Abstract
To test expected positive impact of organic cultivation on potato tubers quality and their mineral composition, selected potato cultivars were planted in conditions of two conventional and two organic farms in central and northern Poland in 2006. Lower tuber yield and elevated levels of quality traits (including tuber flavor) were characteristics of organic locations. Cultivar by location interaction significantly affected tuber flavor. The mineral composition of tubers reflects local variation in this respect, since in organically grown tubers only P and Cu reached higher, while Mn and Cd had lower tuber concentrations. The tuber concentration of these elements strongly correlated with the tuber yield (respectively negatively and positively). For other mineral elements and quality traits correlations were rare, mostly moderate and negative. Generally, potato cultivar should be adapted to the specific growing conditions to achieve improvement of quality traits. An observed cultivar effect indicates possibility of applying breeding methods for developing cultivars with desired mineral composition of tubers.
Highlights
Production indices show that potato (Solanum tuberosum L.) is one of the major crops in the world
To test expected positive impact of organic cultivation on potato tubers quality and their mineral composition, selected potato cultivars were planted in conditions of two conventional and two organic farms in central and northern Poland in 2006
The performance of all cultivars was tested in respect of tuber yield, their morphology and flavor
Summary
Production indices show that potato (Solanum tuberosum L.) is one of the major crops in the world (http://faostat.fao.org). It is valuable source of energy and compounds important in human diet. Potato tubers supply mainly carbohydrates, but are relatively rich source of proteins, vitamins, dietary fibre and some minerals. Among the latter, K is the most important element. Lisińska & Leszczyński, 1989; Kärenlampi & White, 2009) These valuable traits will not attract consumers, unless potato tubers have a good flavor
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