The content of macroelements and microelements in the above-ground biomass of amaranth
2002
Gregorova, H. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic))
The content of mineral elements (P, K, Ca, Mg, Na) and microelements (Cu, Mn, Zn, Fe, Cd) in the above-ground biomass of amaranth (Amaranthus hypochondriacus L., the 1008 variety) and their uptake by the stand were studied. Field trials were performed in irrigation-free conditions of south-western Slovakia, at the experimental station of the Slovak Agricultural University in Nitra - Dolna Malanta. Amaranth was seeded in two row spacing (0.250 and 0.375 m) and the plants were tinned to two densities (300 and 400 thousand plants per hectare). Years were found to influence highly significantly the content of mineral elements. The effect of stand organisation (row spacing and density) on the content of mineral elements was not statistically significant. On an average of the experimental years 1994-1996, 1 kg of dry matter of amaranth contained 3.83 g P, 35.18 g K, 18.93 g Ca, 10.45 g Mg, 0.32 g Na, and on an average of 1994-1995 these values were 19.62 mg Zn, 9.83 mg Cu, 105.48 mg Fe, 48.01 mg Mn, and 0.03 mg Cd. At an average of experimental years, the above-ground biomass of amaranth showed an uptake per hectare of 32.7 kg P, 311.5 kg K, 177.8 kg Ca, 92.6 kg Mg, 2.9 kg Na, 178 g Zn, 89 g Cu, 938 g Fe, 455 g Mn, and 0.32 g Cd
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