| 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16.2 m，胸径生长量分别为33.05，32.66，27.73，33.11和24 cm，材积生长量分别为1.027 4，0.652 0，0.375 0，0.546 9和0.306 2 m3；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。 |
| 关键词: 川西高原 乡土杨树 生长特性 树干解析 |
| DOI： |
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| 基金项目:林业公益性行业科研专项（201104076）；四川省社会公益项目（ZL2013-09） |
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| Growth characteristics of five native poplars in western Sichuan plateau |
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JIA Chen,GU Yunjie,HE Chengzhong,et al
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| Abstract: |
| 【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 xiang chengensis,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 28.5,18.2,16.0,16.4 and 16.2 m,respectively.Their DBH were 33.05,32.66,27.73,33.11 and 24.0 cm,respectively.Their tree volumes were 1.027 4,0.652 0,0.375 0,0.546 9 and 0.306 2 m3,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 0.4 in late stage.The established Logistic equations of DBH,tree height,and tree volume could well reflect the tree growth process with correlation coefficients of above 0.99.【Conclusion】There existed significant differences in the growth process of different species.Tending management based on its growth characteristics after afforestation could shorten timber time. |
| Key words: west Sichuan plateau native poplar growth characteristic stem analysis |
