Folia Horticulturae

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Effect of N, P, K and Zn foliar fertilization on the yield of Catharanthus roseus L. (G) Don.

Barbara Łata, Ała Sadowska

Anticancer Plant Laboratory
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warsaw, Poland

Three series of experiments were carried out to evaluate the effect of foliar fertilization with nitrogen, phosphorus, potassium, and zinc on the yield of raw material and alkaloid content in Catharanthus roseus. In 1990 the plants were grown in unhheated foil tunnels, in 1991 in foil tunnels and greenhouse. The following foliar sprayings were compared with control (without any supplementary fertilization): CO(NH2)2, CO(NH2)2 + Ca(NO3)2, CO(NH2)2 + Ca(H2PO4)2·H2O, CO(NH2)2 + ZnSO4·7H2O and CO(NH2)2 + ZnSO4·7H2O + KCl. In each series of the experiment 7 sprayings were performed. Owing to foliar fertilization, the content of N, P, K, and Zn in leaves increased significantly in comparison with control. Among the elements applied, Zn was absorbed most intensively. The most significant differences caused by foliar fertilization were observed in the yield of dry matter of leaves. In all series of the experiment foliar fertilization resulted in a significant increase in yield. The highest yield of dry matter of raw material (leaves and roots) and the highest yield of alkaloids were obtained as a result of foliar fertilization with amide nitrogen and phosphorus or amide nitrogen and zinc.

Łata B., Sadowska A., 1996. Effect of N, P, K and Zn foliar fertilization on the yield of Catharanthus roseus L. (G) Don. Folia Horticulturae 8/2: 51-58.