不同施氮量对新两优6号产量因子的影响

【目的】研究不同氮肥施用量对新两优6号产量因子的影响,探索适合广西桂中地区超级稻最佳施氮水平。【方法】2009年,以超级稻新两优6号为材料,进行不施氮（N0）、189kg/ha（N1,比当地施氮水平降低30%）、270kg/ha（N2,当地施氮水平）、351kg/ha（N3,比当地施氮水平提高30%）4个不同施氮处理进行田间比较试验。【结果】施氮处理较不施氮处理产量差异达显著水平;N2较N1的产量差异达极显著水平。各处理的有效穗、理论产量随着施氮量的增加均比对照具有极其明显的优势。【结论】施氮量过多或过少都会直接影响水稻的生长和产量,新两优6号适宜的施氮量为每公顷纯氮270kg。

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.