Foliar additional nutrition in the fruit-growing field
1996
Soare, M. | Borlan, Z. (Institutul de Cercetari pentru Pedologie si Agrochimie, Bucharest (Romania)) | Bandu, G. (SCPP, Caransebes (Romania))
This paper presents data concerning the influence of foliar application of some complex foliar nutrient types under the conditions of SCPP Caransebes (Caras Severin). The composition of these nutrients fulfil the nutritional needs of the fruit-growing species on the fruit yield obtained during a 5-years experimentation period (1987-1991) for apple trees and sour-cherry trees and a 2-years period for plum-trees (1990-1991). The novelty of this paper is represented by the apparent use degrees for yields of macro and microelements from foliar nutrients, as well as the productive degree use of nutrient elements present in soil and in the nutrients applied on soil (we took into account the mean vales for the studied years). The application of different foliar nutrient types on plants teguments determined some significant yield increases for the three species that were studied. The effects of foliar fertilisation remained high under the conditions of motionless experiment. The apparent productive use degrees for yield incresases of the nutrient elements from the complex foliar nutrients applied for apple-trees, sour-cherry trees and plum trees generally exceed 100 per cent. They determine some high productive use levels of the nutrient elements from soil and from the foliar nutrients applied in soil. The experimental data emphasize the ecological protection effect of the supplementary fertilization for a foliar stimulation in yields, especially on soils with light texture and slopping soils.
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