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Trends in Applied Sciences Research
Year: 2008  |  Volume: 3  |  Issue: 2  |  Page No.: 142 - 153

Chemical Fertilizers Could Offer a Real Solution for Minimizing over Consumption of Herbicides for Controlling Weeds in Faba Bean (Vicia faba L.)

Tarek A. El-Shahawy    

Abstract: This experiment was designed to study the suspected effect of the different fertilizers on enhancing the herbicidal efficacy of certain herbicides for controlling weeds in faba bean. Two greenhouse trials were conducted in this regard. Two herbicides (bentazon and fluazifop-P-butyl) and three fertilizers (urea, diammonium phosphate and super phosphate) were my tools of the study. The two herbicides were applied subsequently in combination with the different fertilizers at different rates of concentration (0.288, 0.403 and 0.576 kg a.i. ha-1 bentazon; 0.151, 0.300 and 0.451 kg fluazifop-P-butyl). The fertilizers were in 0.75 and 1% of the total solution at the basis of NP active composition. Applying the two herbicides alone at the recommended doses was good enough for controlling both types of weeds, broad and narrow leaved ones. However, using both of them in combination with the different fertilizers (i.e., urea and diammonium phosphate) was much more effective. The 1% addition was almost the best. Applying bentazon and fluazifop-P-butyl in combination with urea gave, to a large extent, similar results to those applying under diammonium phosphate addition, either for controlling weeds or increasing yield productivity. Super phosphate-fertilized herbicides were the lowest in comparison; virtually not recommended as in opinion of mine. The crop growth was positively affected in response, recording the best results with applying the two herbicides in combination with urea and diammonium phosphate too. The seed content of NPK elements was also significantly increased. In conclusion, using herbicides in aid of fertilizers is highly recommended and 1% addition is to be the best. To be used precisely at the moderate concentration and in combination with urea or diammonium phosphate is the best chosen overall not only for controlling weeds and increasing yield productivity, but also for preserving our health and environments from overdoses of herbicides consumption.

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