不同抗性品种稻田稻飞虱及其主要捕食性节肢动物生态位研究

对3个不同抗稻飞虱品种稻田主要捕食性节肢动物生态位研究结果表明，食虫沟瘤蛛Ulmmeliata insecticepes是早稻田稻飞虱的主要捕食性天敌．空间生态位上2个抗性品种以栉齿锯螯蛛Dyschiriognatha dentata Zhu et Wen宽度最大，感性品种以隐翅甲Staphylinidae最大．中抗品种天敌与稻飞虱的时间生态位以及时间-空间二维生态位重叠明显高于抗虫和感性品种中天敌与稻飞虱的重叠，认为中抗品种捕食性天敌能更有效地控制稻飞虱．

The Niches of Rice Planthopper and Its Major Predatory Arthropod in Different Resistant Paddy Fields

The niche of major predatory arthropod on different resistant rice planthopper in three paddy fields were studied, the results showed that Ulmmeliata insecticepes was the key predator of rice planthopper in early rice. The spatial niche breadth of Dyschiriognatha dentata on resistant variety was the highest while that of Staphylinidae was the highest on susceptible variety. The temporal and temporal-spatial twodimension niche overlap value of predatory arthropod to rice planthopper on medial resistant variety was higher than that on resistant rice planthopper and susceptible variety. The predatory of medial resistant variety was more effective to control rice planthopper.