bases on average in profiles 41 mg-equivalent/100 g (to 53 mg-equivalent/100 g); high quantity of mobile forms of iron (to 0,5%); quantity of carbonate is in all parts and about 2% (to 5%). The content of humus, its composition and allocation depends mainly on extent and type of the flood; grain-size of bringing material; extent of development of vegetation on the surface. The presence of P-type humic acids is caused by periodical floods and abundant moistening. The level of optical density of humic acids preparations shows that relatively new humic acids with a low carbon condensing extent and developed peripheral chains dominate.
Журнал: Вестник Томского государственного университета. Биология
Выпуск журнала: № 1
Номера страниц: 5-10
ISSN журнала: 19988591
Место издания: Томск
Издатель: Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Национальный исследовательский Томский государственный университет