| 秦岭北坡太白红杉不同时间尺度上的径向生长特征及其与环境因子的关系 |
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| 引用本文： | 邓美皎,王孝安,韩兵兵,李 静.秦岭北坡太白红杉不同时间尺度上的径向生长特征及其与环境因子的关系[J].中国农学通报,2016,32(28):1-6. |
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| 作者姓名： | 邓美皎 王孝安 韩兵兵 李 静 |
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| 作者单位： | (陕西师范大学生命科学学院,西安 710119） |
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| 基金项目： | 陕西师范大学中央高校基本科研业务费(GK201503044)。 |
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| 摘 要： | 为了探究秦岭太白红杉(Larix chinensis)径向生长在不同时间尺度上的特征及其与立地环境因子的关系。利用树木年代学及样方调查法，在4个不同时间尺度（1、2、5、10年）4个样地内进行探究。结果表明：（1）随着时间尺度的增加，其径向增长量随树龄增加呈先增加后减小的趋势。（2）单因素方差分析表明，样地1和样地3径向生长差异不显著(P=0.810)，样地2和样地4径向生长差异不显著(P=0.369)，其他各样地间径向生长量差异极显著(P=0.000)。（3）逐步回归法分析表明：在1年的时间尺度上土壤厚度对太白红杉径向生长呈正相关；2年时间尺度上坡度和坡位对其径向生长呈负相关；5年和10年的时间尺度上岩石裸露度对太白红杉径向生长呈正相关，坡度对其径向生长呈负相关；海拔在4个时间尺度上对其径向生长无显著相关性。试验在研究时间尺度上太白红杉径向生长特征以及人工对其的栽培、抚育提供了一定的依据。
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| 关 键 词： | 甘蔗 甘蔗 干旱胁迫 生理响应 抗旱性 综合评价 |
| 收稿时间： | 2015/12/30 0:00:00 |
| 修稿时间： | 2016/2/21 0:00:00 |
Characteristics of Radial Growth of Larix chinensis in Different Time Scales and Its Relationship with Environment Factors in the North Slope of Qinling Mountains |
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| Deng Meijiao,Wang Xiaoan,Han Bingbing and Li Jing.Characteristics of Radial Growth of Larix chinensis in Different Time Scales and Its Relationship with Environment Factors in the North Slope of Qinling Mountains[J].Chinese Agricultural Science Bulletin,2016,32(28):1-6. |
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| Authors: | Deng Meijiao Wang Xiaoan Han Bingbing and Li Jing |
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| Institution: | (College of Life Sciences, Shaanxi Normal University, Xi’an 710119) |
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| Abstract: | This paper aims to explore the characteristics of radial growth of Larix chinensis in different time scales and its relationship with environment factors in Qinling Mountains. The dendrochronology and the quadrat method were used with 4 different time scales (i.e. at intervals of 1, 2, 5 and 10 years, respectively) and in four sample plots with different environments. The results showed that: (1) with increasing time scale, the radial growth increased first and then decelerated with the increase of tree age; (2) the one-way ANOVA analysis showed that the radial growth had no significant difference between Plot 1 and Plot 3 (P =0.810), so did that between Plot 2 and Plot 4 (P=0.369); however, the difference between the other pairs of plots was remarkably significant (P=0.000); (3) stepwise regression analysis showed that the radial growth was positively correlated to the soil thickness in 1 year time scale and negatively correlated to the slope and slope position in 2 year time scale; however, in other time scale i.e. 5 year and 10 year, the radial growth was positively correlated to bare rock degree, and negatively correlated to the slope; but the radial growth of the 4 time scales was not significantly correlated to the altitude. The experiment provided certain bases for exploring the characteristics of radial growth of L. chinensis in different time scales and the artificial cultivation of L. chinensis. |
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| Keywords: | Larix chinensis radial growth time scale environmental factor |
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