| 古尔班通古特沙漠草本植物生物量分配特征 |
| |
| 引用本文： | 孟欢欢,张媛媛,周晓兵,尹本丰,周多奇,陶冶.古尔班通古特沙漠草本植物生物量分配特征[J].中国沙漠,2022,42(1):96-107. |
| |
| 作者姓名： | 孟欢欢 张媛媛 周晓兵 尹本丰 周多奇 陶冶 |
| |
| 作者单位： | 1.安庆师范大学 生命科学学院/皖西南生物多样性研究与生态保护安徽省重点实验室，安徽 安庆 246133;2.中国科学院新疆生态与地理研究所 荒漠与绿洲生态国家重点实验室，新疆 乌鲁木齐 830011 |
| |
| 基金项目： | 国家自然科学基金项目(U2003214);中国科学院战略性先导科技专项(XDA2005020402);中国科学院生物多样性监测网络项目;新疆维吾尔自治区天山青年计划杰出青年科技人才培养项目(2018Q009) |
| |
| 摘 要： | 草本植物层片是古尔班通古特沙漠早春生产力的主要贡献者，为深入了解荒漠草本植物在群落水平上对荒漠环境的整体适应性，分析了沙漠中部1 hm2样地中草本植物层片地上与地下生物量分配关系，并验证了草本植物层片生物量与根冠比、物种丰富度以及植株密度之间的关系。结果表明：（1）类短命植物囊果苔草（Carex physodes）是优势物种，密度为137.68株·m-2，相对密度为72.16%，相对频度为39.29%，地上生物量占层片总生物量的近50%，地下生物量占99%；（2）层片水平草本植物根冠比具有个体大小依赖性；（3）草本植物层片地上与地下生物量无显著异速生长关系，地上生物量具有显著的密度制约关系，根冠比与植株密度之间为线性正相关关系，物种丰富度与地下和总生物量之间为倒U型关系，而地上生物量与丰富度之间为单峰关系；（4）去除层片内的类短命植物囊果苔草后，草本植物层片地上与地下生物量之间为等速生长关系，地下生物量具有显著的密度制约关系，根冠比与植株密度之间为显著的负相关关系，而物种丰富度与生物量之间均呈显著的单峰关系。研究结果在群落/层片水平上明确了荒漠草本植物生物量分配关系及其内在规律。
|
| 关 键 词： | 荒漠 草本植物 生物量分配 异速生长关系 根冠比 |
| 收稿时间： | 2021-06-24 |
| 修稿时间： | 2021-10-08 |
Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert |
| |
| Huanhuan Meng,Yuanyuan Zhang,Xiaobing Zhou,Benfeng Yin,Duoqi Zhou,Ye Tao.Biomass allocation patterns of herbaceous plants in the Gurbantunggut Desert[J].Journal of Desert Research,2022,42(1):96-107. |
| |
| Authors: | Huanhuan Meng Yuanyuan Zhang Xiaobing Zhou Benfeng Yin Duoqi Zhou Ye Tao |
| |
| Institution: | 1.College of Life Sciences / Anhui Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui，Anqing Normal University，Anqing 246133，Anhui，China;2.State Key Laboratory of Desert and Oasis Ecology，Xinjiang Institute of Ecology and Geography，Chinese Academy of Sciences，Urumqi 830011，China |
| |
| Abstract: | Herbaceous plant layer are the main contributors to early spring productivity in the Gurbantunggut Desert. In order to understand the overall adaptability of desert herbaceous plants to the desert environment at community level， the herbaceous plant layer in the 1 hm2 large plot in the middle of the desert was analyzed. The relationship between aboveground and belowground biomass distribution， and the relationship between herbaceous plant layer biomass and root-shoot ratio， species richness and plant density were verified. The results showed as follows： （1） The ephemeral plant Carex physodes was the dominant species with a density of 137.68 （plant·m-2）， a relative density of 72.16%， a relative frequency of 39.29%. The aboveground biomass accounted for nearly 50% of the total biomass， while the belowground biomass accounted for 99%. （2） The root-to-shoot ratio of herbaceous plants at the community level was individual size-dependent. （3） There was no significant allometric growth relationship between the aboveground and belowground biomass of herbaceous plants， and the above-ground biomass had a significant density-constraining relationship. There was a linear positive correlation between root-shoot ratio and plant density. The relationship between species richness and belowground biomass and total biomass was an inverted U-shaped relationship， while the relationship between aboveground biomass and abundance was a unimodal relationship. （4） After removing the ephemeral plant C. physodes in the community， the herbaceous plants had a constant growth relationship between the aboveground and belowground biomass. The belowground biomass had a significant density-constraining relationship， and the root-to-shoot ratio and plant density were significantly negative correlation， and there was a significant unimodal relationship between species richness and biomass. The results of the study clarified the biomass distribution relationship and internal laws of desert herbaceous plants at the community/layer level. |
| |
| Keywords: | desert herbaceous plants biomass allocation allometric relationship root to shoot ratio |
|
| 点击此处可从《中国沙漠》浏览原始摘要信息 |
| 点击此处可从《中国沙漠》下载免费的PDF全文 |
