松针,是松属、云杉属和冷杉属等常绿针叶林的某些树种,经林业部门进行主伐、间伐和抚育采伐后残留下来的大量枝梢、针叶等剩余物,即松针资源。近年来,我国林业科研部门,为了合理利用森林资源,变废为宝,首先对松针资源进行了开发利用的研究,并已制成新的林业化工产品——“松针粉饲料添加剂”。这对开 Pine needles are some species of evergreen coniferous forests, such as Pinus, Picea, and Abies. After the forestry department carries out the main cutting, thinning and nurturing of a large number of shoots left after harvesting, leaves and other residues, namely pine needle resources . In recent years, China’s forestry research departments, in order to make rational use of forest resources, turning waste into treasure, the first study of the development and utilization of pine needles resources and has made a new forestry chemical products - “pine needles powder feed additives.” This is open