Clay minerals in a denudation-accumulative soil catena |
| |
| Authors: | N P Chizhikova N P Sorokina N B Khitrov A A Samsonova |
| |
| Institution: | 1.Dokuchaev Soil Science Institute,Russian Academy of Agricultural Sciences,Moscow,Russia |
| |
| Abstract: | Chernozems and agrochernozems of the Kamennaya Steppe agroforest landscape have a silty clay or clay texture and similar associations
of clay minerals. The plow horizons of the agrochernozems on a slope of 2°–3° to the Talovaya Balka have an increased content
of the smectite phase (50–70%) compared to the upper horizons of the chernozems on flat watersheds (30–50%) due to the lithological
discontinuity of the soil-forming material and the possible total removal of material on the slope by denudation. On slightly
eroded areas, the clay minerals display a more intense disturbance of their crystal lattice structures by pedogenetic processes,
which increase the degree of disorder in their layers and the accumulation of fine quartz in the clay fraction. In the areas
with more significant erosion of the humus horizon, the clay minerals are characterized by their perfect structure and clean
reflections, which are indicative of the outcropping of less weathered material from the middle part of the chernozem profile
less transformed by pedogenesis. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
