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不同年龄兴安落叶松树干呼吸及其与环境因子关系的研究
引用本文:姜丽芬,石福臣,祖元刚,王文杰,小池孝良.不同年龄兴安落叶松树干呼吸及其与环境因子关系的研究[J].植物研究,2003,23(3):296-301.
作者姓名:姜丽芬  石福臣  祖元刚  王文杰  小池孝良
作者单位:1. 东北林业大学森林植物生态学教育部重点实验室,哈尔滨,150040
2. 中国科学院地理科学与资源研究所,北京,100101
3. 日本北海道大学演习林,札幌,060-0809
基金项目:中国科学院地理科学与资源研究所创新工程研究项目 (CXIOG- E0 1- 0 6)和 (SJ10G D0 1 0 2 ),国家自然科学基金项目 ( 3 0 0 70 13 3 )资助。
摘    要:采用动态红外气体分析法研究了两个不同年龄兴安落叶松(Larix gmelinii Rupr.)人工林内落叶松树干呼吸速率的季节变化,并分析了树干呼吸速率与环境因子的关系.两个年龄落叶松树干呼吸速率均是从春季到夏季逐渐升高,高峰值出现在7月(成熟林)和8月份(幼林),之后明显下降.幼林落叶松的树干呼吸速率(变化范围是1.99~6.15 μmol*m-2*s-1)显著高于成熟林(变化范围是1.52~3.38 μmol*m-2*s-1)(P<0.05).树干温度对树干呼吸影响较大,树干呼吸速率与树干温度呈指数相关关系;成熟林和幼林树干呼吸的Q10值分别为1.96和3.44.当空气相对湿度较低时,树干呼吸速率与其关系无明显规律,但当空气相对湿度很高时,能大大促进树干的呼吸作用.

关 键 词:兴安落叶松  树干呼吸  环境因子  树干温度  空气相对湿度

STUDY ON STEM RESPIRATION OF LARIX GMELINII OF DIFFERENT AGES AND ITS RELATIONSHIP TO ENVIRONMENTAL FACTORS
Abstract.STUDY ON STEM RESPIRATION OF LARIX GMELINII OF DIFFERENT AGES AND ITS RELATIONSHIP TO ENVIRONMENTAL FACTORS[J].Bulletin of Botanical Research,2003,23(3):296-301.
Authors:Abstract
Abstract:By using a dynamic IRGA method, seasonal changes of stem respiration rate in two larch plantations with different ages were studied. Relationship between stem respiration rate and environmental factors were analyzed. Stem respiration rates of larches of both ages increased during spring and summer, and peaked in July (the mature forest) and August (the young forest). During autumn, stem respiration rates declined sharply. Stem respiration rate of the young larch stand, ranged from 1.99 to 6.15 μmol*m-2*s-1, was significantly higher than that of the mature larch stand, ranged from 1.52 to 3.38 μmol*m-2*s-1 (P<0.05).There was an exponential correlation between stem respiration rate and stem temperature. The temperature coefficient Q10values for stem respiration of the mature forest and the young forest were 1.96 and 3.44 respectively. There was no obvious regularity between stem respiration rate and relative humidity at the lower atmospheric relative humidity,however, stem respiration was apparently promoted at higher relative humidity range.
Keywords:Larix gmelinii  stem respiration  stem temperature  Q10  atmospheric relative humidity
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