Nitrogen Availability Dampens the Positive Impacts of CO        <sub >2</sub>2        Fertilization on Terrestrial Ecosystem Carbon and Water Cycles

He Liming; Chen Jing M.; Croft Holly; Gonsamo Alemu; Luo Xiangzhong; Liu Jane; Zheng Ting; Liu Ronggao; Liu Yang

摘要

Abstract > The magnitude and variability of the terrestrial CO <sub>2</sub> sink remain uncertain, partly due to limited global information on ecosystem nitrogen (N) and its cycle. Without N constraint in ecosystem models, the simulated benefits from CO <sub>2</sub> fertilization and CO <sub>2</sub> ‐induced increases in water use efficiency (WUE) may be overestimated. In this study, satellite observations of a relative measure of chlorophyll content are used as a proxy for leaf photosynthetic N content globally for 2003–2011. Global gross primary productivity (GPP) and evapotranspiration are estimated under elevated CO <sub>2</sub> and N‐constrained model scenarios. Results suggest that the rate of global GPP increase is overestimated by 85% during 2000–2015 without N limitation. This limitation is found to occur in many tropical and boreal forests, where a negative leaf N trend indicates a reduction in photosynthetic capacity, thereby suppressing the positive vegetation response to enhanced CO <sub>2</sub> fertilization. Based on our carbon‐water coupled simulations, enhanced CO <sub>2</sub> concentration decreased stomatal conductance and hence increased WUE by 10% globally over the 1982 to 2015 time frame. Due to increased anthropogenic N application, GPP in croplands continues to grow and offset the weak negative trend in forests due to N limitation. Our results also show that the improved WUE is unlikely to ease regional droughts in croplands because of increases in evapotranspiration, which are associated with the enhanced GPP. Although the N limitation on GPP increase is large, its associated confidence interval is still wide, suggesting an urgent need for better understanding and quantification of N limitation from satellite observations. </ </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><抽象类型= “主要” 的xml：郎= “EN”> <标题类型= “主”>抽象</ TITLE> >在幅度和地面CO <子>的可变性2 </子>水槽仍然不确定，部分是由于对生态系统的氮（N）和它的循环有限全局信息。如果没有在生态系统炉型N约束，则从CO模拟好处<子> 2 </子>受精和CO <子> 2 </子>在水分利用效率（WUE）诱导的增加可被高估。在这项研究中，叶绿素含量的相对测量的卫星观测被用作用于叶光合N含量为全局2003年至2011年的代理。全球总初级生产力（GPP）和蒸散升高CO <子> 2 </子>和N-约束模型情景下估计。结果表明，全球GPP增加的速率是由85％2000 - 2015年期间没有氮限制高估。该限制被发现在许多热带和寒带森林，其中负叶片N趋势表明在光合能力的降低发生，从而抑制了正极植被响应于增强的CO <子> 2 </子>受精。根据我们的碳水耦合的模拟，增强CO <子> 2 </子>浓度降低气孔导度，并因此在1982至2015年的时间帧增加WUE 10％全球。由于人为增加氮肥，GPP在农田持续增长，并抵消由于氮限制的森林弱的负趋势。我们的研究结果还表明，改进后的水分利用效率是不太可能缓解干旱地区，因为在蒸散量增加，这与增强型GPP相关的农田。虽然GPP增加氮限制较大，其相关的置信区间仍然很大，这对于更好地理解和卫星观测氮限制的量化的迫切需要。 </ p> </ </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2017年第22期</span><b style="margin: 0 2px;">|</b><span>共11页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=He Liming&option=202" target="_blank" rel="nofollow">He Liming;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Chen Jing M.&option=202" target="_blank" rel="nofollow">Chen Jing M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Croft Holly&option=202" target="_blank" rel="nofollow">Croft Holly;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gonsamo Alemu&option=202" target="_blank" rel="nofollow">Gonsamo Alemu;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Luo Xiangzhong&option=202" target="_blank" rel="nofollow">Luo Xiangzhong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Jane&option=202" target="_blank" rel="nofollow">Liu Jane;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zheng Ting&option=202" target="_blank" rel="nofollow">Zheng Ting;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Ronggao&option=202" target="_blank" rel="nofollow">Liu Ronggao;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Yang&option=202" target="_blank" rel="nofollow">Liu Yang;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>Department of Geography and PlanningUniversity of TorontoToronto Ontario Canada;</p> <p>China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing China;</p> <p>China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=nitrogen&option=203" rel="nofollow">nitrogen;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=GPP&option=203" rel="nofollow">GPP;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ET&option=203" rel="nofollow">ET;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=CO 2 fertilization&option=203" rel="nofollow">CO 2 fertilization;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=trend&option=203" rel="nofollow">trend;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=carbon&option=203" rel="nofollow">carbon;</a> </p> <div class="translation"> 机译：氮气;GPP;等;二氧化碳施肥;趋势;碳; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> 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<div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020311999504.html">不同有机物料还田与减氮施肥对麦田碳氮水足迹及生态服务价值的影响</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=陈惠婷&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 陈惠婷</a> <span> . 2016</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/061203965592.html">一种地表陆地生态系统火干扰对地下水影响的模拟装置和方法</a> <b>[P]</b> . <span> 中国专利： CN107462692B </span> <span> . 2020.11.06</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120103981238.html">海岸线开发对海岛陆地生态系统影响的定量化评估方法</a> <b>[P]</b> . <span> 中国专利： CN111369169A </span> <span> . 2020-07-03</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130448512907.html">Method for the determination of the availability of nitrogen and/or carbon in e.g. soils, earth materials, sediments and composts for the plant growth and for the quentification of the nitrogen fertilization</a> <b>[P]</b> . <span> 外国专利：  EP1102065A2 </span> <span> . 2001-05-23</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：确定氮和/或碳的可利用性的方法土壤，泥土，沉积物和堆肥，用于植物生长和氮肥的持续施用 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130448512906.html">Method for the determination of the availability of nitrogen and/or carbon in e.g. soils, earth materials, sediments and composts for the plant growth and for the quentification of the nitrogen fertilization</a> <b>[P]</b> . <span> 外国专利：  EP1102065A3 </span> <span> . 2001-05-30</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：确定氮和/或碳的可利用性的方法土壤，泥土，沉积物和堆肥，用于植物生长和氮肥的持续施用 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130411307134.html">The method of using transgenic clones of aspen and birch with given characteristics as biological models in predicting the nitrogen and carbon cycles in forest ecosystems</a> <b>[P]</b> . <span> 外国专利：  RU2015111078A </span> <span> . 2016-10-20</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：利用具有特定特征的白杨和桦的转基因克隆作为生物学模型预测森林生态系统中氮和碳循环的方法 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div 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Nitrogen Availability Dampens the Positive Impacts of CO 22 Fertilization on Terrestrial Ecosystem Carbon and Water Cycles

摘要

Nitrogen Availability Dampens the Positive Impacts of CO ₂2 Fertilization on Terrestrial Ecosystem Carbon and Water Cycles