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蚯蚓卵能不能冻死?
. h) I; v, U" I9 w0 W知否 发表于 2011-1-16 21:21  ! L; L* `, ^+ k8 L3 R1 q/ [
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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. |
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