生态学杂志2018，Vol.37Issue(4)：1095-1101,7.DOI:10.13292/j.1000-4890.201804.036
张掖湿地芦苇蒸腾速率与叶性状关系对土壤水分的响应
The relationship between transpiration rate and leaf traits of Phragmites australis in response to soil moisture in Zhangye wetland
摘要
Abstract
The response of the relationship between transpiration rate and leaf traits to environmental factors is important for clarifying ecophysiological coupling mechanism between carbohydrate metabolism and constructing modes of leaf traits.In this study,we investigated the relationships between transpiration rate (Tr) and leaf area and leaf thickness of Phragmites australis under different soil moisture levels along a transect from the central to the edge of the wetland in Zhangye National Wetland Park,Gansu Province,China.Four plots were established with different soil moisture levels as Ⅰ (95.70％),Ⅱ (67.50％),Ⅲ (50.70％) and Ⅳ (30.17％).The results showed that the height,coverage,and aboveground biomass of the wetland community showed an increase and then decrease trend with the decreases of soil moisture.The leaf area and Tr presented an increase and then decrease trend,while the leaf thickness displayed an increasing trend from plots Ⅰ to Ⅳ.Tr was significantly positively correlated with leaf area in plots Ⅰ and Ⅳ (P＜0.01) and leaf thickness in plot Ⅰ (P＜0.01),but negatively correlated with leaf thickness in plot Ⅳ (P＜0.01).Meanwhile,positive correlations between Tr and leaf area,leaf thickness were found in plots Ⅱ and Ⅲ (P＜0.05).In plots with saturated soil moisture (Ⅰ) and serious soil water deficit (Ⅳ),Phragmites australis built up through a small-thin-leaf mode,and a small-thick-leaf mode,respectively,to keep lower Tr.In the moderate soil water condition (Ⅱ,Ⅲ),they built up through a large-thin-leaf resource investment strategy to achieve higher Tr.All these changes in plants reflect the phenotypic plasticity of plant adaptation to heterogeneous habitats.关键词
蒸腾速率/叶厚度/叶面积/芦苇/张掖湿地Key words
transpiration rate/leaf thickness/leaf area/Phragmites australis/Zhangye wetland引用本文复制引用
李群,赵成章,姚文秀,王建良,张伟涛..张掖湿地芦苇蒸腾速率与叶性状关系对土壤水分的响应[J].生态学杂志,2018,37(4):1095-1101,7.基金项目
国家自然科学基金项目(41461013、91125014和41361010)资助. （41461013、91125014和41361010）
