辐射松、马尾松、长叶松与晚松人工林的生长规律比较研究

对九峰试验林场的辐射松、马尾松、长叶松及晚松人工林生长规律的研究结果表明 :长叶松生长最慢 ,而不宜大面积发展 ;辐射松、马尾松与晚松均表现较好 ,且辐射松与晚松材积生长速率高于马尾松 ,至 2 2a后 ,辐射松材积的生长速率将超过晚松 ;辐射松 4a时胸径连年生长量最大 ( 1 85cm) ,树高速生期为 1 2～ 1 6a,材积速生期为 1 4～ 1 7a,数量成熟龄在 40a之后 ;马尾松 4a时胸径连年生长量达最大 ( 1 30cm) ,1 3a树高连年生长量达最大 ( 3 5 0m) ,材积连年生长量 2 8a最高 ( 0 0 1 60 1m3) ,数量成熟龄为 35～ 40a ;晚松胸径连年生长量在第 3年达最大 ( 1 85cm) ,平均生长量 9a时达最大 ( 1 0 8cm) ,树高速生期为 3～ 8a ,材积速生期为4～ 1 5a ,数量成熟龄为 2 5a。

Comparative Study on Growth Rules among Plantations from Pinus Radiata,P.massoniana, P.palustris and P.rigida Mill.var.serotina

It was shown by results from study on growth rules of plantations from Pinus radiata, P. massoniana, P. palustris and P. rigida Mill.var.serotina in Jiufeng Forest Test Farm that P. palustris is not suitable for developmental planting in large area and is the slowest growth; but it behaves better for Pinus radiata, P. massoniana and P. rigida Mill.var.serotina in plantation growth, moreover, the growth rate volume for Pinus radiata and P. rigida Mill.var.serotina in volume growth rates are higher than P. massoniana , and the volume growth rate for Pinus radiata are surpassed by P. rigida Mill.var.serotina after 22 years; for Pinus radiata , the current annual increment in DBH reaches the maximum (1.85 cm) at 4 years and fast-growing period of height or volume is 12～16 years or 14～17 years, but the maturity age for the largest volume is over 40 years;for P. massoniana, current annual increment in DBH or height or volume reaches the maximum (1.30 cm or 3.50 m or 0.016 01 m 3) respectively at 4 years, 13 years or 28 years and the maturity age for the largest volume is 35～40 years; for P. rigida Mill.var.serotina , current annual increment in DBH and average increment reach the maximum volumes (1.85 cm) and (1.08 cm) respectively at 3 years and 9 years, but the fast-growing period of height or volume is 3～8 years or 4～15 year respectively, and the maturity age for the largest volume is 25 years.