Evleen Farha *(1), Hassan Aladin (1), Muhammad Manhal Alzoubi(2), and Suzan Abdullah (3)
(1) Department of Forestry and Environment, Faculty of Agriculture- Tishreen University, Latakia, Syria
(2) Natural Resources Research Department, General Commission for Scientific and Agricultural Research, Damascus
(3) Department of basic science- Faculty of Agriculture, Tishreen University, Latakia, Syria.
(*Corresponding author: Evleen Farha, E-Mail: evleenfarha@gmail.com,).
Received: 1/02/2021 Accepted: 3/10/2021
Abstract:
The chemical composition of the leaves of about one-year Jatropha curcas L. was studied (one-week age of the young leaves and two months age of the large ones). The plants were cultivated in three different environmental conditions in the Tartous governorate. Results showed a higher percentage of major elements of potassium (K) and phosphorous (P) and a lower percentage of manganese (Mn) of micronutrient elements in the young leaves compared to large leaves. It was also noted that all leaves were free of zinc. The average leaf content (%) of nitrogen, phosphorous, potassium was (1.52/ 0.42/ 2.06), (1.55/ 0.28/1.88), (1.41/0.35/1.89) and iron, copper (mg/kg) was )76.03/137.28), (79.21/ 59.64), (83.62/ 98.94) at the Al-Thawra agricultural site, al-Qamsiyah and Sourani respectively. There were no significant differences in the content of the young leaves of the mineral elements among the three fields, while it appeared significant differences in the content of the large leaves of some mineral elements. The mean percentages of chlorophyll a, b, and carotene (μg / g) were 639.5, 377, and 33.4 respectively for large leaves and 677.1, 406.8, 34.8 respectively for young leaves.
Key Words: Jatropha curcas L., Leaves, Major Elements, Chlorophyll.
Full paper in Arabic: pdf