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首页> 外文期刊>Pakistan journal of botany >Carbon storage and allocation pattern in plant biomass under drought stress and nitrogen supply in Eucalyptus camaldulensis and Populus deltoides
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Carbon storage and allocation pattern in plant biomass under drought stress and nitrogen supply in Eucalyptus camaldulensis and Populus deltoides

机译：桉树胁迫下植物生物质中的碳储存和分配模式，桉树菌和杨霉素氮供应

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Climate change may have multi-faceted adverse effects on forests worldwide such as pest outbreaks, fires, heat waves, and drought. These stresses including changes in water and nutrient availability, cause an imbalance in carbon uptake by plants. In this study, two species Eucalyptus camaldulensis (evergreen) and Populus deltoides (deciduous) were selected for carbon content and allocation analysis with the application of nitrogen fertilizer and water stress treatments. A pot experiment was done by planting 2 years old seedlings in 5kg pots in a glasshouse for four weeks. The experiment was a 2-factor factorial completely randomized design having three water stress levels D0, D1, D2 (1000, 500 and 250 mL) and three nitrogen treatments N0, N1, N2 (0, 0.5 and 1 gNkg -1 ). Significant and non-significant nitrogen into drought interactions (NxD) were observed for each treatment. Results showed that in Populus deltoides , at N2D2 treatment, shoot carbon content was increased up to 63% to 75%. Whereas in Eucalyptus camaldulensis , shoot carbon content was increased up to 51% to 52% at N0D2 treatment. Leaf carbon contents were increased 23% to 44% in E. camaldulensis and 0.3% to 4% in P. deltoides , at N1D1 treatment respectively. Dry shoot biomass was increased 3.8g to 7g at N2D2 treatment in E. camaldulensis whereas 45g to 81g at N1D2 in P. deltoides. Increased root biomass production was observed in N1D0 of P. deltoides (31.96g) and E. camaldulensis (2.73g) . Leaf biomass was more observable in E. camaldulensis , at N1D2, up to 4.72g and in P. deltoides at N2D1 up to 3.4g. A significant increase at NxD interactions was observed in root carbon content, shoot length, root length, root biomass and Relative Water Content (RWC) in E. camaldulensis . Likewise, root length, shoot biomass, root biomass, Water Use Efficiency (WUE) and RWC was significantly increased in P. deltoides at NxD interactions. These significant improvements related to carbon allocation and physiological growth, with NxD interactions, can be attributed to the improved acquisition of nutrients by these species in the drought-stressed environments.
机译：气候变化可能对全球森林的多面不利影响，如害虫爆发，火灾，热浪和干旱。这些应力包括水和营养可用性的变化，导致植物碳吸收的不平衡。在本研究中，选择两个种类的桉树菌（Evergreen）和杨树逐步（落叶）用于碳含量和分配分配，应用氮肥和水胁迫处理。通过将2岁的幼苗在5kg盆中种植玻璃盆中的5kg盆中进行了四周来完成罐实验。该实验是一个2因素因子完全随机化设计，具有三种水胁迫水平D0，D1，D2（1000,500和250mL）和三种氮气处理N0，N1，N 2（0,0.5和1gNKG -1）。对每种治疗观察到有显着和非显着的氮气进入干旱相互作用（NXD）。结果表明，在N2D2治疗中，芽碳含量高达63％至75％。虽然在桉树卡马尔氏菌中，在N0D2处理下，芽碳含量高达51％至52％。叶片碳含量分别在E. Camaldulensis中增加23％至44％，分别在N1D1治疗中在P. deltoides中增加0.3％至4％。在E.Camaldulensis的N2D2处理中，在E. Camaldulensis的N 2 D 2处理中，干芽生物质增加3.8g至7g。在P. Deltoides的N1D2下45g至81g。在P. deltoides（31.96g）和E. camaldulensis（2.73g）的N1D0中观察到增加的根生物质产生。在N1D2的E.Camaldulensis中更可观察到叶生物质，在N1D2，高达4.72g，在N2D1的倍二曲线上，高达3.4g。在E. camaldulensis中，在根碳含量，芽长，根部长度，根生物量和相对含水量（RWC）中观察到NXD相互作用的显着增加。同样地，在NXD相互作用的P.Teltoides中，根长，芽生物质，根生物质，水使用效率（WUE）和RWC显着增加。与碳分配和生理生长有关的这些显着改善，具有抗碱性相互作用，可归因于在干旱强调环境中通过这些物种改善营养素的获取。

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