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- Title
蒋家沟流域不同海拔灌草层群落特征与土壤关系的研究.
- Authors
贺静雯; 刘 颖; 李松阳; 余 杭; 吴建召; 崔 羽; 林勇明; 王道杰; 李 键
- Abstract
ln order to explore the relationship between the spices diversity of shrub-grass layers and soil nutrients and water content in plant communities at different attitude gradients in the dry-hot valley area. We selected the jiangjiagou watershed as the research area, which is a typical watershed dry and hot valleys. The sample zone was set in watershed at attitude of 1 400-3 000 m, and conducted a sample survey on the plant communities with eight attitude gradients in the sample zone. We firstly counted the species com1H1silinn of the shrub layer and measured soil nutrients, soil water content and water holding capacity at different attitude gradients. Then we analyzed the soil index and vegelation diversity index by principal component analysis and Pearson correlation analysis. The results showed that 80 species of 32 families, 77 genera, shrub layer plants were found in plots in the watershed . The composition of plant conununities, soil organic carbon (SOC) content, total phosphorus (TP) content, soil water content and water holding capacity in the shrub layer Were significantly affected by the deviling gradient (P<0.05). Among them, soil water content, water holding capacity, plant conununities reaches index and diversity index all increased with attitude, and the SOC content in the high attitude area was significantly higher than that in the middle and low attitude areas ( P<0.05). There were. significant positive correlation between soil TN content and pielou index soil water content and Margalte index, Shannon-Viener indexe and species number (P<0.05). lt shows that besides the elevation gradient, soil nutrients and water content and also the key factors affecting the composition and diversity of shrub layer and grass layer in plant communities.
- Subjects
SOIL moisture; COMMUNITY attitudes; PRINCIPAL components analysis; SOCIAL surveys; PLANT communities; PEARSON correlation (Statistics)
- Publication
Guihaia, 2020, Vol 40, Issue 8, p1092
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaia.gxzw201902011