مطالعه برخی از ویژگی‏های مورفولوژیک سورگوم علوفه‏ای تحت تاثیر کاربرد کود زیستی و محلول‏پاشی عناصر ریز مغذی

To evaluate the effect of Mycorrhiza and foliar nutrition of iron and zinc on morphological characteristics and forage yield of sorghum, an experiment was conducted in Research Farm of the College of Agriculture, University of Tehran (Karaj) in 2011. The experimental treatments were arranged as Split Factorial on the basis of randomized complete block design with four replications. The effect of mycorrhiza (main factor) at two levels and both Fe and Zn foliar application (sub-factors) at 3 levels were evaluated. Dry matter yield, plant height, leaf number and stem diameter were measured for all treatments. The results showed that highest plant height was related to integrated treatment of Mycorrhizal and foliar application in concentrations of 8 and 6 per thousand of Fe and Zn, respectively. Also, plant height increased by increasing concentrations of zinc in foliar application. Furthermore, the highest dry matter yield was related to integrated treatment of Mycorrhizal and foliar application in concentrations of 4 and 3 per thousand of the Fe and Zn, respectively.