| 栓皮栎叶芽休眠解除过程的模拟* |
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| 引用本文： | 江泽平.栓皮栎叶芽休眠解除过程的模拟*[J].地理研究,1994,13(1):43-50. |
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| 作者姓名： | 江泽平 |
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| 作者单位： | 中国林业科学研究院林研所 |
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| 基金项目： | 中国林科院科技发展基金 |
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| 摘 要： | 树木的休眠及其解除是一个在理论和实践中都十分重要又悬而未决的问题。本文利用全国范围内获得的观测资料,对栓皮栎这个重要用材树种的叶芽休眠之解除过程进行了模拟。其出发点是:林木存在绝对低温需要,在此需要得到满足后,进一步的低温和驱温的协同作用使林木的生长能力逐步恢复直到休眠解除。研究表明:接近林木基点的温度对低温积累是最有效的,休眠后期的不稳定高温会部分抵消前期低温的影响。栓皮栎对低温的绝对需要量为5个低温单位,休眠完全解除共需34个低温单位和194个驱温单位。在整个分布区内,栓皮栎的休眠解除被划分成四个基本类型,即北方型、中部型、华南型及西南型。并对树木的休眠解除现象进行了深入的讨论。
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| 关 键 词： | 栓皮栎(Ouercus variabilis) 芽休眠解除 模拟 |
| 收稿时间： | 1992-02-25 |
| 修稿时间： | 1993-10-04 |
MODELLING BUD DORMANCY RELEASE IN QYERCUS VARIABILIS BI. |
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| Jiang Zeping.MODELLING BUD DORMANCY RELEASE IN QYERCUS VARIABILIS BI.[J].Geographical Research,1994,13(1):43-50. |
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| Authors: | Jiang Zeping |
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| Institution: | Chinese Academy of Forestry |
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| Abstract: | A moded of bud dormancy release in Quercus variabilis BI.which is an important and widely distributed(about 20-42°N,98-120°E)timber species in China,was established in this paper,based on the presumptions that there are absolute requirements for chilling in trees,and until theabsolute requirement was satisfied the tree can not resumes growth from dormancy status by the combination of chilling temperature and forcing temperature.The results showed that themost effective temperature for the accumulation of chilling unit is what approximates the basetemperature of tree,and the high temperature during the late stage of rest can counteract the effects of previous chilling on rest-break in this tree species.According to the characteristics of both the resumption of growth competence(GC) and the accumulation of the forcing temperature(FT),the dormancy release in Q. variabilis in China could be identified as four main patterns,i.e.,the Northern pattern in which the GC resumes slowly and the FT accumulates slowlyfirst and then rapidly;the Central pattern in which the GC resumes fast and the FT accumulatesslowly;the Southern pattern in which the GC resumes fast and the FT accumulates rapidly;theSouthwestern pattern in which the GC resumes rapidly and the FT accumulates fast.Finally,discussions were provided in details for the future development of modelling dormancy release. |
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| Keywords: | Quercus variabilis BI Bud Dormancy release Modelling |
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