• 论文 •

关于积温一词及其度量单位科学性问题的讨论

1. 中国农业大学资源与环境学院农业气象系;中国农业科学院农业环境与可持续发展研究所;
• 出版日期:2010-04-10 发布日期:2010-04-10
• 基金资助:
教育部重点培育项目“中国农业重大旱涝灾害成因及农业灾害链研究”(708013)

Discussion on Scientificalness Problem of Accumulated Temperature and Its Unit

ZHENG Da-wei1,SUN Zhong-fu2(1.Department of Agrometeorology,China Agricultural University,Beijing 100193,China;2.Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081)

• Online:2010-04-10 Published:2010-04-10

Abstract: Accumulated temperature is a basic specialized term in agrometeorology and other relative subjects which often occurs in papers of different journals. But there has been a big confusion of its scientificalness and unit for hundred years. Its origin,development,problem of scientificalness and improvement were reviewed in this paper. J.L.Monteith's theory was particularly introduced,in which the essential aspect of thermal time was discovered and explained. Paper titles with term of accumulated temperature and other terms with the same meaning i.e. thermal time,degree-day and heat unit in CAB Literature from 1990 to Oct. 2008 were retrieved. Results showed that there were less and less scientists using accumulated temperature,most using degree-day but more and more using thermal time. Considering the term of accumulated temperature had been using in China for dozens years and was very popular,in order to solve the problem of scientificalness and to keep agreed with physical principles,it was suggested to be replaced by "integrated temperature" ,which had the same Chinese characters and pronunciation,and the unit of "℃" should be also replaced by "℃·d". At the same time,the term explanation of "heat resource" in revised edition of Chinese Agronomic Terms(1993)was renewed as the following:a type of climatic resource different with heat energy in physics,i.e. combination of usable temperature conditions in agriculture and its continued time,usually expressed as integration of temperature to time.