给树保暖有用吗?

in #cn5 years ago

2018-12-26_134558.jpg

今天看到公园里面的树被穿上了厚厚的“草衣”,据说是保暖防冻。

但实际有用吗? 网上也查了,有人说没用,有人说有点用。

细想一下:
1,长期看,在周围空气温度很低的情况下,由于树干本身不产生热量,其温度会逐步降低至空气温度,导致无法保暖防冻;
2,如果是短期降温,加上一层草衣,可以延迟树干温度降低速率,有利于保温防冻。

不知能否这么理解。

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