Environmental factors influencing seed germination characteristics of vicious weed green foxtail.

[Objective] The paper was to optimize the optimal conditions for seed germination and seedling emergence of green foxtail [Setaria viridis(L.)Beauv.],so as to solve the problem of serious damage caused by green foxtail. [Method] Using the orthogonal test and the LSD method of software SPSS 18.0,with the number of emerged seedlings of green foxtail as the evaluation index,the influencing factors such as pretreatment of green foxtail,earth covering depth,soil temperature and soil moisture content were compared in the test. [Result] These four experimental factors had great impact on seed germination characteristics of green foxtail. The optimal scheme for seedling emergence of green foxtail was as follows: pretreatment of green foxtail for 3 d,earth covering depth 0.5 cm,soil temperature 32 ℃,soil moisture content 15%. The optimum condition was consistent with the actual situation of serious damage of green foxtail (suffering moderate and heavy rainfall after sowing and before seedling of millet). Avoiding sowing millet before moderate and heavy rainfall could effectively control serious damage of green foxtail. [Conclusion] The study provided theoretical support for effective control against the vicious weed green foxtail.