Influence of selected retardants on the quality of winter wheat grain– Danuta Leszczyńska
Growth regulators, or retardants, play a significant rolein the crop protection system, minimizing the risk of lodging. The phenomenon of lodging contributes to qualitative losses and deterioration of grain quality. In this paper, the effect of retardant type, its rate and date of application, on selected quality features
of winter wheat grain was evaluated. The study was carried out at the IUNG Experimental Station in Osiny with winter wheat cultivar ‘Roma’, grown after root crops. The experiment was conducted on the soil of the good rye complex. The three-year study was conducted using the method of randomized split-plot with a control treatment, in four replications. The formulas of retardants (Cycocel 460 SL – chlormequat and Terpal C 460 SL – chlormequat + ethephon), application date
(full tillering and first and second node stage) and application rate (maximum and minimum recommended by the Institute of Plant Protection) were the test factors. The reaction of wheat to the examined factors depended on the type, rate and timing of retardant application. Statistically significant differences in grain glassiness, gluten quality and the activity of amylolytic enzymes, were found vs. the values of the control sample. The application of retardants had no statistically significant effect on grain bulk density, ash content and total protein and gluten content.
Keywords: winter wheat, retardants, grain quality