تاثير سيستم تك كشتي و مخلوط يونجه يكساله و جو بر عملكرد علوفه ، بذر و ذخير بذري خاك يونجه يكساله

Effects of pore and mixed cropping of annual medic (Medicago scutellata cv. Robinson) with barely on forage yield, seed production and soil seed bank

To evaluate the effects barley of pore and mixed cropping of annual medic (Medicago scutellata cv. Robinson) with barely on forage yield, seed production and soil seed bank, two experiments were simultaneously conducted in Kangavar and Khoramabad during 1382 -1383 growing season. Experimental treatments were arranged as factorial and the data were analysed using a complete randomised block design with three replications. The experimental treatments consisted of harvest systems in two levels: f I (control- no forage harv-- all through the growing season) and T2 (forage harvest on early flowering stage of annual medic). Mixed croppin g systems of MO (bore cropping of annual medic), Ml (mixed cropping of I 0 kg of annual medic and 50 kg of barely) and M2 (mixed cropping of 5 kg of annual medic and 50 kg of barely). Forage harvest significantly reduced total dry matter as well as seed production and soil seed bank in all cropping systems compared to control. Forage and seed production in Khoramabad was significantlly higher than Kangavar because of more favorable climatic conditions. T1MI treatment not only produced more forage than medic sole cropping, but also produced enough seed to support soil seed bank reserves to ensure a successful re-stablishment of medic pasture in ley-farming system.