بررسي اثرات فاصله رديف و تراكم بوته بر عملكرد و اجزاء عملكرد ذرت سينگل كراس 704 در منطقه ميانه

Effect of row spacing and plant density on grain yield and yield components in maize (cv. SC 704) in Miyaneh

To study the effect of row spacing (45, 60 and 75cm) and plant density (50, 60 and 80 thousand/ha) on grain yield and yield components in maize cv. Sc 704 a field experiment was conducted in Miyaneh in 200 cropping season. This experiment was arranged as factorial-using randomized complete block design with 4 replications. In this experiment, developmental and growth stages, morphological characteristics and ear, and dry weight of different parts of plant, grain yield and yield components and harvest index were measured and evaluated. The results showed that with increasing row spacing, plant dry weight at anthesis stage, thousand kernel weight, grain yield, harvest index and kernel number per ear were significant increased. It was also found that with increasing the plant density, some traits such as leaf dry weight between anthesis and physiological maturity stages, plant dry weight at anthesis and physiological maturity stage, and tassel dry weight at anthesis and physiological maturity stage, and grain yield were significantly increased, however leaf dry weight in transitional stage, stem diameter in physiological maturity stage, grain number per row and plant dry weight in transitional stage significantly decreased with increasing plant density. Interaction effect of row spacing and plant density on stem diameter anthesis stage, and grain yield was significant.