Ecological safety assessment of arthropod community in the stands of transgenic hybrid poplar 741 carrying two insect-resistance genes——Impacts of transgenic insect-resistance hybrid poplar 741 on vertical structure of arthropod community

The vertical structure of arthropod community were investigated in transgenic insect-resistance hybrid poplar 741 stands. The results are as follows: In different strains of transgenic insect-resistance hybrid poplar 741 stands, vertical structure of the arthropod sub-community on the tree and in the soil had a higher insect-resistance sensitivity to the insect-resistance genes, and superior to the CK. The structure of high insect-resistance strains sub-community was more rational, and the surface layer and the bush-grass layer arthropod communities had high diversity and uniformity index and a stronger stability, but a low dominancy concentration index. The communities of 3 transgenic insect-resistance hybrid poplar 741 strains had no obvious variance. So, transgenic insect-resistance hybrid poplar 741 showed positive effect on vertical structure of arthropod community.