Differentiated mineral nutrient management in two bamboo species under elevated CO2 environment
Differentiated mineral nutrient management in two bamboo species under elevated CO2 environment
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高二氧化碳环境下两种竹子的差异化矿质养分管理
DOI：
10.1016/j.jenvman.2020.111600
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发表时间：
2021
影响因子：
8.7
通讯作者：
Shuanglin Chen
中科院分区：
文献类型：
--
作者：
Ziwu Guo;Minghao Zhuang;Liting Yang;Yingchun Li;Shuo Wu;Shuanglin Chen
矿质营养物质在维持植物生长方面发挥着关键作用，但容易受到气候变化的影响，例如大气二氧化碳浓度升高。以往的研究报道，co2浓度升高对植物生长的影响因植物种类而异，这可能会影响植物物种间矿质养分循环的差异。然而，对于二氧化碳浓度的增加如何影响竹类矿物养分的吸收和分配，人们知之甚少。利用开放式顶室（OTCs），研究了co2浓度升高对毛竹（Phyllostachys edulisys）和oligostachyum luum两种成熟竹（Phyllostachys edulisum）三种关键矿质营养素（铁（Fe）、钙（Ca）和镁（Mg））的影响。结果表明：co2浓度升高，叶片和根系生物量增加(毛竹分别为30.24%和10.94%；润滑油：分别为24.47%和13.84%)。相反，co2浓度升高对竹的其他器官（如枝和秆）生物量的影响可以忽略不计。co2浓度的升高也在一定程度上引起了这两种植物各器官间的养分变化。ForPh。升高的co2浓度增加了毛竹叶片中Fe、Ca和Mg的含量及其分配，降低了根中Fe和Mg的分配。相比之下，二氧化碳浓度的升高也只增加了土壤中矿物质的含量和分配。并将Mg降至其根部。结果证实，co2浓度升高导致两种植物对矿质养分的吸收和分配反应存在差异。了解这种差异对二氧化碳浓度增加下竹生态系统的可持续养分管理至关重要。
Mineral nutrients play a critical role in maintaining plant growth, but are vulnerable to climate change, such as elevated atmospheric carbon dioxide (CO2) concentrations. Previous studies reported that impact of elevated CO2concentrations on plant growth vary among plant species, which may affect differential mineral nutrient cycling among plant species. However, little is known about how increasing CO2concentrations affect mineral nutrient uptake and allocation in bamboo species. Using open top chambers (OTCs), we investigated the effects of elevated CO2concentrations on three key mineral nutrients (iron (Fe), calcium (Ca), and magnesium (Mg)) in two mature bamboo species (Phyllostachys edulisandOligostachyum lubricum). Results showed increased leaf and root biomass under elevated CO2concentrations (P. edulis: 30.24% and 10.94%;O. lubricum: 24.47% and 13.84%, respectively). Conversely, elevated CO2concentrations had negligible effects on the biomass of other bamboo organs (e.g., branches and culms). To a certain extent, elevated CO2concentrations also caused nutrient variation among the various organs of these two species. ForPh. edulis, elevated CO2concentrations increased mineral content (Fe, Ca, and Mg) in and allocation to leaves while it decreased Fe and Mg allocation to roots. By contrast, elevated CO2concentrations only increased mineral content in and allocation toO. lubricumleaves and decreased Mg to its roots. Results confirmed that elevated CO2concentrations resulted in differential mineral nutrient uptake and allocation response between these two species. Understanding such differences is critical to the sustainable nutrient management of bamboo ecosystems under increasing CO2concentrations.