Farnaz Faraji
Research and development expert of Bazargan Kala Company, Iran.
Title: Effects of Si fertilizer combined with potassium and growth regulator on morphological characteristics related to lodging in rice (Oryza sativa L.) Cultivar
Biography
Biography: Farnaz Faraji
Abstract
Silicon (Si) accumulation differs greatly between plant species because of differences in Si uptake by the roots. The beneficial effects of Si are mainly associated with its high deposition in plants tissues, enhancing their strength and rigidity. In order to evaluate the morphological characteristics and lodging related traits in rice cultivar under different level of Si fertilizer combined with growth regulator and K fertilizer, a field experiment was carried out in randomized complete block design with three replications in 2016 at the experimental farm of Mazandaran, Babolsar, Iran. A high yielding Iranian rice variety, Hashemi, was used for the experiment. Treatments included (Control, Optysil in 3 levels (0.5, 1, 1.5 and 2/1000), K-leaf fertilizer (2.5/1000), Wokozim (0.5/1000), Optysil+K-leaf, Optysil+Wokozim, Optysil+K-leaf+Wokozim). Results showed that large variation among morphological traits was observed. Wall thickness, average diameter and weight of internode per unit length were significantly correlated with breaking resistance and pushing resistance. Furthermore, maximum amounts of these traist were observed in Optysil4+ Wokozim+ K-leaf treatment, so it was known as the most resistant treatment. Also maximum grain yield was observed in this treatment, since lodging is leading to reduction in grain yield up to 50 percent; wider culm diameter, greater wall thickness, and higher weight of internode per unit length are significantly related to yield production by increasing plant lodging resistance. Therefore, we identify Si nutrition as an important target in attempts to improve the agronomic yield of rice.