%0 Journal Article
%T INFLUENCE OF MANAGEMENT SYSTEM AND N FERTILIZATION ON SOME SOIL CHEMICAL PROPERTIES IN A PLUM HIGH DENSITY ORCHARD
%A Mihail Iancu
%J Fruit Growing Research
%D 2012
%I Research Institute for Fruit Growing Pitesti
%X The management and fertilization systems are particularly important owing to their influence both on tree behavior and soil properties as well. To highlight this influence of soil management systems (between tree rows and along the row) as well as N fertilization on some chemical components in soil, some investigations have been initiated since 1990 in a plum orchard established in 1984. The studies were performed on tipic planosol located on a flat land from the 3rd terrace of Doamnei river. The following experimental scheme was organized: A Factor ¨C Soil sampling depth, with the graduations: a1 = 0-10 cm; a2 = 10-20 cm; B Factor = Soil management system, with the graduations: b1 = clean cultivation management of 1 cm wide stripe, along the tree row; b2 = the same management of another stripe like in b1 by mulching resulted from the grass mowing; C Factor = N rate, with the graduations: c1 = N0; c2 = N150; c3 = N100; c4 = N150; c5 = N200. The experiment was arranged in the field following the subdivided blocks method with the systematic design of A, B factors in 4 replications. The nitrogen was annually applied as ammonium azotate. P and K fertilization was evenly done over the whole acreage every 2-3 years. In 2011, after 22 years of B, C experimental factors involvement, pH values and P, K contents were registered. On an average, for the 3 soil management systems and 5 N fertilization levels on 0-10 cm versus 10-20 cm depth, pH value was significantly lower by 2.3% and P, K contents very significantly higher by 96% and 30.6% respectively. The soil management by mulching versus the other 2 management systems lead to a significant increase of P content by 48-78% and of K content by 42-62%. An increase of N rate versus to No treatment brought about a general decrease of pH values and certainly of P and K content. The data reported in this paper can be utilized for the selection of an adequate management system and of optimum N rates which are going to be applied in the plum orchards located on soil types with close properties to the experimental soil.
%K phosphorous
%K potassium
%K pH
%K correlations
%U http://www.icdp.ro/publicatii/lucrari%202012/15.%20Iancu%20M.pdf