杉木是我区主要优良速生用材树种,扩大杉木生产,以适应国家建设和人民生活的需求,是当前的重要任务。过去多营造杉木纯林,由于造林地区立地条件复杂,气候条件多变,致使造林不成林,成林产量不高。营林实践证明,适当混交,能充分利用地力,改善生态环境,提高成林产量。近年来,对杉松、杉禳等混交积累了一定经验,并取得了较好的效果,但对丘陵地泡桐杉木混 Cunninghamia lanceolata is the main species of fine growing timber in our district. It is an important task to expand fir production to meet the needs of national construction and people’s livelihood. In the past, more Chinese fir plantation forests were established. Due to the complex site conditions in the afforestation area and the changing climatic conditions, the afforestation was not a succession and the forest yield was not high. Silviculture practice shows that proper mixing, can make full use of fertility, improve the ecological environment, improve forest yield. In recent years, fir, pine and other mixed have accumulated some experience, and achieved good results, but the hilly Paulownia fir