COMPETITIVE ABILITY OF SOME SOYBEAN GENOTYPES AND THEIR IMPACT ON INHIBITION | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 19, Issue 2, April 2014, Pages 0-0 | ||
| Authors | ||
| F. T. Al-Chalabi; J. M. Al-Jumailly; A. L. M. Al-Kaisy | ||
| Abstract | ||
| A field experiment was conducted at a field located in Al-Anbar province during 2010 and 2011 seasons, to evaluate the potential variations of some soybean cultivars to competitive ability of accompanied weeds and its impact in reducing environmental contamination with herbicides The experiment was accomplished using randomized complete block design (RCBD) in split- split plot arrangement with three replicates. The study involved four different weed treatments (weedy, weed free, herbicide spray at recommended and half recommended concentration) as main treatments, whereas, sub plots involved two crop densities (400000plants.ha-1) and (266666plants.ha-1). Sub-sub plots treatments comprised four soybean cultivars (Ls 75, Lee 74, G 111 and G 35). Results revealed that soybean cultivars, G111showed superior ability in leave aria index and reducing weeds density (19.61 and21.66plant.m-2) and greater percentage of weed control (47.28 and 46.85%) and also greater reduction in its dry weights as compared with other cultivars under study. However, weed density significantly decreased and highest leave aria index withe highest density (D1) comparing with lowest density (D2) during the same period 30 days after sowing in both seasons. Herbicide treatment at recommended concentration achieved least mean of weed density (27.86 and 27.38 plants.m-2 for both seasons, respectively) as compared with weedy treatment which recorded highest means (50.35 and 48.25 plants.m-2 for both seasons, respectively). Herbicide treatment at the recommended concentration achieved highest percentage of weed control (43.37 and 44.54%) and decreased weed dry weights. It was concluded that G111 gonotype caused reduction in weed densities and greater percentage in weed control almost similar to that caused by herbicide applied at recommended concentration and thus may reduce environmental contamination with herbicide. | ||
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