THE IMPACT OF THE SOIL CONDITIONER UGMAX ON SELECTED QUALITATIVE CHARACTERISTICS OF POTATO TUBERS
Applied Ecology and Environmental Research
Zarzecka et al.: The impact of the soil conditioner UGmax on selected qualitative characteristics of potato tubers -39 -APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 16(1):39-50. Abstract. A field experiment was carried out in 2008-2010 on soil of a very good rye complex. The soil reaction ranged from slightly acidic to acidic (pH in 1 n KCl was 4.81-5.91), and the soil was very suitable for potato cultivation. The experiment was arranged as a two-factorial split-plot design with three replicates.
... h three replicates. The trial included the following two factors: Itwo edible potato cultivars (Satina and Tajfun), IIfive UGmax application methods (1. control without UGmax, 2. UGmax applied prior to tuber planting at the rate of 1.0 dm 3 ha -1 , 3. UGmax applied prior to tuber planting at the rate of 0.5 dm 3 ha -1 followed by two foliar applications at the rate of 0.25 dm 3 ha -1 , 4. UGmax applied prior to tuber planting at the rate of 1.0 dm 3 ha -1 followed by two foliar applications at the rate of 0.5 dm 3 ha -1 , 5. two foliar applications of UGmax at the rate of 0.5 dm 3 ha -1 ). Random tuber samples from 10 plants were collected in each plot, and used to conduct chemical analysis and assess tuber consumption-related characteristics. The soil conditioner UGmax beneficially affected tuber content of starch and vitamin C, and slightly enhanced after-cooking darkening compared with control tubers. Weather conditions in the study years significantly affected dry matter, starch, and vitamin C content as well as raw flesh darkening and after-cooking darkening of tubers. Under the weather conditions in 2010, when precipitation was abundant, the contents of the components studied were the lowest but raw flesh darkening and aftercooking darkening were more intense due to a higher accumulation of reducing sugars.