The effect of aqueous extract of mixed crop residues of cover crops on the germination of some weeds

Weeds are important biological constraints in agricultural systems. One of the management methods is the use of plants with a high ability to suppress weeds with allelopathic properties. In order to investigate the effect of aqueous extract on some weeds in the experimental mixed cropping system in the research farm ۲۰۱۹ and seed laboratory of the faculty of agriculture and natural resources of the university of Mohaghegh Ardabili, it was implemented in the form of a completely randomized design with three replications. The results showed that the germination percentage of the redroot pigweed, lamb's quarters, and wild mustard weeds were affected by different concentrations of the aqueous extract of the cover crops mixture, and with the increase in the concentration of aqueous extract of cover crops, the percentage of germination in redroot pigweed, lamb's quarters, and wild mustard decreased. Also, the results showed that in ۱% concentration (۱۰ grams of plant powder in one liter of distilled water), the germination rate of redroot pigweed, wild mustard, and lamb's quarters decreased by ۵۵.۵۱, ۵.۸۶, and ۷۶.۱۸%, respectively. The results of this experiment showed the positive effect of the mixed aqueous extract of Sunnhemp, Oat, Crimson clover, Sunflower, and Cowpea on the germination of these weeds.