养分通过皮从根部到达树梢，环剥让养分上不去。老家曾有大树被牛擦死的，牛系在树下，用树干擦痒，结果把一圈皮全擦掉，树就死了

来源: 方外居士于 2025-05-18 09:04:35 [旧帖] [给我悄悄话] 本文已被阅读：次

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