ISHS Acta Horticulturae 807: International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild Winter Climate
GROWTH OF CROTON (CODIAEUM VARIEGATUM BLUME) IN SUBSTRATES AMENDED WITH ZEOLITIC TUFF AND IRRIGATED WITH WASTEWATER |
| Authors: | N.S. Karam, M.J. Mohammad, M.Z. Jabr |
| Keywords: | phillipsitic tuff, soilless media, salinity |
| Abstract:
Croton cv. Petra was grown in peatmoss-perlite (PP), singly or with zeolitic tuff (PPZ). The plants were irrigated with tap water or wastewater alone or containing (ppm) 100N-44P-83K or 200N-88P-166K. Results indicate that fertilization increased node and leaf number and wastewater supplemented with 200 ppm N increased shoot weight. Maximal tissue N was for PP receiving wastewater or 200 ppm N and for both substrates receiving 100 ppm N through wastewater or 200 ppm N through tap water. Tissue P was maximal for 200 ppm N applied through wastewater to PP or through tap water to PPZ. Fertigation of PP with 100 ppm N through wastewater or 200 ppm N through either water quality resulted in maximal tissue K. Substrate EC, N and P were maximal in PP receiving 200 ppm N and minimal in non-fertilized PPZ, while K was maximal in PPZ receiving 200 ppm N and minimal in non-fertilized PP. | |
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