利川市红椿林场鹅掌楸生长规律研究

Growth Regularity of Liriodendron chinense in Hongchun Forest Farm in Lichuan City

摘要:

以利川市红椿林场17 a生鹅掌楸为研究对象，通过树干解析对其生长状况进行初步研究，结果表明：17 a生鹅掌楸树高15.50 m，胸径12.90 cm，单株材积0.09091 m3；树高、胸径的平均生长量、连年生长量均出现先增加后减少的生长规律。在15 a时，胸径与树高连年生长量与平均生长量相交。因17 a时材积平均生长量与连年生长量并未出现相交，表明17 a生鹅掌楸处于生长旺盛期。因材积未达到数量成熟，故其主伐年龄暂无法确定。

Abstract:

17-year-old Liriodendron chinense from Hongchun Forest Farm in Lichuan City as the research object, and conducts a preliminary study on its growth by stem analysis. The results showed that its height of 17 year-old tree was 15.5 m, DBH was 12.90 cm, and the volume per plant was 0.09091 m3; the average growth of tree height, DBH, and annual growth all appear to increase first and then decrease. At 15th year, the DHB and its height of the tree intersect with the average annual growth. Because the average volume growth did not intersect with the annual growth at 17th year, it indicated that the 17 year-old L. chinense was in a period of vigorous growth. Because the volume has not reached the maturity of the quantity, the harvesting age of it cannot be determined temporarily.