COMPETITIVE ABILITY IF SOME WHEAT CULTIVARS TO ACCOMPANIED WEEDS AND ITS IMPACT ON YIELD AND YIELD COMPONENT
ANBAR JOURNAL OF AGRICULTURAL SCIENCES,
2010, Volume 8, Issue 4, Pages 352-362
AbstractA field experiment was conducted during 2008-2009 winter season at the farm of Field Crop Sciences Department, College of Agriculture/ University of Baghdad, to identify competitive ability of some wheat cultivars and its impact on yield and yield component. Randomized Complete Block Design in split plot arranged was used. The main plots included weed treatments, weedy check treatment, grass weed treatment, broadleaved weed treatment and weed free treatment, while sub plots included wheat cultivars, Tahaddi, Iraq, Fatah, Abu-Graib 3, IPA 95 and IPA 99. The results showed that the total dry weight of weeds of weedy check treatment was 94.9gm.m-2. Broadleaf weeds consisted 68.8% of total weed dry weights, while grass weeds consisted 31.2%. Wheat cultivars showed differences in their competitive ability, and Iraq cultivar had more stability tolerance to weed competition and recorded least of reduction in weedy treatment 15.7 and 10.5% for number of spikes and grain yield respectively, while weight of 1000 grains was not affected in the presence or absence of weeds. Similar results were obtained with Abu-Graib 3 and Fatah cultivars. IPA 99 showed greater sensitivity to the weed competition which caused reduction 36.2, 2.3 and 44.6% in number of spikes, weight of 1000 grains and grain yield respectively in comparison with other cultivars. It was concluded from the present study that Iraq cultivars had more competitive ability to weeds than other cultivars while IPA 99 had greater sensitivity to weeds competition and therefore this must be considered when Integrated Paste Management would be applied.
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