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在实验室条件下,研究了不同温度(20℃、23℃、26℃、29℃和32℃)和氮肥水平(不施氮:0 kg.hm-2;高氮:250 kg.hm-2)对褐飞虱存活、发育和繁殖的影响和交互作用.结果表明:在20℃~29℃范围内,随着温度的升高,褐飞虱的卵孵化率和若虫存活率提高,卵和若虫历期缩短,成虫寿命缩短,同时产卵量增加;32℃时,褐飞虱卵孵化率和若虫存活率降低、卵和若虫历期延长、成虫生殖力降低;在不同温度下,高氮植株上的褐飞虱卵孵化率和若虫存活率、成虫生殖力均明显高于低氮稻株上的褐飞虱,同时高氮植株上褐飞虱的卵和若虫历期明显短于低氮稻株上的褐飞虱,说明施用高水平氮肥提高了褐飞虱对逆境条件的生态适应性;温度和氮肥对褐飞虱卵存活率、若虫历期和产卵量的交互作用显著,表明全球气候变暖和长期施用高水平氮肥很可能是近年来褐飞虱猖獗暴发的重要原因.
Under laboratory conditions, the effects of different temperature (20 ℃, 23 ℃, 26 ℃, 29 ℃ and 32 ℃) and nitrogen fertilizer level (0 kg.hm-2 without nitrogen application and 250 kg.hm-2 ) On the survival, development and reproduction of N. lugens.The results showed that with the increase of temperature, the hatching rate of eggs and nymphal of N. lugens increased and the duration of eggs and nymphs shortened in the range of 20 ℃ ~ 29 ℃ , Adult life expectancy shortened, while the amount of spawning increased; 32 ℃, the brown planthopper egg hatching rate and nymphs survival rate decreased, eggs and nymphs extend the duration of adult fecundity decreased; at different temperatures, the brown planthopper eggs hatching And nymphal survival rates and adult fecundity of N. lugens were significantly higher than that of N. lugens on low-nitrogen rice plants, and the durations of eggs and nymphs of N. lugens on N. lugens were significantly shorter than those on N. lugens at high nitrogen level, indicating that the application of high-level nitrogen fertilizer The ecological adaptability of brown planthopper (BPH) to stress conditions was also studied. The interaction between temperature and nitrogen fertilizer on the survival rate, nymphs’ duration and fecundity of BPH was significant, indicating that global warming and long-term application of high level of nitrogen fertilizer are likely to be rampant outbreaks of BPH in recent years important reason.