Evaluation the effect of paclobutrazol on bolting, qualitative and quantitative performance in autumn sown-sugar beet genotypes in Moghan region

Abstract

The response of sugar beet genotypes to different levels of paclobutrazol was studied during 2013-2014 as a split plot based on randomized complete block design with three replications. Treatments were paclobutrazol application at three levels (0, 150 ppm and 300 ppm) as main plots and sugar beet genotypes at six levels (Eudora, Giada, Jawaher, Levante, Vico and (FC607*474)*Pool-PC.F2-HSF60-P.3) as subplots. Bolting percentage, root yield, sugar content, root K and Na contents, amino nitrogen, molasses sugar percentage, gross sugar yield, extractable sugar yield, alkalinity factor, white sugar yield and extraction coefficient were estimated. Results indicated that bolting percentage, bolting height, sugar content, Na content, alkalinity factor, molasses sugar percentage, extractable sugar, white sugar yield and extraction coefficient were affected by the paclobutrazol levels. Overall, results highlighted the positive effects of paclobutrazol on bolting percentage reduction, content sugar and root quality improvement. A significant difference was found sugar beet genotypes in bolting percentage, root yield and sugar content.