Algorithms of thinning simulation for timber plantation - A case study of Chinese fir

作者：Dong Chen; Wu Baoguo^*; Wang Liying; Qi Yan; Han Yanyun

来源：Nature Environment and Pollution Technology, 2016, 15(2): 429-436.

• Chinese fir
• Cunninghamia lanceolata
• Forest harvesting
• Growth and yield models
• Initial density
• Iterative algorithm
• Thinning simulation
• Thinning strategies

Thinning parameters, such as stand initial density, thinning time, number of thinning, thinning interval, intensity, and cutting age, were analyzed;constraints of these parameters were established. Based on these parameters, two algorithms were proposed. One algorithm was used to calculate volume harvest based on thinning parameters to determine the function of the predicted stand volume harvest via various thinning strategies. The other algorithm was used to develop an enumeration iterative algorithm based on the largest volume yield that can be obtained via an optimal thinning strategy. A decision support system of thinning simulation based on these algorithms was developed. Growth and yield models related to Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) were selected as research examples. When the initial stand was 4000 stems per hectare, site index was 16 meters and cutting age was 30 years, the Chinese fir stand can yield at most 906.74 m3/ha and 940.74 m3/ha if thinned once and twice with the corresponding and proposed thinning strategies, respectively.

• 出版日期2016