Measured and modeled biomass growth in relation to photosynthesis acclimation of a bioenergy crop (Reed canary grass) under elevated temperature, CO2 enrichment and different water regimes
Measured and modeled biomass growth in relation to photosynthesis acclimation of a bioenergy crop (Reed canary grass) under elevated temperature, CO2 enrichment and different water regimes
复制标题
在高温、二氧化碳富集和不同水况下测量和模拟与生物能源作物（芦苇金丝雀草）光合作用驯化相关的生物量生长
DOI：
10.1016/j.biombioe.2012.08.019
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发表时间：
2012-11-01
影响因子：
6
通讯作者：
Wang, Kai-Yun
中科院分区：
文献类型：
--
作者：
Ge, Zhen-Ming;Zhou, Xiao;Wang, Kai-Yun
The seasonal biomass growth and photosynthesis performance of a bioenergy crop, Reed canary grass (Phalaris arundinacea L.) under elevated temperature (ambient + 3.5 degrees C), CO2 enrichment (700 mu mol mol(-1)) and different water regimes, was examined. To quantify the contributions of acclimated photosynthesis to biomass growth under the environmental treatments, a simplified model was parameterized to simulate the seasonal biomass accumulation of this bioenergy crop. As a result, we found that during the early growing periods, the photosynthesis, leaf development and above-ground biomass growth of the plants were enhanced under elevated temperature conditions, due to higher temperature sum for crop development compared to ambient temperature conditions. However, elevation of temperature resulted also in earlier senescence and lower total biomass of RCG at the final harvest, which effect was the most pronounced with low soil water table. As a comparison, CO2 enrichment increased significantly the leaf development, photosynthesis and total biomass growth over the whole growing season. Under the combined elevation of temperature and CO2, the acclimation of photosynthesis and total biomass of the plants at the final harvest was similar to those caused by elevated temperature alone. In general, high water table favored the photosynthesis and biomass growth of the plants. To conclude, the simplified model built for this bioenergy crop simulated well the dynamics of seasonal canopy photosynthesis and biomass growth, and with good accuracy. Meanwhile, the uncertainty of model was also discussed. (C) 2012 Elsevier Ltd. All rights reserved.
