In order to prolong semen preservation and improve pregnancy rate, semen freezing was studied with German shepherd dogs for experimental animals. The semen of f
To investigate the effects of aluminium (Al) exposure on amino acid neurotransmitters, the chickens with different levels of subchronic Al poisoning were estabo
A field experiment was conducted to elucidate the regulation mechanism of different irrigation schedules on population photosynthetic of winter wheat. The exper
Since 2009, the new rural pension insurance in Heilongjiang Province has obtained certain achievements, but the effects are not obvious. Reflection on the devel