Response of young implants of carob Ceratonia siliqua L to different concentrations of Olive mill wastewater

 Hasan Alaa-Aldein (1), Talal Amin (1), and Razan Soliman(1) *

(1). Department of Environment and Forestry, Faculty of Agriculture, Tishreen University, Latakia, Syria.

(*Corresponding author: Razan Soliman. E-Mail:

Received: 7/12/2021           Accepted: 25/02/2022


The study was conducted in 2019 in Al-Hinnadi Nursery in order to find out the response of young carob plants at one and three months of age to increasing concentrations of olive mill wastewater (0, 25, 50, 75, and 100%). A completely randomized block design was used in the study. Nitrogen, phosphorous, and potassium ratios in leaves were studied; also some vegetative and root system characteristics were studied. Results showed that most plants treated with concentrations 50, 75, and 100% died at the age of one month; while only the concentration 100% caused death at the age of three months. Little effect of different concentrations was detected in macro elements ratios in plant leaves. The lower concentration (25%) did not affect the length of the vegetative part, root length, or dried weight.  Higher concentrations (50 and 75%) cause a significant decrease in the length of the vegetative part and roots compared to the control treatment. Overall results indicate the possibility of irrigating the carob seedlings in the first month of age with olive mill wastewater at a concentration of 25% without any possible negative effects.

Keywords: Olive mill wastewater, Carob, Macroelements, implants, vegetative and root system.

Full paper in Arabic: pdf