植物研究2025，Vol.45Issue(5)：686-694,9.DOI:10.7525/j.issn.1673-5102.2025.05.004
兴安落叶松水分利用效率对模拟气候变暖的响应
Responses of Water Use Efficiency in Larix gmelinii to Simulated Climate Warming
摘要
Abstract
Exploring the impact of climate warming on water use efficiency(WUE)of trees is significant for understanding the responses of tree carbon-water coupling to climate warming.In 2004,Larix gmelinii seedlings grown in four sites along temperate gradient(e.g.,Tahe,Songling,Sunwu and Dailing)simulating climate warming were transplanted to a common garden(Mao'ershan)near the natural edge of this species'range.In August 2022,in the common garden and four different transplanting sites,the instantaneous water use efficiency(WUEi)and intrinsic water use efficiency(WUEg)were measured using the gas exchange method,and long-term water use efficiency(WUEL)was calculated via carbon-13 isotope abundance to explore the effects of different simulating climate warming magnitudes on WUE of L.gmelinii.The results showed that both WUEi and WUEg significantly increased,with an increase of 33.37%,38.84%,42.06%and 58.76%for WUEi,and an increase of 15.94%,18.47%,20.84%and 39.10%for WUEg of L.gmelinii under the simulated climate warming by transplantation from the sites Tahe,Songling,Sunwu and Dailing,respectively.The WUEL significantly increased by 16.92%and 30.56%for Songling and Tahe,respectively.The increasing rate of WUEi,WUEg and WUEL showed positive linear correlations with the warming magnitude.Both WUEi and WUEg showed significant and similar site differences in the common garden and among the transplanting sites,while WUEL showed significant differences only among the transplanting sites.WUEi was sensitive to all the warming magnitudes,but WUEL was sensitive only to the high warming magnitude.Therefore,the warming magnitude and the determining methods should be taken into consideration in tree WUE responses to climate warming.关键词
气候变化/碳水耦合/水分利用效率/兴安落叶松/光合能力Key words
climate change/carbon-water coupling/water use efficiency/Larix gmelinii/photosynthetic capacity分类
农业科技引用本文复制引用
王楠,王晶晶,王传宽,全先奎..兴安落叶松水分利用效率对模拟气候变暖的响应[J].植物研究,2025,45(5):686-694,9.基金项目
黑龙江科技大学基本科研业务费项目(2023-KYYWF-0536) （2023-KYYWF-0536）
黑龙江科技大学引进高层次人才科研启动基金项目(HKD202011). （HKD202011）
