不间伐栽培模式杉木人工林成熟规律研究

Study on Maturity Law of Chinese Fir Plantation under Non-thinning Cultivation

以福建中心产区杉木人工林改进的全林整体生长模型为基础的收获模型和现行经济参数，研究在不间伐栽培模式下不同地位指数级杉木人工林的数量成熟和经济成熟规律．结果表明，数量成熟龄随着地位指数和初植密度的增加而提前；初植密度对林分数量成熟时的平均材积生长量影响不大；内部收益率成熟龄随着地位指数的增加而提前；较稀初值密度（1500株／hm2）的林分具有最大的经济效益．

The yield model, which is based on the Modified Integrated Stand Growth Model (MISGM) in the central growing area of Fujian, and present economic parameters were used in this paper to study the law of quantitative and economic maturity of Chinese fir plantation with different site index class under non-thinning cultivation. the results showed that: the quantitative maturity got earlier as the site index or initial tree planting density increased, the initial tree planting density had not significant influence on the mean annual increment of volume during quantitative maturity, the maturity of internal rate of return got earlier as the site index increased, and the stand of lower initial tree planting density (1500 trees/hm2) had the maximal economic benefit.