Chinese Journal of Agrometeorology

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Impacts of Attenuated UV-B Radiation on Microclimate Factors of Cultivating Flue-cured Tobacco

TIAN Xian-jiao1,CHEN Zong-yu1,ZHANG De-guo2,DONG Chen-wen-hua1,JI Peng1(1.College of Agronomy and Biotechnology,Yunnan Agricultural University,Kunming 650201,China;2.College of Resource andEnvironment,Southwest Forestry University,Kunming 650224)   

  • Online:2011-04-10 Published:2011-04-10

Abstract: Potted experiment for flue-cured tobacco(Nicotiana tabacum L.)K326 was conducted with 3 different attenuated UV-B radiation treatments.The impacts of different treatments on microclimate factors were analyzed at early maturity stage of flue-tobacco by using ridge regression analysis.The results showed that the diurnal curve of air temperature(Ta),photosynthetic active radiation(PAR) and vapor pressure deficit(VPD) around tobacco leaf increased,and the diurnal curve of Carbon-dioxide concentration(Ca) and air relative humidity(RH) decreased.All treatments inhibited Ca and RH,but promoted Ta,especially in treatment 2.Treatment 3 was helpful for tobacco leaf absorbing and utilizing radiation.To sum,the impacts of UV-B radiation on microclimate factors were different with different attenuated UV-B radiation treatments.

Key words: Flue-cured tobacco, Flue-cured tobacco, Attenuated UV-B radiation, Microclimate factors, Ridge regression analysis