【摘要】 采用田间试验法,研究了贵州山区一季中稻稻田养鸭对水稻害虫的控制效果。结果表明:贵州山区一季中稻每公顷放鸭90只,可有效控制稻飞虱的危害。放鸭两周后与对照相比稻飞虱数量下降了44%。但由于试验田稻水象甲幼虫密度低于10头/20丛,稻鸭共育对稻水象甲的控制效果不显著。对群落多样性指数调查表明,放鸭对稻田昆虫物种多样性、物种丰富度和均匀度没有明显影响。更多还原

【Abstract】 Rice-duck farming has a long history in China,we conducted the experiment of rice-duck farming in mountainous rice field to evaluate its control effect on insect pests. The results showed that 90 ducks per hectare in rice-duck farming decreased significantly the population of rice planthopper by 44% in mountainous middle-season rice field. There was no negative effect on rice water weevil larva because of low density of the weevil( below 10 weevils /20 hills) in experiment plot. Rice-duck farming did not affect the diversity index,richness,eveness index of insect community in rice field.更多还原