EN
In case of sulphur shortage in the soil that element has a significant impact on yields of plants and their quality. The objective of the work was the impact of sulphur fertilization on content of Mg and Ca in the dry-mass and in yield of dry-mass of potato tuber. Experience in the field of potato head was in the years 2004–2006 by applying different kinds of sulphur (elemental and K2SO4) and rate (0, 25 and 50 kgāha-1). The content of Mg and Ca in the dry mass and Mg content in yield of dry mass of potato tuber was significantly determined by S fertilization. The highest content of Mg and Ca was found when using 25 kg S·ha-1 in elemental kind and 50 kg S·ha-1 in elemental and sulphur kind. Mg content in yield of dry mass of tubers increased S-elemental fertilization regardless of the rate, while this parameter of Ca no depended on S-fertilization. Sulphur fertilization in sulphate kind increased content S-SO4 in the soil, while S-elemental fertilization in rate 50 kg·ha-1 decreased pH value of soil. Negatively correlation was between pH value of soil and Mg content in dry-mass of tuber. Negatively correlation was also between pH value of soil and Ca content in yield of dry mass of potato tubers. In case of sulphur shortage in the soil that element has a significant impact on yields of plants and their quality. The objective of the work was the impact of sulphur fertilization on content of Mg and Ca in the dry-mass and in yield of dry-mass of potato tuber. Experience in the field of potato head was in the years 2004–2006 by applying different kinds of sulphur (elemental and K2SO4) and rate (0, 25 and 50 kgāha-1). The content of Mg and Ca in the dry mass and Mg content in yield of dry mass of potato tuber was significantly determined by S fertilization. The highest content of Mg and Ca was found when using 25 kg S·ha-1 in elemental kind and 50 kg S·ha-1 in elemental and sulphur kind. Mg content in yield of dry mass of tubers increased S-elemental fertilization regardless of the rate, while this parameter of Ca no depended on S-fertilization. Sulphur fertilization in sulphate kind increased content S-SO4 in the soil, while S-elemental fertilization in rate 50 kg·ha-1 decreased pH value of soil. Negatively correlation was between pH value of soil and Mg content in dry-mass of tuber. Negatively correlation was also between pH value of soil and Ca content in yield of dry mass of potato tubers.
PL
W warunkach niedoboru siarki w glebie nawożenie tym pierwiastkiem ma istotny wpáyw na plonowanie roślin i ich jakość. Celem pracy była ocena wpływu dawki i rodzaju siarki na zawartość w suchej masie i pobranie przez plon suchej masy bulw ziemniaka Mg i Ca. Doświadczenie polowe z ziemniakiem prowadzono w latach 2004–2006, stosując różne rodzaje siarki (siarka elementarna i K2SO4) oraz dawki (0, 25 i 50 kg·ha-1). Aplikacja siarki istotnie wpłynęła na zawartość Mg i Ca w suchej masie bulw i zawartość Mg w plonie suchej masy bulw. Największą zawartość Mg i Ca stwierdzono po zastosowaniu 25 kg S·ha-1 w formie elementarnej i 50 kg S·ha-1, bez względu na formę. Wpływ na zwiększoną zawartość Mg w plonie s.m. bulw miało zastosowanie siarki elementarnej bez względu na formę, natomiast cecha ta w przypadku wapnia nie zależała od nawożenia siarką. Nawożenie siarką w formie siarczanu bez względu na dawkę zwiększało zawartość formy przyswajalnej SO4 w glebie, natomiast siarki elementarnej, zwłaszcza w dawce 50 kg·ha-1, wpływało na obniżenie odczynu (pH) gleby. Ujemna korelacja wystąpiła pomiędzy odczynem gleby (pH) a zawartością Mg w suchej masie bulw oraz pomiędzy pH gleby a zawartością Ca w s.m. i w plonie s.m. bulw ziemniaka.