مطالعه رقابت بين ارقام گندم با يولاف وحشي و منداب

Study of competition between wheat (Triticum aestivum) cultivars,Wild Oat (Avena fatua) and Rocket (Eruca sativa)

A field experiment was carried out in 1999 and 2000 in Nieshabour to study of wheat (Triticum aestivum) cultivar competitiveness against Rocket (Eruca sativa) and Wild oat (Avena fatua). In this experiment seven cultivars planted with Rocket, Wild oat and without these weeds (weed free), that arranged in factorial experiment using a RCBD with four replications and 21 treatments. Time of emergence, growth habit, dry matter, stem height growth rate and time that cultivar needed to ʹ/2 maximum height measured. The results showed that cultivars with more tillers, minimum time requirment to1/2 maximum height and early growth prostrate had more competitive ability against Rocket, but with Wild oat, final height was important and more reduced weed dry matter. Rocket and Wild Oat reduced wheat accumulated dry matter from beginning growth season and heading time respectively. High harvest index caused to decrease wheat competitive ability. Rocket decreased plant/m2 and kernels/spike and Wild Oat decreased 1000-kernel weight of wheat.