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 多用途水溶性植营养素在作为土壤浸润剂和叶面喷施溶液使用时效果。

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，如枫树，桦树和落叶松，则将叶子中糖的含量降低到了极低的水平，并在冬季采取了不生叶的做法，以避免叶面冻伤。