【摘要】 调查表明荆州涝渍地稻田蜘蛛计 2 4种 ,分属 9科 1 8属 ,蜘蛛在中稻不同生育期的时间生态位及在稻株不同部位的空间生态位均表现出显著差异。 7月中、下旬 ,随着稻飞虱、稻纵卷叶螟虫口密度急增 ,蛛量亦大幅上升 ,至 7月 2 8日达顶峰 ;8月上、中旬 ,第 4代褐飞虱大发生 ,蛛量随之出现一个高峰 ;8月下旬以后 ,中稻成熟 ,褐飞虱种群密度减少 ,蛛量也明显下降。蜘蛛在稻株上的垂直分布多集中在中、下层 ,与上层蛛量分布呈显著相关更多还原

【Abstract】 Investigations in watery and water-logging paddy fields in Jingzhou showed that: 24 species of spiders were found in the fields in total,belonging to 18 genera of 9 families respectively,and both the timing ecological niche of the mid-mature paddy in different development stages and the spacing one on different parts of paddy plants showed significant differences. During middle and late July,the number of spiders increaseed greatly as the population densities of Nilaparvata lugens and Cnaphalocrocis medinalis increased dramatically ,and it reached a peak on 28,July;early and mid-August,the number of spiders showed a peak as the fourth generation of N.lugens happened mostly;When the mid-mature paddy was mature after late August,the number of spiders decreased specifically as the population density of N.lugens decreased. Most spiders of the vertical distribution were found on the middle parts and the lower parts of paddy plants,which were notably relative to the number of spiders on the upper parts.更多还原