Relationship between herbicide application and mineral nutrition of sunflower | Povezava med aplikacijo herbicidov in mineralnih gnojil pri soncnicah
2007
Nádasy, E., Deák Ferenc str. 16, 8360 Keszthely (Hungary) | Kazinczi, G. | Nádasy, M.
Soil herbicides can influence directly the emergence and physiological processes of cultivated plants and weeds. These chemicals can also change processes of nutrient transformation, so can indirectly effect on mineral nutrition of plants. The aim of our experiment was to study the effect of different pre-emergence herbicides on mineral nutrition of two sunflower hybrids in a pot experiment. Experiment was set up in greenhouse. We examined changes of nitrogen, phosphorus, potassium and calcium content of Itanol and Rigasol PR sunflower hybrids. The applied herbicides were Afalon Dispersion (linuron), Galigan 240 EC (oxyfluorfen), Pledge 50 WP (flumioxazin), Proponit 720 EC (propisochlor) and Stomp 330 (pendimethalin) with the highest field suggested doses. Plants were grown for four weeks. Thereafter fresh- and dry weights, as well as N-, P-, K- and Ca concentration of shoot samples were measured. We established that fertilizers increased biomass and nutrient content of shoots in every treatment. Herbicides decreased fresh- and dry weight of four weeks age sunflower shoots in different extent, moreover influenced mineral nutrition of two hybrids unequally.
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