Optimizing mineral nutrition of plums
1996
Vitanova, I. (Opitna Stantsiya po Slivata, Dryanovo (Bulgaria))
Long term field trials with plum trees conducted in the Dryanovo region and investigations in other regional plum orchards in the Central Balkan Mountain region revealed the interactions in the system fertilizer-soil-plant. Changes were followed in some agrochemical indices of the soil due to the effect of growing mineral fertilizer rates, as well as the interrelation between nutrient elements in the leaves and plum tree productivity. A study was made of the content and distribution of nitrogen, phosphorus, potassium, calcium, magnesium, iron and manganese in plum trees and of the biological export of some nutrient elements. The results of these long term investigations concerning plum nutrient regime revealed that the following concentrations of the optimal supply with basic microelements are: 2.8 N, 0.38 P2O5 and 3.0 K2O.
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