福建省峦大杉人工林生长模拟及其数量成熟研究

摘要

为研究福建地区峦大杉的生长过程,并确定其数量成熟龄和合理轮伐期.以福建省28年生峦大杉人工林标准木的生长数据,应用系列模型进行树高、胸径和材积生长过程拟合,经优选与验证,筛选出相应的生长模型,并应用材积生长模型进行数量成熟年限分析.结果表明,树高、胸径和材积生长回归方程分别以莱瓦科威克3、苏马克和逻辑斯蒂模型拟合效果最好,模型预测精度均在97% 以上,决定系数均在0.99以上,能够反映峦大杉的生长规律.由峦大杉材积生长模型,并结合两曲线的走势,可知该林分数量成熟龄在32~33 a间.建议峦大杉人工林进行大中径材培育,其合理轮伐期为32 a.%We studied the growth patterns and determine their quantitative maturity and appropriate rotation age of Cunninghamia konishii plantation in Fujian Province.The models of tree height,DBH and volume growth process were fitted by using se-ries mathematical model based on those growth data of 28-a C.koni shii plantation sample trees in Fujian Province.The cor-responding growth model was screened out after optimization and verification,the quantitative maturity was analyzed by using fitting volume growth model.The Levakovic3 model was superior to the growth process of tree height in the C.konishi i plan-tation.The Schumacher model was superior to the growth process of DBH, the Logistic model was superior to the growth process of stem volume,and these growth model displayed good prediction accuracy with the prediction accuracy of above 97%,and with the values of prediction of more than 0.99.The growth models could fit the growth process precisely. Through C.konishii volumn growth model, with the trend of two curves of annual increment and average increment, the quantitative mature age was in 32-33 years old.Therefore,C.konishii should be conducted in large diameter timber orien-ted cultivation,and the rotation of C.konishii plantation is recommended in 32 a after planting.