Fertilum all-purpose, water-soluble plant food works best when it's used both as a soil drench and dissolved as a foliar spray.

Fertilum 多用性植物营养素在作为土壤浸润剂和叶面喷施液使用时效果最佳。

But other species, like maples and birches and larches, combine a less extreme level of sugar in their leaves with the practice of going leafless during the winter to avoid foliar frostbite.

但是其他物种，例如枫树，桦树和落叶松，则将叶子中糖分的含量降低到了极低的，在冬季采取了不生叶的做法，以避免叶面冻伤。