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Mitigating the Detrimental Impacts of Nitrogen Deficit and Fenoxaprop-p-ethyl Herbicide on Wheat using Silicon

Saudy, H. S., Mubarak, Manal
Communications in soil science and plant analysis 2015 v.46 no.7 pp. 897-907
crops, field experimentation, grain yield, herbicides, manual weed control, nitrogen, silicon, weeds, wheat
Crop plants treated with silicon (Si) can overcome the injury impacts of several stress conditions. However, scarce information is available about the significance of Si for helping the plants to overcome the injuries of low nitrogen (N) supply and herbicide pressure. A 2-year field experiment was carried out for evaluating four combinations of fenoxaprop-p-ethyl and Si: fenoxaprop-p-ethyl + Si ₂₅₀ₚₚₘ and fenoxaprop-p-ethyl + Si ₅₀₀ₚₚₘ (each either in sequence or in a tank mixture), in addition to fenoxaprop-p-ethyl alone, hand weeding, and weed check under two N levels (N ₁₀₀% and N ₅₀%). Silicon can mitigate the reduction in wheat yield but has no effect on weeds when applied with fenoxaprop-p-ethyl. When adding N ₅₀%, sequential application of fenoxaprop-p-ethyl + Si ₂₅₀ₚₚₘ along with hand weeding and other fenoxaprop-p-ethyl + Si treatments, except fenoxaprop-p-ethyl alone, were the most promising for improving grain yield.