Investigation on fertigation of peach on three soils II. Migration and localization of phosphorus
1999
Stoilov, G. | Dochev, D. | Koumanov, K. (Institute of Fruit-Growing, BG-4004 Plovdiv (Bulgaria))
The experiment was carried out in lysimeters on three soil: alluvial-meadow soil (Fluvisol)- sandy loam, cinnamon-forest soil (Luvisol) - clay loam, and smolnitsa (Vertisol) - clay. The fertilizers - urea and phosphoric acid, were supplied through the irrigation system, the annual amounts being partitioned to monthly doses. It was found that, the application of phosphoric acid through the systems for micro-irrigation increased considerably the migration ability of phosphorus, compared to traditional methods of fertigation and irrigation. Forming a significanthly deep zone with high content of available phosphorus and with a faborable soil moisture, the fertigation proved to to provide optimal conditions for supplying of the fruit-tree species with phosphorus and for increasing the effectiveness of the phosphorus-fertilization.
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