火炬松（ＰｉｎｕｓｔａｅｄａＬ．）主根明显且具有深根性。通过截根后，一方面可促使苗木多生侧根，扩大根系吸收面积，提高苗木质量，另一方面，造林时能防止窝根、坐根，提高造林成活率，既能方便操作提高工效，又不增加整地深度。截顶后尚可防止苗期枯梢病流脂等现象 Pinus taeda (Pinus taeda L.) main root is obvious and deep-rooted. By cutting the root, on the one hand can promote seedlings more lateral roots, expand the root absorption area, improve the quality of seedlings, on the other hand, afforestation to prevent nest, root, improve survival rate, both to facilitate the operation to improve work efficiency, and Does not increase the depth of preparation. After truncation can still prevent seedling blight and other symptoms