| 不同桤木品系蒸腾速率动态特征及差异性研究 |
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| 引用本文： | 周小玲,徐清乾,许忠坤,喻武,董春英. 不同桤木品系蒸腾速率动态特征及差异性研究[J]. 湖南林业科技, 2011, 38(6): 3-10 |
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| 作者姓名： | 周小玲 徐清乾 许忠坤 喻武 董春英 |
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| 作者单位： | 1. 湖南省林木无性系育种技术实验室,湖南长沙410004;湖南省林业科学院,湖南长沙410004
2. 西藏农牧学院,西藏灵芝,860000 |
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| 基金项目： | 国家林业局项目（2005长江-2）; 国家“十一五”重点工程科技支撑项目（2006BAD03A16-02） |
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| 摘 要： | 对桤木品系蒸腾速率动态特征及差异性研究结果表明:①四川桤木品系苗木上、下部叶的蒸腾速率(Tr)日变化有单峰与双峰两种类型,而下部叶以单峰型曲线为主.②四川桤木属轻蒸腾午休型、耗水型植物,对水分要求较高,在引种过程中,应注意引种地的降水条件和土壤水分条件.③树冠上、下部叶、各品系之间和月份间的蒸腾速率(Tr)差异极显著....
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| 关 键 词： | 桤木品系 蒸腾速率 动态特征 差异性 |
Study on dynamic characterisitics of transpiration rate of different varieties of A.cremastogyne Burk and theirs difference |
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| ZHOU Xiaoling , XU Qingqian , XU Zhongkun , YU Wu , DONG Chunying. Study on dynamic characterisitics of transpiration rate of different varieties of A.cremastogyne Burk and theirs difference[J]. Hunan Forestry Science & Technology, 2011, 38(6): 3-10 |
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| Authors: | ZHOU Xiaoling XU Qingqian XU Zhongkun YU Wu DONG Chunying |
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| Affiliation: | 1.Trees Clones Breeding Technology Key Laboratory of Hunan Province,Changsha 410004,China; 2.Hunan Academy of Forestry,Changsha 410004,China; 3.Tibet Agricultural and Animal Husbandry College,Linzhi 860000,China) |
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| Abstract: | The dynamic characteristics of transpiration rate（Tr） of different varieties of A.cremastogyne Burk and theirs difference were studied in this paper.The results showed as follows： ① The diurnal variation of transpiration rate of the upper and lower crown showed single-peak curve or double-peak one.While the lower crown mainly showed the single-peak one.② A.cremastogyne Burk belonged to weak-transpiration midday-depression plant,possessed rather stringent water request.Therefore,one must take care of the precipitation and soil moisture condition of the introduced area during the course of introduction.③ There were highly significant difference between uppre crown and lower one,So did different varieties and different months.And the average Tr of upper crown was remarkable higher than that of lower one,and Tr of H12 and J10 was also noticeable higher than that of J5 and H1.However,Tr of April,June and July was rather strong,while Tr of August,September,October and November was rather weak,and Tr of November was slight higher than that of September and October.④ The order of Pn and Tr was basically coincident among different months,so did different varieties.These indicated that there were close correlation between Pn and Tr. |
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| Keywords: | variety of A.cremastogyne Burk transpiration rate dynamic characteristic difference |
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