论文部分内容阅读
通过野外调查,对粳籼89、七桂早、七袋占3个不同抗性品种水稻田中捕食性节肢动物群落的结构、动态等方面进行了研究。结果表明:水稻品种抗性对捕食性节肢动物群落结构的影响不显著。高抗虫性品种样田中节肢类捕食性天敌的迁入虫口密度和总的虫口密度相对较低,群落物种丰富度、多样性、均匀指数也呈下降趋势。中抗品种与天敌群落的共同作用,能有效地控制稻飞虱的数量。中抗品种稻田中天敌群落的迁入虫口密度和总虫口密度都高于感性样田和高抗样田,天敌群落的物种丰富度、多样性和均匀性高于抗性样田。中抗品种与天敌群落间可能存在协同性
Field investigation was conducted to study the structure and dynamics of predatory arthropod communities in three rice varieties with different resistant varieties, ie japonica rice indica 89, Qijiangzao and Qibao. The results showed that the effects of rice variety resistance on the community structure of predatory arthropods were insignificant. The insect population density and total population density of arthropod predators in field samples with high insect resistance were relatively lower, and the species richness, diversity and evenness index of the community also showed a decreasing trend. The combination of medium resistant varieties and natural enemy communities can effectively control the number of planthopper. Insect population density and total population density of mid-resistant rice fields were higher than those of sensitive and high resistance fields, and the species richness, diversity and evenness of natural enemy community were higher than that of resistant ones. There may be synergies between the resistant varieties and their natural enemies