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Bt基因棉和2种常规棉田节肢动物群落结构 和动态规律比较研究
陈海风,周春晓,黄诚诚,陈绍坤,江雨倩,史雪莹,原俊灵,巫厚长
0
(安徽农业大学资源与环境学院,合肥230036;合肥市第三十二中学,合肥 230051)
摘要:
采用田间系统调查和方差分析群落参数对转Bt基因鲁棉研34F1(A)、常规棉苏棉12(B)和中棉19(C)田间节肢动物群落结构和动态变化规律进行了比较研究。结果表明,在全生育期,相对丰盛度害虫类为A( 92.1%)>B( 85.4%)>C( 77.9%),捕食类为A( 1.4%)<B (1.5%)<C (2.8%),中性昆虫类为A( 6.5%)<B( 13.1%)<C(19.3%);A田害虫类物种数为每10株7.3±0.3种,显著低于C田11.3 ±1.3种;A田总群落个体数为每10株21 827.3±7 293.4头,显著高于B田1 2079.0±1 056.7头,极显著高于C田7 302.3±1 423.8头;A田害虫类个体数为每10株20 101.3 ± 4 198.6头,显著性高于C田5 690.6 ± 881.1头;A田捕食类个体数为每10株298.0 ± 12.7头,显著性高于B田185.3 ± 17.4头;A田优势种天敌八斑球腹蛛(Theridion octomaculatum)个体数为每10株33.0±1.0头,显著低于C田45.0±2.6头;A田优势种天敌龟纹瓢虫(Propylaea japonica)个体数为每10株145.6±34.4头,极显著高于B田67.6±7.7头和C田59.3±24.1头;A田目标害虫棉蚜(Aphis gossypii)的个体数量为每10株18 810.6±7 105.0头,显著高于B田9 164.0 ± 786.0头,极显著高于C田4 790.0±890.9头;A田总群落优势集中性为0.745 7±0.041 3,极显著高于B田0.600 1±0.017 6和C田0.485 0±0.019 3;A田总群落多样性为0.589 1±0.080 5,极显著低于B田0.846 1±0.048 7和C田1.072 4±0.053 2;害虫类多样性为0.262 9±0.093 9,显著低于C田0.469 1±0.131 4;A田总群落均匀度为0.176 7±0.022 4,极显著低于B田0.246 5±0.009 3和C田0.307 8±0.014 7。
关键词:  Bt基因棉  常规棉  节肢动物群落  动态
DOI:
基金项目:国家科技支撑计划(2011BAD12B04, 2007BAD87B06), 安徽高校省级自然科学研究重点项目(KJ2010A109)和安徽农业大学大创基金(2012)共同资助。
Structure and dynamic changing patterns of arthropod community in transgenic Bt cotton and two traditional cotton fields
CHEN Hai-feng,ZHOU Chun-xiao,HUANG Cheng-cheng,CHEN Shao-kun,JIANG Yu-qian,SHI Xue-ying,YUAN Jun-ling,WU Hou-zhang
(School of Resources and Environment, Anhui Agricultural University, Hefei 230036;The Thirty-second High School, Hefei City, Hefei 230051)
Abstract:
Using the systematic investigation in fields and community parameters analysis by one way ANOVA, studies for the structure and dynamics of arthropod community in the fields of transgenic Bt cotton Lumianyan 34F1(A), conventional cotton Sumian 12(B) and Zhongmian 19(C) were conducted. The results showed that in the whole cotton growth period, the relative abundance of arthropod sub-communities in pest insects, predators and neutral insects were A(92.1%)>B (85.4%)>C( 77.9%), A(1.4%)<B(1.5%)<C(2.8%), and A(6.5%)<B(13.1%)<C(19.3%), respectively. The pest insect species number of 7.3 ± 0.3 species / 10 plants in A was significantly lower than that of 11.3 ± 1.3 species / 10 plants in C. The individual number of total community in A was 21 827.3±7 293.4 individuals / 10 plants, which was significantly higher than that of 12 079.0±1 056.7 individuals / 10 plants in B and 7 302.3±1 423.8 individuals / 10 plants in C. The pest insect individual number in A was 20 101.3 ± 4 198.6 individuals / 10 plants, which was significantly higher than that of 5 690.6 ± 881.1 individuals /10 plants in C. The predator individual number of 298.0 ± 12.7 individuals / 10 plants in A was significantly higher than that of 185.3 ± 17.4 individuals / 10 plants in B. The individual number of dominant species enemy T. octomaculatum in A was 33.0±1.0 individuals / 10 plants, which was significantly lower than that of 45.0±2.6 individuals / 10 plants in C. The individual number of dominant species enemy P. japonica in A was 145.6±34.4 individuals / 10 plants, which was significantly higher than that of 67.6±7.7 individuals / 10 plants in B and 59.3±24.1 individuals / 10 plants in C. The individual number of target pest insect A. gossypii in A was 18 810.6±7 105.0 individuals / 10 plants, which was significantly higher than that of 9 164.0±786.0 individuals / 10 plants in B and 4 790.0±890.9 individuals / 10 plants in C. The dominant index of total community in A was 0.745 7±0.041 3, which was significantly higher than that of 0.600 1±0.017 6 in B and 0.485 0±0.019 3 in C. The diversity index of total community in A was 0.589 1±0.080 5 , which was significantly lower than that of 0.846 1±0.048 7 in B and 1.072 4±0.053 2 in C. The pest insects diversity index in A was 0.262 9±0.093 9, which was significantly lower than that of 0.469 1±0.131 4 in C. The evenness index of total community in A was 0.176 7±0.022 4 , which was significantly lower than that of 0.246 5±0.009 3 in B and 0.307 8±0.014 7 in C.
Key words:  transgenic Bt cotton  traditional cotton  arthropod community  dynamics

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