With the decrease of overwintering bee colony, its center temperature and relative humidity ranged widely ,and stably descended.

• 结果表明 ；中蜂越冬蜂团中心温度与外界环境温度日变化同步 ；伴随着越冬蜂群群势下降 ；越冬蜂团中心温度和相对湿度波动范围增大 ；蜂群越冬稳定性下降 .