科尔沁沙地70种草本植物个体和构件生物量比较研究

A Comparative Study of the Individual Biomass and Modular Biomass of 70 Herbaceous Species Found in the Horqin Sandy Land

比较分析了科尔沁沙地70种草本植物盛花期时的个体和构件生物量特性。结果表明:43种植物个体生物量小于5.0 g,大部分物种根、茎、叶、花等构件的生物量均小于2.0 g,62种植物的根冠比小于1,说明70种草本植物中的大部分物种以地上生物量为主,只有少数物种具有较发达的地下根系。植物各构件生物量之间呈显著正相关,对个体生物量的贡献率为:茎>叶>根>花。多年生和1~2年生物种的个体生物量以及各构件生物量均无显著差异,但1~2年生物种的茎和地上生物量对个体生物量的贡献率显著高于多年生物种,而多年生物种的地下生物量对个体生物量的贡献率显著高于1~2年生物种,不同构件对生物量贡献率的差异有利于不同生活型植物的种群扩散和繁衍。

In this study,the individual biomass and modular biomass of 70 herbaceous species in the Horqin Sandy Land were compared.The results showed that the individual biomass of 43 of the 70 species was less than 5.0 g,that the modular(root,stem,leaf and flower) biomass of most of the species was less than 2.0 g,and that the root-shoot ratios of 62 species was less than 1.These results indicate that the individual biomass of most species comes from aboveground biomass,and that just a few species have more branchin...