نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، مرکز تحقیقات کشاورزی کرمانشاه، بخش تحقیقات گیاهپزشکی
2 استاد، پردیس دانشکدۀ کشاورزی، دانشگاه تهران
3 استادیار، مؤسسۀ تحقیقات گیاهپزشکی، بخش تحقیقات علفهای هرز، تهران، 5، استادیار، پردیس ابوریحان، دانشگاه تهران
4 استادیار، پردیس ابوریحان، دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to investigating theeffects of crop rotation and applying of herbicides on weed distribution in irrigated wheat fields of Kermanshah province, this study was performed during 2011-2012. Multivariate analysis (RDA) revealed the significant relationship between composition and species frequency and exerted management techniques. The first and second features of RDA indicated 57%, 74.9% and 58.3% distribution variance under the effect of crop rotation, grass herbicides and rotation, and broadleaf herbicides and rotation respectively. The highest effect was for the continuously wheat cultivation which had a positive correlation with the frequency of the weeds including Lolium rigidum, Hordeum spontaneum, Avena ludoviciana, Lithospermum arvense and phalaris brachystachys. Application of the herbicide clodinafop propargyl and rotation between wheat-barley and wheat-sugar beet had a low correlation with grass weeds. The weeds including Sinapis arvensis, Carthamus oxycantha, Vicia assyriaca and Galium tricurnutum in the rotation wheat- barely were not controlled by applying 2,4-D, tribenuron methyl and Sulfosulfurun and had a high density.
کلیدواژهها [English]