| 沙棘的生态地理分布及其植物地理学意义 |
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| 引用本文： | 廉永善,陈学林.沙棘的生态地理分布及其植物地理学意义[J].中国科学院研究生院学报,1992,30(4):349-355. |
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| 作者姓名： | 廉永善 陈学林 |
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| 摘 要： | 沙棘hippophae rhamnoides subsp．sinensis是分布于我国境内的一个亚种，是沙棘属中的原始类群。沙棘的分布区大体呈西南—东北走向，从西藏东北部起，经黄土高原，直至大兴安岭西南角。本文通过对分布区与各生态因子等量线相似性比较，并结合野外考察，探讨了沙棘对各生态因子的耐性限度、最适值以及限制因子。研究发现，沙棘灌丛不仅有一个比较稳定的分布区，而且受大的气候带的控制，表现出明显的水平地带性规律，其分布与我国的三大地理气候区分异规律相一致，正处在我国三大植被区的过渡地带。因而，沙棘的分布可以作为我国三大植被区分界的一个标志，这打破了以往认为灌丛没有明显水平地带性规律的概念。另外，本文还就沙棘分布区与建立人工沙棘园及我国种植制度区划和植树造林之间的关系进行了讨论。
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| 关 键 词： | 沙棘 植被区划 生态因子 种植制度 植树造林 |
The Ecogeographical Distribution of Hippophae rhamnoides Subsp. sinensis and Its Phytogeographical Significance |
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| Lian Yong-Shan,Chen Xue-Lin.The Ecogeographical Distribution of Hippophae rhamnoides Subsp. sinensis and Its Phytogeographical Significance[J].Journal of the Graduate School of the Chinese Academy of Sciences,1992,30(4):349-355. |
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| Authors: | Lian Yong-Shan Chen Xue-Lin |
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| Abstract: | Hippophae rhamnoides L. subsp. sinensis Rousi is confined to China.
The subspecies, a primitive member of the genus, is one of important plant
resources for food and medicinal industry and also a genetic resource for breeding.
The subspecies ranges from Southwest to Northeast China, i .e .from the northeast
part of Tibet to the sourthwest corner of the Da Hinggan Mountains ,through
Loess Plateau. Made in this paper was an analysis of the limits of tolerance, the
limiting factors and the fittest value, and of ecological factors regulating the
distribution area of the subspecies such as heat, sunshine and rainfall. The analy-
sis is based on comparison of the similarities between the distribution range and
the isolines of the various ecological factors, combined with the field work of the
subspecies. The result indicates that not only does the bush of Hippophae
rhamnoides L. subsp. sinensis Rousi occupy a stable geographical range, but also
it shows a zonal distribution pattern, controlled by rainfall and heat. Its geo-
graphical range is roughly located in the transitional zone of three vegetation re-
gions in China, i.e. the east moist forest region, the northwest desert and
steppe region and the Qinghai-Xizang Plateau alpine vegetation region. Therefore,
the bush can be used for delimitating the three vegetation regions. This fact
implies that the concept should be revised that the distribution of bushes is not of
obvious horizontal-zonal pattern. Also discussed in the present paper are ecological
conditions for the artificial Seabuckthron’s garden, the relationship between thegeographical range and the planting system in agriculture as well as the afforestation. |
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| Keywords: | Hippophae rhamnoides L subsp Sinensis Zonation of vegetation Ecological factors Agricultural regionalization Afforestation |
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