干旱区生态环境知识资源中心(Arid): 疏勒河中游河岸林地下水埋深对胡杨幼苗生物量分配与生长的影响

Arid

	疏勒河中游河岸林地下水埋深对胡杨幼苗生物量分配与生长的影响
其他题名	Effects of groundwater depth on biomass allocation and growth of Populus euphratica seedlings in desert riparian forest in the middle reaches of Shule River
	白雪; 赵成章; 康满萍
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2020
卷号	39 期号:11 页码:3605-3612
中文摘要	植物生物量分配格局对植物的生态适应策略、功能性状构建和繁殖更新模式具有重要的生态学和进化意义。以疏勒河中游荒漠河岸林的天然胡杨幼苗为研究对象,河岸为起点沿平行河岸线的方向依次设置近水区(I) 、中水区(II)和远水区(III)样地,采用标准主轴分析法,分析了不同水分下胡杨幼苗生物量分配特征及异速生长关系。结果表明,随着地下水埋深的降低 ,胡杨群落的高度显著增加(P<0.05),密度显著减小(P<0.05),盖度呈先减小后增加的趋势;样地I和样地II胡杨幼苗根冠比大于1,地上生物量的增加速度小于地下生物量的生长速度,样地III胡杨幼苗根冠比接近1,地上生物量与地下生物量生长速度接近等速关系;胡杨幼苗叶质比和根质比呈减小的趋势(P<0.05),枝质比呈逐渐增加的趋势(P<0.05);胡杨地上植株枝叶数、冠幅、地下根系总根长、平均直径、分形维数和根系表面积均显著增加 (P<0.05) 。疏勒河河岸林胡杨幼苗地上与地下、枝叶、根系的生物量配置模式和生长特征,体现了异质生境中植物功能性状的环境可塑性机制,为理解荒漠河岸林植物的生境适应规律提供了理论依据。
英文摘要	Plant biomass allocation pattern has important ecological and evolutionary significance for plant adaptation strategies,functional trait construction,and reproductive regeneration model. In this study,the standardized major axis (SMA) method was used to examine biomass allocation and allometric relationship of Populus euphratica seedlings in desert riparian forest along a moisture gradient in the middle reaches of Shule River. Three plots were selected based on the distance from the river bank: near water area (plot I),medium water area (plot II) and far water area (plot III). The results showed that,with decreasing groundwater depth,the height of Populus euphratica seedling community increased (P<0.05) but the density decreased (P<0.05), and the coverage first decreased and then increased. In plot I and plot II,root-shoot ratio was greater than 1,and the increase rate of aboveground biomass was lower than that of belowground biomass. In plot III,the root-shoot ratio was close to 1,and the increase rate of aboveground and belowground biomass was almost isometric relationship. The leaf biomass fraction and root biomass fraction exhibited a decreasing trend (P < 0.05),while the branch biomass fraction showed a gradually increasing trend (P<0.05),and the twig number,leaf number,crown,root length, root average diameter,root surface area and fractal dimension were significantly increased (P< 0.05). The biomass allocation patterns and growth characteristics of Populus euphratica seedlings in riparian forests of Shule River reflected the environmental plasticity mechanism of plant functional traits in heterogeneous habitats,providing a theoretical basis for understanding the habitat adaptability of plants in desert riparian forest.
中文关键词	生物量分配 ; 根冠比 ; 异速生长 ; 功能性状 ; 荒漠河岸林
英文关键词	biomass allocation root-shoot ratio allometry functional trait desert riparian forest
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6845626
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353804
作者单位	白雪, 西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州, 甘肃 730070, 中国. 赵成章, 西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州, 甘肃 730070, 中国. 康满萍, 西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	白雪,赵成章,康满萍. 疏勒河中游河岸林地下水埋深对胡杨幼苗生物量分配与生长的影响[J]. 西北师范大学,2020,39(11):3605-3612.
APA	白雪,赵成章,&康满萍.(2020).疏勒河中游河岸林地下水埋深对胡杨幼苗生物量分配与生长的影响.生态学杂志,39(11),3605-3612.
MLA	白雪,et al."疏勒河中游河岸林地下水埋深对胡杨幼苗生物量分配与生长的影响".生态学杂志 39.11(2020):3605-3612.