Influence between the Content of Zinc in Leaves and the Biological Manifestations of Eggplant (Solanum melongena L.) in Foliar Spray

Abstract

In 2004 – 2006 at the experimental field of the department of Horticulture at the Agricultural University – Plovdiv at Molic Fluvisols soil, a trial was carried out to evaluate the efficacy of foliar spray on eggplant cv. “Patladjan 12”, grown as mid-early field production. The variants tested were: 1) N0P0K0 – control; 2) N12P6K6 – backgroud; 3) N24P12K12 – background; 4) Fitona 1; 5) Hortigrow; 6) Agroleaf; 7) Kristalon; 8) N12P6K6 + Fitona; 9) N12P6K6 + Hortigrow; 10) N12P6K6 + Agroleaf; 11) N12P6K6 + Kristalon; 12) N24P12K12 + Fitona.; 13) N24P12K12 + Hortigrow; 14) N24P12K12 + Agroleaf; 15) N24P12K12 + Kristalon per da. More intensive assimilation of Zn was established in variant fertilized with N12P6K6 + Fitona. It was established relationship between the zinc content in leaves and the level of productivity, the concentration of photosynthetic pigments, the functional activity of photosynthesis apparatus of eggplant.