Accumulation of cyanogenic glycosides in Sudan grass (Sorghum sudanense (Piper) Stapf.) depending on weather conditions

摘要

It was determined the content of cyanogenic glycosides in three varieties of Sudan grass (Sorghum sudanense (Piper) Stapf.) with different origins Kazitachi (Japan), Vercors (USA) and Voronejskaya 9 (Russia) in four growth stage of development of culture (BBCH - 15, BBCH - 17+18, BBCH - 47 and BBCH -63+67).In the years with precipitation and relatively lower average daily air temperatures, the accumulation of cyanogenic glycosides is lower, while in the dry condition, the contents of cyanogenic glycosides in aboveground biomass is higher in the tested varieties Sudan grass.The accumulation of cyanogenic glycosides in aboveground biomass of Sudan grass varieties is in negative relationship (r = -0.881) from rainfall and positive relationship (r = 0.998) than the air temperature, but only in early stages of development of the crop.