Abstract
Olive growing is gaining much interest in Slovenia. In thgis work we report the results of the 5 year experiments, on 9 locations, with the cultivar “istrska belica”. The results of soil and plant analyzes of the olive orchard on carstic soil indicated some unexpected facts about macro-nutrient mobility: although the phosphorus in soil is very low, its values in plants are almost optimal. A similar pattern also occurs with magnesium. On the other hand, we would expect low foliar potassium values, as reported in literature for rainfed orchards on calcareous soils, yet they are not. Also calcium levels are not as expected for orchards on carstic soil (higher values), and thus indicate calcium deficiency. It would definitely be interesting to study it in more details. We found that the results show a negative correlation between phosphorus and potassium plant mobility and soil organic matter.
Highlights
Olive oil production is gaining a lot of interest in Slovenia
The results of soil and plant analyzes of the olive orchard on carstic soil indicated some unexpected facts about macro-nutrient mobility: the phosphorus in soil is very low, its values in plants are almost optimal
We found that the results show a negative correlation between phosphorus and potassium plant mobility and soil organic matter
Summary
Olive oil production is gaining a lot of interest in Slovenia. First, because the wine market is already filled with wine, so selling olive oil seems much easier at the moment. To produce maximum oil quality, good fertilization practices are needed. In smaller orchards, typical for Slovenian agriculture, traditional fertilization may lead to excessive rates of some fertilizers, mainly relatively to N (Fernández-Escobar et al, 2009), and a lack of other nutrients. Unbalanced orchard fertilization can cause environmental degradation (Fernandes and Rossiello, 1995), negatively affect olive oil quality as well as flower quality (Fernandez-Escobar et al, 2008). Application of organic materials in crop production has been strongly encouraged in many places, as a replacement for part or all of the mineral fertilizer used, but often without due consideration to their quality and profitability. With the present experiment we wanted to monitor nutrient mobility in Slovene olive orchard, we wanted to compare tree nutritional status with the literature data, and try to check if any correlation between nutrients mobility and soil organic matter could be found
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