Radiation use Efficiency in Rice Crops under Different Numbers of Ttillers and Nitrogen Fertilizer Applications

The most important in agricultural activities is the utilization of solar radiation energy, nutrients and water. Plants with enough water and nutrients, Under optimal conditions, nutrition and water are fulfilled, the crop efficient use radiation is determined by the interception of light and the pattern of spread within the plant canopy.Setting number of tillers will affect distribution of radiation in rice. In addition to the radiation use efficiency by setting different number of tillers, nitrogen fertilizer, Urea, is very influential on the growth of plant organs. The aim of the research was to study the effect of different number of tillers and nitrogen fertilizer application on solar conversion energy in rice crops. The research design used a split plot design in which dose of nitrogen fertilizer as the main plot and different number of tillers as subplots. The results showed that urea at doses of 100 and 150 kg ha-1 was able to provide RUE of 1.37 and 1.39%, which is higher than 0 and 50 kg ha-1 .Result conversion efficiency treatment number tillers 10 and 15 per plant is 1.34, increase by 1.37% compare treatment number tillers 5 per plant.