The fluctuation of molybdenum content in oilseed rape plants after the application of nitrogen and sulphur fertilizers
2006
Balik, J.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju) E-mail:[email protected] | Pavlikova, D.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju) | Tlustos, P.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju) | Sykora, K.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju) | Cerny, J.(Ceska Zemedelska Univ., Prague (Czech Republic). Fakulta Agrobiologie, Potravinovych a Prirodnich Zdroju)
The effect of N-S fertilizers on the Mb content in winter oilseed rape plants was investigated in field trials using two treatments of single fertilizer rate in the first spring fertilizer application as follows: 100 kg N/ha (AN) or 100 kg N/ha + 50 kg S/ha (ANS). The yield was higher by 49% when using the AN treatment and by 60% when using the ASN treatment in comparison with control plants (3.7 t/ha). An antagonistic relationship between sulphate and Mb anions was demonstrated concerning their absorption by the plants. Mb concentrations in AN treated plants were significantly higher than those in ANS plants as Mb concentrations (mg/kg) in different parts of rape plants during the flowering period were as follows: 0.21 vs 0.17 in roots, 0.19 vs 0.12 in stems, 2.40 vs 1.56 in upper leaves, 1.72 vs 0.90 in lower leaves, 1.50 vs 1.17 in flower petals. During the flowering period, the above-ground biomass accumulated altogether 8.44 g Mb/ha when AN treatment was used and 6.06 g Mb/ha when ANS treatment was used.
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