不同种植方式下转Bt基因水稻对稻田节肢动物群落的影响

如何设置庇护所使其在转基因作物靶标害虫抗性治理中达到更高的效率，就此，本文 研究了Bt水稻与非Bt水稻不同种植方式对Bt稻田节肢动物群落的影响。结果表明，整体上，块块种植和列列混栽方式对Bt稻田节肢动物群落多样性、均匀度和优势集中性无显著影响；但混栽方式下的Bt稻田节肢动物群落个体密度和物种丰富度显著偏低。在水稻发育中期，混栽方式下Bt稻田节肢动物群落季节动态与块块种植方式下的明显不同，其多样性、均匀度、优势集中性指数均类似于同种植方式下非Bt稻上各参数的季节动态。混栽方式下的庇护所效应更明显。

Difference of arthropod communities in Bt rice paddies under different cropping patterns

In order to evaluate the effect of the cropping pattern applied refuge on arthropod community in Bt rice paddy, the survey was conducted with the block cropping pattern, in which the block of refuge was along side the block of Bt rice, and the mixed cropping pattern, in which rows of refuge was planting within rows of transgenic Bt rice. The results showed that there was no significantly difference in diversity, evenness and dominant concentration of arthropod communities between two cropping patterns during the whole period of rice growth, but the species richness and individual density of arthropods in the mixed cropping pattern were significantly lower than those in the block cropping pattern. Furthermore, the dynamics of diversity, evenness and dominant concentration of arthropod community in Bt rice paddy under the mixed cropping pattern were remarkably different with those under the block cropping pattern, but similar to those in non-Bt rice refuge during the middle period of rice growth. This suggests that the mixed cropping pattern is more effective than the block cropping pattern.