Fertigation as an alternative of the traditional fertilization with phosphorus in the orchards
2005
Kumanov, K. | Stoilov, G. | Dochev, D. (Institut po Ovoshcharstvo, Plovdiv (Bulgaria))
The investigation was carried out in lysimeters on three soil types: alluvial-meadow soil, cinnamonic forest soil and smolnitsa.The fertilizers - urea CO(NH2)2, and phosphoric acid (H3PO4), were supplied through the irrigation system, the annual ammounts being parttioned into monthly doses. It was found that the application of phosphoric acid through the micro-irrigation system increased considerably the migration ability of phosphorus, compared to traditional methods or fertilization and irrigation. Forming a significantly deep zone with high content of available phosphorus and with a favorable soil moisture, the fertigation proved to provide optimum conditions for supplying the fruit tree species with phosphorus and for increasing the effectivness of the phosphorus fertilization.
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