Does Salinity Enhance Allelopathic Effects of Tribulus terrestris L. in Citrullus Vulgaris Schrad. Agroecosystems at Nobaria, Egypt? Experimental Investigation

Field investigations in the summer of 2013 revealed that some undiscovered stressful factors had a significant impact on Citrullus vulgaris growth and yield in the Nobaria district of Egypt. Presumably, the problem was confined to the two combined causes of soil salinity and Tribulus terrestris inhibitory effects (a common weed dominant in C. vulgaris fields in the study area). Weeds are seen to be an important part of natural and agroecosystems, and their allelopathic activity has been linked to their success. Experiments in the field and in the lab were conducted to back up the previous hypothesis. The plant C. vulgaris was found to be harmed by the interaction of the two variables. The phytomass and leaf area index (LAI) of the study plant were considerably lower in the proximity of T. terrestris (bad weed management) than in the vicinity of T. terrestris (excellent weed management). In a laboratory test, the interaction of salinity and allelochemicals watery derived from T. terrestris plants had a significant impact on germination efficiency, hypocotyl-radicle length, and germination index of C. vulgaris when compared to the influence of just one factor. Finally, T. terrestris showed a significant suppressive effect on C. vulgaris growth and yield, which increased with modest or moderate salinity. Importantly, in desert agro-ecosystems, weed control is a critical technique for avoiding a wide range of interactions between crop-weed on the one hand, and weed-external climatic and edaphic factors on the other.

Author(S) Details

S. M. EL-Darier
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

R. S. Youssef
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

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