近几年来，我省许多国营林场已进入经营采伐阶段，对于如何提高杉木成熟林的出材率和更新质量，各地采取不同的方式和对策。根据多年实践，杉木皆伐更新的成败，其技术要点是：1．严格控制伐区面积。伐区一般不超过100亩，小块皆伐有利于做好水土保持工作，使森林生态环境不致 In recent years, many state-owned forest farms in our province have entered the operating harvesting stage. Different ways and countermeasures have been adopted for how to improve the timber yield and renewal quality of Chinese fir mature forest. According to years of practice, the success or failure of the fir clear cutting update, the technical points are: 1. Strict control of cutting area. Cutting area is generally not more than 100 acres, small clear-cut is conducive to soil and water conservation work so that the forest ecological environment will not