 鲜花( 173)  鸡蛋( 1)
|
蚯蚓卵能不能冻死?6 r. T% {: g, i- m) V) l# }
知否 发表于 2011-1-16 21:21 
+ \. @% c w+ U2 _) C0 ^; Y* c, y. u, t; M
( B4 |% H0 `" H If frozen, earthworms will die. They survive freezing temperatures by going below the frost line in winter to hibernate. Earthworm cocoons, however, are much more tolerant to freezing and worm eggs within a cocoon survive in the soil over winter to hatch in the spring when conditions are right. |
|