Allelopathic effects of walnut decomposed leaf extract on some physiological traits of wild oat (Avena fatua L.)

In order to evaluate the allelopathic effects of decomposed walnut leaf extract on some physiological traits of wild oat (Avena fatua L.) an experiment was conducted in Shahrekord University in 2010. This experiment was arranged as a factorial experiment with randomized complete block design with three replications in the glasshouse. Factor A included, five treatments of 0, 12.5, 25, 50 and 100 % of walnut decomposed leaf extraction and Factor B included three methods of soil applicant at the in time of planting and soil applicant and spray extraction at the two-leaf stage. In this study, some traits such as leaf area, chlorophyll a and b, crop temperature stability and Leaf protein were measured. The results showed that use of 50 and 100% of extract reduced leaf area and leaf chlorophyll content significantly while the leaf protein content increased. Moreover, soil application of extract, especially in two-leaf stage, reduced leaf area and leaf chlorophyll content significantly. In conclusion, walnuts potentially have the ability to be used in weed management. Furthermore, in compliance with principles of sustainable agriculture, putting this method to use has the least environmental impact.