M-57-01 اثرات فاصله رديف و ميزان بذر برروي عملكرد و اجزاي عملكرد دانه گندم لاين اميدبخش

Effect of row spacing and seeding rate on yield and yield components of promising wheat line M-75-10

In order to study the effects of row spacing and seeding rate on yield and yield components of promising wheat line (M-75-10), an experiment was conducted in the field of Seed and Plant Improvement Institute in Karaj region in cropping season of the year 1999-2000. A strip-plot design based on randomized complete block design was used three replications. Three row spacing (12.5, 15.6 and 18.7 cm) and seven seeding rates (310, 320, 330, 340, 350, 360 and 370 seeds/m^2) were randomized to the vertical and horizontal plots respectively. The maximum grain yield was obtained from the lowest row spacing (12.5 cm) due to more homogeneity in plant distribution with lower row spacing and closing to square planting. Correlation between yield and yield components showed that number of spike/m^2 had the main effect on increasing grian yield and row spacing had significant correlation with number of spiklet per square unit. Number of spike per square and biomass increased with increasing seeding rate whereas spike length and number of spiklet per spike were reduced. The results showed that the best seeding rate for obtaining optium grain yield was 340 seeds per square meter.