| 甘肃中东部地区9种薹草属植物分布区群落特征和土壤养分状况 |
| 点此下载全文 |
| 引用本文：康瑞卿，白小明，冉 福，李 萍，杨小妮，陈浪浪.甘肃中东部地区9种薹草属植物分布区群落特征和土壤养分状况[J].西北植物学报,2023,43(2):305~315 |
| 摘要点击次数: 43 |
| 全文下载次数: 73 |
|
| 基金项目:国家自然科学基金(31560667)；中国科协产业发展服务项目(2021XHQK002)；甘肃省林草局草原生态修复治理科技支撑项目(GSLC-2020-3)；甘肃省科技计划项目(20JR10RA564) |
|
| 中文摘要:为探究薹草属(Carex L.)植物在不同植被类型中的分布状况，该研究对甘肃中东部地区9种薹草属(Carex L.)植物分布区的群落特征进行调查，并对土壤养分状况进行比较分析，以揭示野生薹草群落物种多样性和分布特征与土壤环境因子间的关系。结果表明：(1) 9种薹草群落物种多样性差异性较大，Shannon-Wiener多样性指数(H)、Simpson优势度指数(Dsi)均以青绿薹草群落最高，亚柄薹草最低；Patrick丰富度指数(R)以异穗薹草群落最高，细叶薹草群落最低；Pielou均匀度指数(Jsw)以凹脉薹草群落最高，亚柄薹草最低。(2) 9种野生薹草属植物适宜生长的土壤pH呈中性或弱碱性，且有机质、氮素、钾素含量较丰富，磷含量偏低；土壤有机质、pH、全氮、全磷、全钾、碱解氮、速效磷、速效钾含量的平均值分别为41.07 g·kg-1、8.35、1.16 g·kg-1、0.65 g·kg-1、5.60 g·kg-1、47.94 mg·kg-1、5.82 mg·kg-1和100.60 mg·kg-1。(3) 9种薹草属植物群落物种多样性与全氮、全磷、全钾、碱解氮、有机质、降雨量和海拔呈正相关关系，而与土壤pH、速效磷、速效钾呈负相关关系，且降雨量、土壤pH、速效磷和有机质对9种野生薹草属植物群落物种多样性影响较大。 |
| 中文关键词:野生薹草 分布区 土壤养分 群落物种多样性 |
| |
| Community Characteristics and Soil Nutrient Status of 9 Carex L. Plants in Central and Eastern Gansu Province |
|
|
| Abstract:In order to explore the distribution of Carex L. plants in different vegetation types, this study investigated the community characteristics of 9 Carex L. plant species in central and eastern Gansu Province, and compared and analyzed the soil nutrient status, to reveal the relationship between the species diversity and distribution communities and soil environmental factors of wild Carex L. The results show that: (1) the species diversity of the 9 Carex communities was significantly different. The Shannon-Wiener diversity index (H) and Simpson dominance index (Dsi) were the highest in Carex breviculmis community, and the lowest in the Carex lanceolata community. The Patrick richness index (R) was the highest in Carex heterostachya community and the lowest in Carex rigescens community. The Pielou evenness index (Jsw) was the highest in Carex melanostachya community and the lowest in C. lanceolata community. (2). The soil suitable for the growth of 9 wild Carex species was neutral or weakly alkaline, and the contents of organic matter, nitrogen and potassium were rich, but the content of phosphorus was low. The average contents of soil organic matter, pH, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, and available potassium were 41.07 g·kg-1, 8.35, 1.16 g·kg-1, 0.65 g·kg-1, 5.60 g·kg-1, 47.94 mg·kg-1, 5.82 mg·kg-1and 100.60 mg·kg-1, respectively. (3) The species diversity of 9 Carex species was positively correlated with total nitrogen, total phosphorus, total potassium, alkali-hydrolyzed nitrogen, organic matter, rainfall and elevation, but it was negatively correlated with soil pH, available phosphorus and available potassium. Rainfall, soil pH, available phosphorus and organic matter had great effects on the community species diversity of 9 wild Carex species. |
| keywords:wild Carex distribution area soil nutrients community species diversity |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
