The influence of some heavy metals (Cu, Mo, Mn, Co) and boron on the protein content of fodder cultures and amino acid contents
1994
Kalmet, R. | Kartau, S.
The heavy metals Cu, Mo, Mn, Co and nonmetal B carried into the soil as fertilizers, in case of great shortage of these elements in soil, increase the crude protein content in cereals to a slight degree, the effect is higher in seeds of legumes and in vegetative parts of leguminous plants. The influence of Cu and Mo on the content of crude protein of barley is different, depending both on the element and the variety. The dose of fertilizer in order to get maximum crude protein of cereals is smaller than the dose for getting maximum yield. Cu increases the content of lysine in grasses on the background of nitrogen fertilizer. The essential amino acids in the yields of field crops are increased mostly by Cu, the influence of other elements is varied and depends on the species of the plant. The NPK fertilizers, enriched by heavy metals, have less influence on the content of crude protein of fodder plants and its amino acid content, due to mutual antagonistic effects of these elements. The crude protein content of natural grasses, growing on peat soils, changes less under the influence of Cu. This is due to the species-rich herbage, whereby each species reacts to the copper differently
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