The effects of interspecific competition on the population dynamics of four insect grain Insecp pests （ Sitophilus zeamais, Rhizopertha dominica, Tribolium castaneum and Cryptolestes ferrugineus ） was studied at 30℃, 75% relative humidity. A regression analysis of the population dynamics was conducted. The results showed that population growth of S. zeamais , R. dominica, T. castaneum and C. ferrugineus was restrained under mixed rearing. Population growth of T. castaneum and C. ferrugineus was remarkably accelerated when they coexisted with S. zeamais or R. dominica, while that of S. zeamais and R. dominica was restrained to some extent. Regression analysis results showed that the population growth potential of S. zeamais was the largest and that of C. ferrugineus was the smallest, and the changing trends of population growth rates were not distinct.
目的：观察温敏型水凝胶加载基质细胞衍生因子-1（stromal cell-derived factor-1,SDF-1）的体内外释放性能及对造血组织的影响。方法：（1）体外释放：用壳聚糖/明胶/甘油磷酸钠（chitosan-gelatin-glycerol phosphate,CS/G/GP）加载经125I标记的SDF-1并通过γ探测仪测量其体外释放率。（2）体内释放：注射该缓释系统到18只SD大鼠股骨干中,在第1~6天（每天3只）收集注射侧股骨头、股骨干、周围肌肉组织及对侧股骨头,测量其释放量。（3）骨髓造血：将10只SD大鼠随机分为2组,实验组注射0.1 ml CS/G/GP加载SDF-1入5只大鼠股骨干,对照组注射0.1 ml CS/G/GP入5只SD大鼠股骨干中。在第7天处死10只大鼠收集注射侧股骨头行活检,观察造血活跃程度。结果：根据γ探测仪测量值获得该缓释系统加载SDF-1的体外及骨髓内释放曲线。实验组骨髓造血活跃程度明显高于对照组,两组间造血面积差异有统计学意义（P〈0.05）。结论：加载SDF-1的可注射温敏型水凝胶第2~5天在股骨头局部维持稳定浓度且活跃骨髓造血组织。
