RESEARCHES ABOUT THE INFLUENCE OF MODERATE CONSERVATIVE TILLAGE REGARDING THE PHYSICAL AND CHEMICAL PROPERTIES OF A RED PRELUVOSOL FROM BANU MĂRĂCINE AREA PUBLISHED

Venera Mihaela STROE, Monica STANCIU BURILEANU, Irina CALCIU, Iulia DAMIAN
Conservation tillage or moderat conservativ tillage, which leaves some or all of the residue from the previous crop on the soil surface, effectively protects the soil against erosion. Use of conservation tillage has other environmental implications as well, particularly for water quality, as the reduction in sediment and sediment-associated chemical losses; runoff is also less with conservation tillage, which can reduce losses of soluble or nonadsorbed chemical. This study presents influence of moderat conservativ agricultural technology, on physical and chemical soil properties, in Banu Mărăcine agricultural area, technologies that can protect and increase the soil fertility. The soil on which the expeditionary trials were conducted is a red preluvosol decarbonated, formed on loess deposits consisting of fine materials, clay, loam-clay. Over time (2000-2005), in the stationary perimeter were the study is conducted, were applied a conventional tillage; from 2006 were applied a moderately intensive technology, which led to satisfactory results of production, due to application of mineral fertilization, moderate to high doses of nitrogen and phosphorus and the optimal time of application to work. The soil samples were taken from the four soil profiles, from stationary perimeter, in two stages, in 2006, freshly worked field, after winter wheat crop emergence and after harvesting wheat crop in 2007. Were performed phisical and chemical laboratory analyses wich conducted to the conclusion that after moderat conservative technology were apllied , c ompactness, one of phisical indicator of the soil assessed by two parameters, density and degree of compaction, highlights the immediate negative residual effects of soil tillage, numerical values have been high in both stages, exceeding 18% v / v for compaction degree. This shows that anthropogenic compaction, induce by the conventional system, that were applied for many years in past, in the soil profile is present and very intense, so that makes it necessary to improve the physical conditions of the soil by applying scarification, as an immediate solution and also applying a moderat conservative tillage in the future. Water storage capacity, particularly those available is reduced, due to high fractions, determinated by the content of inactive fraction, by intense soil compactness, by low organic matter content in soil, therefore, measures are needed to improve agrotehnical measures, for physical properties improve and reserve storage capacity of water, especially those accessible to crops, not only by mechanical action, but also conservative tillage.
fertility, soil, tillage, agriculture, conservative
Presentation: oral

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