光周期对高山姬鼠的能量收支的影响

In order to understand effect of photoperiod on Energy budget in Apodemus chevrieri,we measured energy budget of Apodemus chevrieri in different photoperiod condition(short photoperiod (8L:16D) , normal photoperiod (12L:12D) and a long photoperiod (16L:8D) ). The results show that: Dry matter intake and Energy intakein Apodemus chevrieri decreased with the amount of daylight,they all arrive tiptop in short photoperiod,they take the second place in normal photoperiod,they are lowest in long photoperiod.In long photoperiod,Digested energy，Digestibility，Metabolizable energy and Assimilation rate of Apodemus chevrieri are lower than which in normal photoperiod; Proportion of energyintake and Urine are lowest in short photoperiod.This indicates that photoperiod is an important environmental factor to affect the energy metabolism of Apodemus chevrieri.