杉木林主伐后,常采用栽苗或萌芽进行更新。前者前期生长慢,更新成本高,但是材质好,生长持久后劲足,可成大材;后者前期生长快,更新成本低,但是材质较差,后期生长缓慢,难以成大材。如果采用萌芽加栽苗的更新方式,则可兼有两者优点,实现低投入高产出。其技术要点如下:采伐要求宜在杉木20～30年龄时进行主伐,此年龄段内伐桩萌芽 Cunninghamia forest after cutting, often using planted or sprout to be updated. The former slow growth in the early, the high cost of updating, but the material is good, long-lasting growth potential sufficient, can become a large timber; the latter rapid growth in the early, low update costs, but the material is poor, late growth slow, difficult to become a large timber. If the use of germination and planting seedlings update, you can have both advantages, to achieve low input and high output. The technical points are as follows: Cutting requirements should be 20 to 30 years of Chinese fir when the main cutting, this age segment sprout pile