阿尔泰山中东部西伯利亚落叶松生长量及其对气候变化的响应研究

摘要/Abstract

摘要： 利用阿尔泰山中东部两个样点(AYS、SYK)的西伯利亚落叶松(Larix sibirica)树轮资料,采用新疆西伯利亚落叶松一元材积式获得1969-2011年材积生长量序列。利用相关分析和回归分析等方法对生长量数据和气象资料进行分析,研究气温要素与生长量的关系及树木生长对气温和降水变化的响应。结果表明:近50 a来,西伯利亚落叶松材积生长量表现出显著增加趋势,且与生长季气温有较好的相关性;与当年6月降水量呈负相关趋势,8月降水量呈正相关趋势;生长季平均气温在19~20.9℃时,西伯利亚落叶松生长量最大;SYK样点西伯利亚落叶松生长对气温变化的敏感性高,气温每升高1℃生长量增加0.936 mm³·棵^-1;AYS样点西伯利亚落叶松生长对气温变化的敏感性较低,气温每升高1℃生长量增加0.661 mm³·棵^-1。

关键词: 阿尔泰山, 西伯利亚落叶松, 生长量

Abstract: More researches have been conducted on tree rings and their responses to climate change,but the researches through the exact tree growth to reflect climate change is relatively rare. Tree ring is just one of the important indices for measuring trees growth,and can not fully and correctly reflect tree growth,therefore,this paper attempts to clarify the response of Siberia and broad-leaved mixed forest to climate change by analyzing the impact of climate change on the growth of Siberian Larch during this period and to provide scientific basis for the management of local forest resources. Two samples(AYS,SYK)of Siberian Larch(Larix sibirica)were adopted at central region of Altay Mountains for annual tree ring sampling data in 2012 and obtained the 1969-2011 tree volume growth sequence using Xinjiang Siberian Larch unary volume equation. Correlation analysis of Siberian Larch growth amount and seasonal temperature data was made with SPSS 19.0 software and the model of Siberian Larch growth and seasonal temperature was established for the response the Siberian Larch growth to temperature change and precipitation change. Results show that:in the past 50 years,Siberian larch wood product growth showed a significant increasing trend and has good correlation with the temperature of the growing season; and then showed negative correlation with the June precipitation,and positive correlation with the August precipitation. When growth season average temperature reached 19-20.9℃,Siberian Larch growth amount is the largest. The sensitivity of Siberian Larch growth to the variation of temperature is high at SYK sample plot,and the net volume growth increases 0.936 mm³ per piece of tree with the temperature increasing 1℃;while the sensitivity of Siberian Larch growth to the variation of temperature is relatively low at AYS sample plot,and the net volume growth increases 0.661 mm³ per piece of tree with the temperature increasing 1℃.

Key words: Altay Mountains, Siberia larch, growth

中图分类号:

Q948.112

黄力平, 高亚琪, 李云, 张同文, 胡东宇, 王蕾. 阿尔泰山中东部西伯利亚落叶松生长量及其对气候变化的响应研究[J]. 干旱区地理, 2015, 38(6): 1169-1178.

HUANG Li-ping, GAO Ya-qi, LI Yun, ZHANG Tong-wen, HU Dong-yu, WANG Lei. Growth of Siberia Larch in the middle east of Altay Mountains and its response to climate change[J]. , 2015, 38(6): 1169-1178.

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