The allelopathic effects of wild Rye(Secale cereal L.) shoot (above ground part) on some wheat morphological characters,wheat dominant weeds,and the subsequent effects on winter wheat yield

In modern agriculture , herbicides use is on of the important principles; but using allelopathic materials in weed control can reduce the toxic pressure on environment. In this Research, the allelopathic effects of above ground parts of Rye was studied on some morphological characters of Wheat, Rye, Oat and Phalaris as dominant weeds in winter wheat field; in a complete randomized block design(CRBD), with 5 treatments and 4 replications. The treatments were: water extract of Rye above ground part with concentrations of 1.5, 3, 6, and 9 g /li. The results showed the water extract affected significantly at all levels of the trails. Germination was reduced 58.15% and the maximum germination reduction was 70.9% compared to control. Root length percentage was 62.3 %, and Maximum root lenght reduction was 70.8 % compared to control. Shoot length percentage was 61% and the maximum shoot length reduction was 68.3% compared to control. And delay in germination was obtained at least 5.6 days and it maximum of 6.24 day. The results also showed that germination and growth of Wheat, Rye, Oat and Phalaris was significantly affected by rye above ground part. This inhibitory effect of rye can be used for weed control during the fallow season.