Chinese Journal of Agrometeorology ›› 2011, Vol. 32 ›› Issue (04): 538-542.doi: 10.3969/j.issn.1000-6362.2011.04.010

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Phenological Change of Populus simonii Carr And It′s Response to Air Temperature Variation in Last 30 Years in Inner Mongolia

CAO Yan fang,WEI Yu rong,YOU Li,LIU Peng tao,WU Qiu feng   

  1. Inner Mongolia Meteorological Information Centre,Hohhot 010051,China;Inner Mongolia Ecological & Agricultural Meteorology Centre,Hohhot 010051;Inner Mongolian Climatic Centre,Hohhot 010051;Inner Mongolia Branch Bureau of North China Air Traffic Control Bureau of CAAC,Hohhot 010070
  • Online:2011-11-20 Published:2011-11-23

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Abstract: Based on phonological and meteorological data from 24 phenology observation stations in Inner Mongolia in last 30 years,the phonological characters and trends of average spring sprout and autumn leaf fading of Populus simonii Carr were analyzed The results showed that spring sprout of  Populus simonii Carr was advanced with the rate of 1.4d/10y in last 30 years.The highest advanced phase of percentage ratio of annual was in 1990s,followed by 2000-2008.The date of Leaf fading postponed with the rate of 3.0 d/10y.The highest postponed phase of percentage ratio of annual was in 2000-2008.The spring sprout of Populus simonii Carr was significant negative correlation with the spring temperature (P<0.05),and the autumn leaf fading was significance positive correlation with autumn temperature (P<0.05),which indicated that the sprout advanced more with the spring temperature increasing,the leaf fading postponed more with autumn temperature increasing.

Key words: Sprout, Leaf fading, Phenology