Collaborative impact of elevated CO2 concentration and temperature on potato yield and quality
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DOI:10.7606/j.issn.1000-7601.2019.04.32
Key Words: potato yield  quality  climatic change  elevated CO2 concentration  elevated temperature  collaborative influence
Author NameAffiliation
ZHANG Xiu-yun Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China Meteorological Bureau of Dingxi of Gansu ProvinceDingxi, Gansu 743000, China 
YAO Yu-bi Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China Lanzhou Resources and Environment Vocational and Technical College, Lanzhou, Gansu 730021, China 
LEI Jun Meteorological Bureau of Dingxi of Gansu ProvinceDingxi, Gansu 743000, China 
Niu Hai-yang Meteorological Bureau of Dingxi of Gansu ProvinceDingxi, Gansu 743000, China 
ZHAO Hong Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou, Gansu 730020, China 
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Abstract:
      In the semi-arid regions of Loess Plateau, OTC (open-top chamber) was used to study the collaborative impact of increased CO2 concentration and atmospheric warming on potato growth, yield, and quality from 2016 to 2017. The result showed that the net photosynthesis rate of leaves treated with elevated temperature and increased CO2 concentration was 36.3% higher than that of the leaves treated only with elevated temperature only, and 34.7% higher than that of the control group from the inflorescence forming stage to the early stage of stem tuber enlargement. The water use efficiency of leaves treated with warming and increased CO2 concentration was 47.4% distinctly higher than the control group and 43.4% higher leaves treated with only elevated temperature. The actual yield and stem tuber protein content of potatoes treated with elevated temperature and CO2 concentration were 12.9% and 37.0%, significantly higher than that of the control group and 59.7% and 6.3% higher than that of the potatoes treated with only elevated temperature. The elevated temperature and CO2 concentration did improve the potato net photosynthesis rate, water use efficiency, organic substance accumulation, and the yield.
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