Role of nano-silicon and other silicon resources on straw and grain protein, phosphorus and silicon contents in Iranian rice cultivar (Oryza sativa cv. Tarom)

In order to investigation of silicon resources on nitrogen and phosphorus uptake on agronomical traits in rice, this experiment was carried out as factorial in randomized complete blocks design with three replications at Sari region, Mazandaran, Iran in 2012 and 2013. Treatments were silicon resources in four levels including calcium silicate and potassium silicate in soil use and Nano-silicon as foliar application and control , the nitrogen application from Urea resource were in two levels including 0 and 70 kg ha -1 and phosphorus application from P2O5 resource also were in two levels, 0 and 200 kg ha -1 .The results showed that the maximum protein content in grain and straw and the maximum silicon content in grains and straw were derived for Nano-silicon foliar application in every two years. In first year the minimum phosphorus content in grains and straw was achieved by Nano-silicon foliar application and control treatment, respectively. Phosphorus use cause to increase phosphorus concentration in grain and straw in every two years, as cause to increase silicon content in grain and straw in second year was. Generally, silicon soil application could increase phosphorus uptake and Nano-silicon foliar application could be increase protein and silicon content of shoot in rice.