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Antropogenic vertical formations in the dreined gydromorphic soils of the non-chernozem zoneтезисы доклада
- Автор: Kovalev I.V.
- Сборник: International conference “Problems of antropogenic soil formation”
- Тезисы
- Год издания: 1997
- Место издания: Moscow, Russia
- Первая страница: 123
- Последняя страница: 126
- Аннотация: In draining boggy soils in the Non-chernozem zone, tile and, to a lesser extent, plastic drainage is used. In constructing a drainage system, the backfill of the tile drainage and the slots of the plastic drainage assume a new structure, being different from that of a natural soil profle. The experiments were carried out under production condditions on: 1) soddy-gley and humus-gley soils on clayey eluvial-deluvial deposits on Permian calcareous rock from a depth of 1 meter underlain by argillaceous slate (Kotelnicheskiy district, Kirov region), 2) light-gray forest gleyish soils on mantle loesseire loams. (Stupinskiy district, Moscow region). In constructing the tile drainage a trench 40 cm wide and 120 cm deep was made. The fine earth of the subsoil horizons was turned to the surface, mixed partly with plow horizon and put back into the trench after the drains were laid. This resulted inthe enrichment of the layer 20-120 cm with organic matter as compared to similar layers in the interdrain areas. In laying the plastic drainage, the drain-laying machines were only cutting soil horizons 12 cm wide without disturbing the natural strusture of subsoil horizons.The fine earth over the plastic drain was enriched with humus only due to the shattering of the upper layers. In 16 m distance between the drains the area of tile drainage bacfills is 2.45 % of 1 hectare and plastic drainage slots - 0.72 % of 1 hectare. In the sodaly-gley and humus gley soils (Kirov region) the backfill and slot material were shown, to have similar ddensity, aggregate composition and water permeabbility despite different gualitative composition of the constituting fine earth. In the 10th year from drainage start in the backfills total carbon decreased and fulvic acids increased with depth. Ihis is associated with the movement of major part of water into the drains by filtration th roug h the backfill, in which anaerobbic conditions forming. In the plastic drainage slot it is showed only in humus-gley soils. The sign of hydromorphism, as well as the drainage effectivity is the distribution of nonsilicate iron throughout the slot and backfill profiles.
- Добавил в систему: Ковалев Иван Васильевич