EFFECT OF FERTILIZATION AND IRRIGATION ON THE MINERAL ELEMENT CONTENT AND AMINO-ACID-COMPOSITION OF PEAS .2. ZINC-COPPER AND COPPER-CONTENT

On lime coated chernozem soil over 1975-83 the effects of fertilization and irrigation were studied for the macro- and microelement content and aminoacid-composition of pea variety IP-3. In this paper the data of zinc- and copper-contents are publicated. Based on the results the zinc-content in the grain yield of pea decreased on the effect of increasing doses of NPK-fertilizers. This effect was more moderate in case of irrigated treatments. The foliage-spraying with the application of medium NPK-doses (N 60, P2O5 90, K2O 106 kg/ha) increased the zinc-content, whereas in higher doses its effect was not considerable any more. Also the manure is of outstanding effect mainly when it is applied together with before-mentioned dose of fertilizers, as in this way the zinc-content in pea reached or even exceeded the level of the absolute control.