不同立地杉木人工林生长过程及模型研究  

Study on growth process and model of Chinese fir plantation in different sites

作　　者：陈振伟 马晓伟[2] CHEN Zhenwei;MA Xiaowei(Hunan Jinghui Agriculture and Forestry Ecological Technology Company Limited,Changsha 410007,Hunan,China;Hunan Academy of Forestry,Changsha 410004,Hunan,China)

机构地区：[1]湖南景辉农林生态科技有限公司,湖南长沙410007 [2]湖南省林业科学院,湖南长沙410004

出　　处：《湖南林业科技》2023年第3期90-95,共6页Hunan Forestry Science & Technology

摘　　要：通过对湖南省双牌县4个林场不同地位指数的杉木人工林胸径开展调查,建立了相应的生长模型,对在不同立地条件下生长的杉木人工林成熟年龄进行预测。结果表明:不同立地条件下杉木人工林生长模型拟合效果最好的均为Logistic方程;杉木胸径连年生长量和平均生长量在生长初期呈逐步增长趋势,达到数量成熟龄时两曲线相交;各地位指数杉木人工林的连年生长量最大值主要出现在中龄林阶段,平均生长量最大值出现在中龄林至成熟林阶段。Based on the investigation of diameter at breast height(DBH)of Chinese fir plantations with different site indexes in four forest farms in Shuangpai County,Hunan Province,the corresponding growth models were established,and the mature ages under different site conditions were analyzed.The results showed that the best fitting effect of the growth model under different site conditions was logistic equation.The annual and average growth of DBH showed a gradual growth trend at the early growth stage,and the two curves intersected at the age of quantitative maturity.The maximum value of current annual increment at each site index mainly occurred in the middle-aged forest stage,and the maximum value of mean annual increment occurred in the middle-aged to mature forest stage.

关 键 词：杉木人工林 地位指数 胸径 生长模型 成熟龄 

分 类 号：S791.27[农业科学—林木遗传育种]