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Received:September 06, 2017Revised:October 10, 2017
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Study on the Populations Characteristics of Rare and Endangered Plants in Longwen-Huangtian Natural Reserve of Pingyuan, Guangdong Province
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Abstract:
Based on the references, herbarium, and the data of field investigation for more than 10 years, the species, numerous and distribution of key national protected plant, rare and endangered plants in Longwen-Huangtian Provincial Nature Reserve of Pingyuan, Guangdong, and the height structure and age structure of some distinctive plant populations were studied in this paper, so as to provide scientific basis for the survival and development of these valuable species. The results showed that there were 14 species belonging to 12 genus and 11 families for all kinds of rare and endangered plants in the reserve, including two species of Cycas taiwaniana, and Bretschneidera sinensis as Grade I for key national protected plants, 9 species as Grade II. The productive organs of Cycas taiwaniana have not been seen for many years, and that might result in it''s senescence. The Phoebe bournei population was dominant by seedling height of 0.3 to 1.3 m, and was mostly made by grade II seedling for age structure, so the population showed a not typical increasing population. Most of the individuals were between the heights of 8.1 to 10.0 m for Semiliquidambar cathayensis population, the age structure was made mostly by the middle trees, and no seedling was found, so the population was medium declining population. Similar to the S. cathayensis population, most of the Eurycorymbus cavaleriei individual was between the heights of 9.1 to 10.0 m, and the age structure was mostly by the middle trees, the population was early declining population. Castanopsis kawakamii population was dominant by the seedling with height of beneath 2.0 m, the population was relative stable. According to the characteristics of the various population, some relevant protective measures were suggested in this paper.
Key words:  age structure; height structure; key national protected plant

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