【摘要】 为探明施氮量对辽河稻区盐粳系列品种（系）上蚜虫种群发生量及稻米产量的影响，探讨减施氮肥对水稻麦长管蚜的控害效果，比较不同氮肥水平下粳稻的产量关系。结果表明，蚜虫的种群数量随着氮肥水平的提高而增加，减氮25%可有效降低蚜虫种群数量，降低其危害。同时施氮量可显著影响水稻产量构成因素和产量值，减氮25%对水稻产量降低影响不显著。综合评估氮肥用量对水稻产量的影响和蚜虫危害程度，本研究明确氮肥最佳施用量为135 kg/hm~2水平，各粳稻品种（系）的蚜虫种群数量均值较常规施肥田可降低46.33%，各粳稻品种（系）的水稻理论产量均值稳定在718.12 kg/667 m~2，兼顾了虫害防控，稳定了水稻产量和优化了生态效益。更多还原

【Abstract】 In order to investigate the effects of nitrogen application rate on aphid population occurrence and rice yield in Yangeng-series varieties(lines) in Liaohe rice area, to explore the control effect of reduced nitrogen application on rice Macrosiphum avenae, and to compare the yield relationship of japonica rice under different nitrogen fertilizer levels. The results showed that the aphid population increased with the increase of nitrogen fertilizer level, and 25% nitrogen reduction could effectively reduce the aphid population and its harm. At the same time, nitrogen application rate can significantly affect rice yield components and yield value, while 25% nitrogen reduction has no significant effect on rice yield reduction. Comprehensive evaluation of the damage degree of nitrogen fertilizer on rice yield and aphid showed that the optimal nitrogen fertilizer application rate was 135 kg/hm~2, the average aphid population of each japonica rice variety(lines)was reduced by 46.33% compared with the conventional fertilizer field, and the average theoretical rice yield of each japonica rice variety(lines) was stable at 718.12 kg/667 m~2, taking into account pest control, Stable rice yield and optimized ecological benefits.更多还原