| 黄河源区发草适生地植物群落特征及其土壤因子解释 |
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| 引用本文： | 罗巧玉,王彦龙,杜雷,刘念,李丽,马玉寿. 黄河源区发草适生地植物群落特征及其土壤因子解释[J]. 草业学报, 2021, 30(4): 80-89. DOI: 10.11686/cyxb2020350 |
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| 作者姓名： | 罗巧玉 王彦龙 杜雷 刘念 李丽 马玉寿 |
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| 作者单位： | 1.青海大学农牧学院，青海 西宁 810008;2.青海省青藏高原药用动植物资源重点实验室，青海师范大学生命科学学院，青海 西宁 810008 |
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| 基金项目： | 国家重点研发计划;青海省重大科技专项;校级中青年科研基金项目 |
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| 摘 要： | 本研究以黄河源区发草作为研究对象,通过生境地植物群落物种结构组成、多样性分布、土壤理化特性等调查,采用相关分析和RDA排序法分析了黄河源区玛沁县5个发草适生地植物群落多样性特征和土壤影响因子及其关系,以期揭示影响发草种群在复杂多样高寒沼泽异质生境中适应性的关键环境因子.结果表明:1)不同发草适生地植物群落结构、组成和多...
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| 关 键 词： | 植物群落 发草 物种多样性 土壤特性 |
| 收稿时间： | 2020-05-20 |
| 修稿时间： | 2020-10-10 |
Plant community diversity and soil factor interpretation of adaptive region of Deschampsia caespitosa in the source region of the Yellow River |
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| LUO Qiao-yu,WANG Yan-long,DU Lei,LIU Nian,LI Li,MA Yu-shou. Plant community diversity and soil factor interpretation of adaptive region of Deschampsia caespitosa in the source region of the Yellow River[J]. Acta Prataculturae Sinica, 2021, 30(4): 80-89. DOI: 10.11686/cyxb2020350 |
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| Authors: | LUO Qiao-yu WANG Yan-long DU Lei LIU Nian LI Li MA Yu-shou |
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| Affiliation: | 1.College of Agriculture and Animal Husbandry，Qinghai University，Xining 810008，China;2.Qinghai Provincial Key Laboratory of Medicinal Plant and Animal Resources of Qinghai-Tibet Plateau，School of Life Sciences，Qinghai Normal University，Xining 810008，China |
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| Abstract: | Theoretically speaking,the ecological characteristics of plant communities are the result of long-term adaptation and co-evolution of plants,climate,soil,terrain and other ecological environment complexes.This research studied plant community diversity characteristics and environmental factors influencing plant community composition in the adaptive region of Deschampsia caespitosa in the source region of the Yellow River.Five plant community types commonly found in Maqin county were studied:I,D.caespitosa(Poaceae)dominant;Ⅱ,Blysmus sinocompressus(Cyperaceae)dominant;Ⅲ,B.sinocompressus and D.caespitosa mixed community;Ⅳ,Kobresia schoenoides(Cyperaceae)dominant;V,K.schoenoides and D.Caespitosa mixed community.Plant species present were surveyed in mid-August 2018,and soil samples collected at the same time to establish key parameters of the plant environment.Correlation analysis and redundancy analysis(RDA)were used to analyze the association between plant species and environment factors and various ecological diversity indexes were calculated.Across the study sites 83 species were recorded belonging to 17 families and 49 genera.Notably,the widely distributed species were members of the Asteraceae,Poaceae,Cyperaceae,Ranunculaceae,Gentianaceae and Scrophulariaceae families.The community species diversity indexes varied greatly between the communities.For community I,the species richness and Shannon-Weiner indexes were lower,and the Alatalo and Pielou Jsw evenness indexes,together with the%cover,height,biomass and importance value of D.caespitosa were significantly higher than in the other communities.There were also significant differences in soil nitrogen(N),phosphorus(P),carbon(C),organic matter(SOM),soil water content(W)and pH between the different plant communities across the 5 study sites in the adaptive region of D.caespitosa.The multivariate analysis of community species diversity indexes,population characteristics and environmental factors showed that the%cover,height,biomass and importance value of D.caespitosa were negatively associated with species richness,Simpson dominance index,Shannon-Wiener index,soil P,soil moisture water,and positively associated with the Alatalo evenness index and soil pH.RDA analysis showed that pH was the main environmental factors affecting community species diversity.D.caespitosa was more suited to a moist to mesophytic soil environment with low P,while the importance value of D.caespitosa decreased significantly with increasing species richness in the community,indicating that D.caespitosa has some characteristics of a pioneer species characteristics and a potential use in restoration and management of degraded grassland. |
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| Keywords: | plant communities Deschampsia caespitosa species diversity soil properties |
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