摘要
【目的】探究川西高原乡土杨树人工林生长规律,为四川乡土杨树的栽培与推广提供科学依据。【方法】采用树干解析法,对伐自川西高原不同地点的5种乡土杨树(川杨、乡城杨、光果西南杨、三脉青杨和康定杨)人工林的生长特性进行研究。【结果】川杨、乡城杨、光果西南杨、三脉青杨、康定杨的树龄分别为26,24,24,26和20年,其树高总生长量分别为28.5,18.2,16.0,16.4和16.2m,胸径生长量分别为33.05,32.66,27.73,33.11和24cm,材积生长量分别为1.027 4,0.652 0,0.375 0,0.546 9和0.306 2m3;树高、胸径与材积的连年生长量均基本表现出先升后降的规律,各树种的树高与胸径连年生长量最大值及出现的时间存在一定差异;数量成熟年龄也存在差异,其成熟顺序依次是光果西南杨、乡城杨、康定杨、川杨、三脉青杨;各树种胸高形数开始时差异较大,但后期基本稳定在0.4左右;胸径、树高、材积的Logistic方程均能很好地反映各树种的生长过程,其回归方程的相关系数都在0.99以上。【结论】川西高原乡土杨树各树种的生长过程存在明显差异,在造林后应依据其生长特性进行抚育管理,以缩短其成材年限。
【Objective】The growth characteristics of native poplar plantations in western Sichuan plateau were studied to provide scientific reference for cultivating and extending native poplar.【Method】The research of forest growth characteristics was conducted on Populus szechuanica Schneid.,Populus xiangchengensis,Populus trinervis,Populus schneideri var tibetica,and Populus kangdingensis in western Sichuan plateau using stem analysis method.【Result】The ages were 26,24,24,26,and 20 years,respectively.Their total tree heights were 28.5,18.2,16.0,16.4and 16.2m,respectively.Their DBH were 33.05,32.66,27.73,33.11 and 24.0cm,respectively.Their tree volumes were 1.027 4,0.652 0,0.375 0,0.546 9and 0.306 2m^3,respectively.The current annual increment of DBH,tree height and timber volume all increased before decreasing.There existed differences in maturity ages and the appearance of maximum growths.The mature sequence was in the order of P.schneideri var tibetica,P.xiangchengensis,P.kangdingensis,P.szechuanica,and P.trinervis.The breast height form factors of different trees were different at the beginning while they kept stable at 0.4in late stage.The established Logistic equations of DBH,tree height,and tree volume could well reflect the tree growth process with correlation coefficients of above0.99.【Conclusion】There existed significant differences in the growth process of different species.Tendingmanagement based on its growth characteristics after afforestation could shorten timber time.
作者
贾晨
辜云杰
何承忠
周安佩
罗建勋
JIA Chen GU Yunjie HE Chengzhong ZHOU Anpei LUO Jianxun(Sichuan Academy of Forestry, Chengdu, Sich uan 610081, China College of Forestry ,Southwest Forestry University ,Kunming,Yunnan 650224,China)
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2017年第2期79-87,95,共10页
Journal of Northwest A&F University(Natural Science Edition)
基金
林业公益性行业科研专项(201104076)
四川省社会公益项目(ZL2013-09)
关键词
川西高原
乡土杨树
生长特性
树干解析
west Sichuan plateau
native poplar
growth characteristic
stem analysis
