Does silicon alleviate the injuries of nitrogen deficiency and Fenoxaprop--P--Ethyl herbicide in wheat (Triticum Sestivum, L.)? [electronic resource].

Includes references.

Si application alleviates influence 9f some abiotic stresses on crop plants. Meanwhile, scarce information is avaiable about the significance of Si for helping the plants to overcome the injuries of N deficiency and herbicides pressure. Thus, twoyear 2-field experiments were carried out in wheat. Experiment I involved three Si concentrations (S0ppm, Si250ppm and Si500ppm) and two N levels (N100% andN50%). Experiment II examined four combinations of fenoxaprop-p-ethyl find Sl: fenoxaprop- p-ethyl+SI2sOppm and fenoxaprop-pethyi+ SiSOOppm (each either in sequence or In tank mixture), fenoxaprop-p-ethyl alone, hand weeding and weedy check. Under N deficiency (N50%). Si500ppm increased plant height as compared to the control. No significant differences in SPAD values were detected amongst Si concentrations under each of the two tested N levels. Si can partially alleviate negative N deficiency effect on wheat yield, causing its increase to level obtained under normal N supply. Si has no effect on weed biomass when applied with fenoxaprop-p-ethyl either in sequence or in tank mixing. The m.ost promising treatment for maximizing wheat grail'l yield was the application of 100 kg N ha-1 (N50) J:C fenoxapropp- ethyl+Si250ppm in sequence", which also, In the same time, means reducing both cost of crop production and environment pollution

Summary in Arabic.

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