بررسی اثر آللوپاتی گیاهان چغندرقند، کلزا و افدرا بر جوانه زنی و رشد علف‏شور(Salsola dendrites)

In order to evaluate the allelopathic effects of aqueous extract of sugar beet, canola and ephedra on germination and seedling growth of salsola (Salsola dendrites) an experiment based on completely randomized design with four replications was conducted under laboratory conditions in 2013, College of Agriculture, Shirvan. Treatments were: control (distilled water), 5 %, 10 %, 15 %, 20% and 25% aqueous extract concentrations of sugar beet, canola rape and ephedra each separately. The results show that concentration aqueous extract significantly affected seed germination, rate of germination and seedling growth of salsola. Ephedra extract was more inhibitory to seed germination and seedling growth than canola and sugar beet. Seed germination of Salsola dendrites was significantly decreased by 7/5 and 100 percent at 5 and 20% ephedra extract concentration, respectively than control, while canola and sugar beet extract reduced the weed seed germination by 46/5 and 91 percent respevtively at 20% concentration. Low extract concentration (5%) of ephedra, sugar beet and canola decreased the shoot length of salsola by 9, 19.6 and 2/8 percent respectively, while high extract concentration (25%) of ephedra, sugar beet and canola decreased the shoot length by 100,100 and 66/4 respectively than control. Ephedra extract was more inhibitory effect to root growth than shoot growth of salsola seedlings.