摘要
研究了转双价基因棉田节肢动物群落的稳定性,并分析了昆虫群落多样性的时间格局。结果表明:4种处理棉田昆虫群落的优势集中性指数由高到低依次为常规用药田、常规棉田、B t棉田和双价棉田,均匀度指数依次为B t棉田、双价棉田、常规棉田和常规用药田,多样性指数依次为B t棉田、双价棉田、常规棉田和常规用药田;害虫亚群落的优势集中性指数高低依次为常规棉田、常规用药田、B t棉田和双价棉田,均匀度指数依次为双价棉田、B t棉田、常规用药田和常规棉田,多样性指数为双价棉田、B t棉田、常规用药田和常规棉田;天敌亚群落的优势集中性指数依次为B t棉田、常规用药田、常规棉田和双价棉田,均匀度指数依次为双价棉田、常规棉田、常规用药田和B t棉田,多样性指数依次为双价棉田、常规棉田、常规用药田和B t棉田。可见,种植转双价基因棉不会降低昆虫群落的稳定性,昆虫群落、害虫亚群落和天敌亚群落的稳定性反而得到提高,害虫种群和天敌种群趋于稳定。
Zhongmiansuo 41 （a transgenic Cryl Ac ＋ CpT1 variety}, Zhongmiansuo 32 （ a transgenlc Bt variety） and Zhongmiansuo 23 （a traditional cotton variety） were grown in a field experiment. No pesticide was applied to the plots of the first two varieties （designated as T1 and T2） while the traditional variety was planted with or wilhout pesticide （ designated as T3 and T4） . Dominant concentration of insect community was the highest in T3 , followed in sequence by T4 , T2 and T1. Evenness index was the highest in T2 , followed in order by T1, T4 and T3, Diversity index was in the order of T2 〉 T1 〉 T4 〉 T3. Dominant concentration of pest subcommunity was in the order of T4 〉 T3 〉 T2 〉 T1, its evenness index was in the order of T1 〉 T2 〉 T3 〉 T4, and its diversity index was in the order of T1 〉 T2 〉 T3 〉 T4. Dominant concentration of the natural enemy sub-community was the highest in T2, followed in order by T3 , T4 and T1 ; its evenness index was in the order of T1 〉 T4 〉 T3 〉 T2 ; and its diversity index was in the order of T1 〉 T4 〉 T3 〉 T2 Such results suggest that the growing of transgenic Cryl Ac ＋ CpTI cotton has not decreased the stability of insect community, pest sub-community and natural enemy sub-community in the field. Instead, it has increased their stability, and the populations of main pests and their natural enemies tend to be more stable.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2006年第1期8-11,共4页
Journal of Southwest Agricultural University
基金
国家863计划资助项目(2001AA212271)
国家十五攻关资助项目(2001BA509B05)
政府间国际科技合作资助项目
关键词
转双价基因棉
节肢动物群落
稳定性
transgenic Cryl Ac ＋ CpTI cotton
arthropod community
stability
