The effect of graded doses of selenium in the soil on yield-forming parameters and Se content in potatoes
2007
Juzl, M.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Hlusek, J.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin | Elzner, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Pestovani, Slechteni Rostlin a Rostlinolekarstvi | Losak, T.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin
In 2004 and 2005 we explored the effect of graded doses of Se in the soil (0, 12, 24, 48 and 72 kg Se/ha) on yield-forming traits (total plant weight, number of stems per hill, number of tubers per hill and hectare yields) in two varieties of potatoes (Karin and Ditta) with different vegetation periods. Se concentration was monitored in potato tubers and tops. Sodium selenite was applied into the soil before planting the potatotes and samples were taken after 90 and 99 days of vegetation (var. Karin and Ditta, respectively). Increasing doses of Se had a negative effect on most of the yield-forming traits. Potato yields, numbers of tubers and total plant weights decreased with increasing Se doses. Se concentrations in different plant parts increased with increasing Se concentrations in the soil. After the application of the highest Se dose (72 kg Se/ha) Se concentration in tubers (4.13 mg Se/kg of dry matter) was as much as 20 times higher than that of controls (0.22 mg Se/kg of dry matter).
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