مطالعه شاخص های فیزیولوژیکی رشد در ارقام مختلف گندم

n order to study physiological growth indices in different wheat cultivars, an expriment was conducted in 2007-2008 at Khorassan Razavi Agricultural and Natural Resource Research Center, with a split plot layout in RCBD design and 3 replications. Fertilizing time (in four levels i.e. without ZnSo4 fertilizer as control and fertilizing at Planting, stem elongation and anthesis) and cultivars (in 10 levels i.e. Bezostaya, Sabalan, Navid, Zarrin, Alvand, Mahdavi, Azar2, Gaspard, Gascogen and C-81-10) were considered as main and subplot respectively. Results showed that fertilizing time had not significant effect on measured traits. The lowest LAI,NAR, CGR, TDM and grain yield were obtained in Bezostaya and their highest were in Gaspard and Gascogen cultivars.
Correlation coefficients showed that in these cultivars, higher source strength (due to LAI or NAR increasing) followed by higher CGR was the main reason of grain yield increasing.