Erzurum Yöresinde Yonca Ekim Alanlarında Bulunan Yabancı Otlar, Yoğunlukları ve Rastlama Sıklıkları / Species, Density and Frequency of Lucerne Weeds in Erzurum, Turkey

OZET: Erzurum ilinin Askale, Merkez ve Pasinler ilcelerindeki yonca tarlalarindaki yabanci otlarin yogunluklarini, rastlama sikliklarini belirlemek amaci ile 2006-2007 yilinda yurutulen calismada, 2 tohumsuz, 15 tek cenekli (monokotiledon) ve 62 cift cenekli (dikotiledon) olmak uzere 22 familya ve 63 cinse ait 79 farkli yabanci ot turu saptanmistir. Bu yabanci otlarin metrekaredeki yogunluklarinin 1 ile 2965 arasinda degistigi ve ortalama yogunlugun 82.10 bitki/m2 oldugu belirlenmistir. Poa pratensis L. (Cayir salkim otu) 21.96 adet/m2, Poa bulbosa L. (Yumrulu salkim otu) 15.04, Bromus tectorum L. (Puskullu cayir) 11.47, Elymus repens (L.) Gould. (Ayrik) 9.07 ve Carum carvi L. (Kir kimyonu) 3.05 ile en yogun turler olarak belirlenirken, P. pratensis (%32.59), C. carvi (%27.41), B. tectorum (%26.67), Descurainia sophia (L.) Webb. ex Prant (Uzun supurge otu) (%22.97) ve Cardaria draba (L.) Desv. (Yabani tere) (%22.22) ise rastlama sikliklari en yuksek turler olarak tespit edilmistir. Anahtar Kelimeler: Yonca, yabanci ot, yabanci ot yogunlugu, rastlama sikligi, Erzurum ABSTRACT: This study was carried out in order to determine the species, density and frequency of weeds in lucerne in Aokale, Merkez and Pasinler districts of Erzurum between 2006 and 2007 in lucerne fields. According to this study, was carried out 79 different weed species belonging to 63 genus and 22 families (2 cryptogamae, 15 monocotyledoneaus and 62 dicotyledoneaus) were identified. It was varied 1 between 2965 density in square meter of this weeds and identified a density of 82.10 plant/m2 weeds per square meter on average. At the experiment site were determined the most common species Poa pratensis L. (Kentucky blue grass) 21.96 (plant/m2), Poa bulbosa L. (Bulbous bluegrass) 15.04 (plant/m2), Bromus tectorum L. (Downy brome) 11.47 (plant/m2), Elymus repens (L.) Gould. (Quack grass) 9.07 (plant/m2) and Carum carvi L. (Caraway) 3.05 (plant/m2); in addition to this study, the weeds species were determined the most frequency of weed species P. pratensis (32.59%), C. carvi (27.41%), B. tectorum (26.67%), Descurainia sophia (L.) Webb. ex Prant (Flixweed) (22.97%) and Cardaria draba (L.) Desv. (Hoary cress) (22.22%); respectively. Keywords: Lucerne, weed, weed density, frequency, Erzurum