Effect of different rate of nitrogen application on yield of rice variety Xinliangyou 6.

[Objective]In order to find out the best nitrogen fertilizer application rates for rice variety Xinliangyou 6 in the middle region of Guangxi, the effect of different rates of nitrogen application on yield of rice was studied. [Method]In 2009, a field experiment on super rice variety was conducted with four treatments of different rates of N fertilizer, viz., no N fertilizer (N0), 189 kg/ha (N1, 30% lower than traditional nitrogen level), 270 kg/ha (N2, traditional nitrogen level), and 351 kg/ha (N3, 30% higher than the traditional nitrogen level). [Results]Significant differences in the yield of rice treated N1, N2 and N3 were observed compared to N0. The highest yield was recorded with application of 270 kg / ha N (N2). This treatment also recorded the highest effective panicles, total grains, filled grains, 1000-grain weight and seed setting rate. [Conclusion]The amount of nitrogen fertilizer, higher or lower, affects the rice growth and yield. According to the results of current study, the suitable rate of nitrogen fertilizer for the variety Xinliangyou 6 was 270 kg/ha.