摘要
系统调查了有机稻田害虫种群数量动态,并利用相对多度、丰富度、多样性指数和均匀度分析了其群落结构特征和动态。结果表明,有机稻田中害虫29种,稻纵卷叶螟、褐飞虱为优势种群,其优势度指数分别为0.14～0.39和0.15～0.38。随着水稻的生长,有机稻田物种丰富度和多样性指数均呈上升趋势,而均匀度则表现出一定的波动性,同时3个指数均普遍高于同期的常规稻田。此外,在优势种群及其优势度上,有机稻田与常规稻田相比也存在着一定差异。因此,有机稻田的害虫群落结构更合理和稳定,多样性更高,害虫不容易暴发。
The population dynamics of pests were investigated in organic rice fields.Based on the date of relative richness,abundance,diversity index and evenness,the dynamics of community structure was analyzed.The results showed that there were 29 pest species in organic rice fields,which belonged to 7 orders and 14 families.Rice Leaf folder and Brown plant hopper were the dominant species,their dominant indices ranged from 0.14 to 0.39 and from 0.15 to 0.38,respectively.With rice growing coverage,the species richness（S） and the Shannon-Winner＇s diversity index（H＇） were continual increased,whereas the Pielou＇s evenness（J＇） fluctuated in a certain range.And the S,H＇and J＇in organic rice field were generally higher than those in conventional rice field.Furthermore,in organic rice fields comparing in conventional rice field,there were some differents both the dominant species and dominance of rice pests.Therefore,the community structure of rice pests in organic rice field are stabler and more reasonable.The high community diversity could control the burst of rice pests.
出处
《湖北农业科学》
北大核心
2010年第11期2787-2789,2795,共4页
Hubei Agricultural Sciences
基金
广东省惠州市科技计划项目(2007P53)
关键词
有机稻田
水稻害虫
群落
多样性
organic rice field
rice pest
community
diversity
