论文部分内容阅读
为科学恢复退化土地的生态,合理利用土地资源,对贵阳市花溪区灌木林地、稀疏草地、煤矸石堆场废弃地及粉煤灰堆场废弃地的土壤进行采样,分析土地不同利用方式下土壤藻类群落组成和生物量的变化。结果表明:研究区内表层土壤藻类共计5门28属,其中蓝藻门(Cyanophyta)9个属、绿藻门(Chlo-rophyta)12个属、硅藻门(Bacillariophyta)3个属、甲藻门(Pyrrophyta)和裸藻门(Euglenophyta)各1个属;粉煤灰堆场废弃地土壤中藻类属的个数明显小于灌木林地、稀疏草地和煤矸石堆场废弃地。土地不同利用方式下藻类叶绿素a含量与藻类数量的相关性存在差异,藻类叶绿素a含量大小顺序为稀疏草地>灌木林地>煤矸石堆场废弃地>粉煤灰堆场废弃地,藻类叶绿素a含量与物种丰富度和香浓指数呈正相关,与优势度指数呈负相关。
In order to scientifically restore the ecology of degraded land and make rational use of land resources, the soil of shrub land, sparse grass land, coal gangue yard wasteland and fly ash yard wasteland in Huaxi District of Guiyang City was sampled. Soil under different land use types Algae community composition and biomass changes. The results showed that there were altogether 5 genera and 28 genera in the study area, including 9 genera of Cyanophyta, 12 genera of Chlo-rophyta, 3 genera of Bacillariophyta, (Pyrrophyta) and Euglenophyta (1 species) respectively. The number of algae in the wasteland of fly ash yard was significantly less than that in shrub land, sparse grassland and coal gangue yard. There were differences in the correlation between the chlorophyll a content of algae and the quantity of algae under different land use patterns. The order of chlorophyll a content was algal meadow grassland> shrub land> gangue yard wasteland> fly ash yard wasteland, algae chlorophyll a content Positively correlated with species richness and fragrant index, and negatively correlated with the index of dominance.