---

作 者 ：王仁忠

期 刊 ：生态学报 2004年 24卷 10期 页码：2225~2229

关键词：C4植物；C4/C3比；沙化草地；植被演替；

Keywords:C_4 species, C_4/C_3, desertification grassland, vegetation succession,

摘 要 ：根据野外调查和文献资料研究了浑善达克沙化草地 C4 植物的种类组成及其与沙化草地植被演替的关系。浑善达克沙化草地共有野生 C4 植物 2 7种 ,分属于 7科、2 2个属 ,其中以禾本科最多 ,有 16种 ,藜科次之 ,有 6种。该区域的 C4植物中 1年生植物约占 6 3% ,且多为沙化演替的先锋物种。C4 植物数量和 C4 / C3比基本随沙化演替的进行而增加 ,尤其在弃耕地和流动沙丘阶段 C4 / C3比均在 2 0 %以上 ,体现了 C4 植物抗逆性强的生物学特点。

Abstract:World wide, more than 1700 C_4 plant species have been identified since the work of Downton and Tregunna (1968) and Black (1971). Most of these studies focused on the classification of plant species as to their photosynthetic pathway types (C_3, C_4 and CAM), geographic distribution of C_4 plants and their relationships with climatic patterns. But very few have looked at the relations between C_4 species and vegetation dynamics, especially in deserts and dry regions. C_4 plants and their relations with dese...

---