LIU Kaixi,ZENG Biao,YANG Taibao,et al.Analysis of Tree Ring Width Index and Its Relationship with NDVI in Qinghua Forest of Chongqing[J].Research of Soil and Water Conservation,2015,22(03):170-175.
重庆青华林场树轮宽度指数分析及其与NDVI的关系
- Title:
- Analysis of Tree Ring Width Index and Its Relationship with NDVI in Qinghua Forest of Chongqing
- Keywords:
- tree ring width; NDVI; climatic factors
- 分类号:
- Q948;P468
- 摘要:
- 利用重庆市东南酉阳土家族苗族自治县青华林场的杉木树轮样本、2000—2010年的MODIS-NDVI数据以及气象资料，对原始轮宽进行标准化处理后采用一次线性拟合与相关分析的方法，分析树轮宽度指数与气候因子、NDVI的关系，探讨揭示树木主干与冠层的关系。结果表明：研究时段内，树轮宽度原始值呈减少的趋势；树轮宽度指数与前一年及当年的气候因子存在不同程度的相关关系，NDVI与同期气候因子呈现显著的相关性；树轮的整轮宽度和早材宽度与前一年NDVI以及前一年7—9月NDVI均呈显著的正相关关系，而树轮的晚材宽度与当年4—5月NDVI呈显著的负相关关系。
- Abstract:
- This study aims at analyzing the relationships between tree ring width index, climatic factors, and NDVI， using MODIS-NDVI data from 2000 to 2010, meteorological data, and fir [Cunninghamia lanceolata (Lamb). Hook] tree ring samples. The tree ring samples were collected from Qinghua forest in Youyang Tujia and Miao Ethnic groups Autonomous County, southwest of Chongqing. Correlation analysis and a linear fitting were used to investigate and reveal the relationship between trunks and canopies. The findings showed that the original value of the tree ring width presented the declining trend during the study period. There are correlations of different levels between climatic factors and tree ring width index. Meanwhile, NDVI and climatic factors in the same periods show the significant correlation. The entire wheel width and earlywood width both have significantly positive correlation with the NDVI of the last year and the NDVI from July to September of the last year, while latewood width and NDVI of April and May in the same years have the significantly negative correlation.
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备注/Memo
收稿日期:2015-01-09;改回日期:2015-02-20。
基金项目:国家基础科学人才培养基金项目（J1210065）；国家自然科学基金项目（40901056）；中央高校基本科研业务费专项资金项目（lzujbky-2013-130）
作者简介:柳凯茜(1989-),女,山西大同人,硕士研究生,研究方向为全球变化与生态响应。E-mail:liukq12@lzu.edu.cn