摘要
水稻叶气温差是表征其生理生态特性重要参量之一。利用合肥2008年一季稻孕穗抽穗期叶温观测资料及同期气象资料,对叶温、叶气温差与气象条件的关系进行分析。结果表明,同时刻水稻阴阳面叶温仅有细微差别,而不同时刻叶温是随环境条件变化而变化的;叶温与气温有很好的线性相关性,叶气温差与气温、空气相对湿度、空气饱和水汽压差(VPD)三者线性相关性水平依次提高,且均优于叶温与气温;叶气温差与VPD进行二次曲线拟合时,相关性水平仅略有提升,但该二次曲线关系能很好地解释VPD通过影响叶片蒸腾而引起叶气温差的变化的现象。此方法建立叶气温差与空气饱和水汽压差拟合方程,可用于估算叶温,服务于水稻高温热害监测及水分胁迫评估。
Temperature difference between leaf and air（TDBLA） is one of the most important elements in the process of eco-physiology.Using the data of rice leaf temperature and meteorological elements at the development of booting-heading in the paddy field,their relationships were constructed.Firstly,sunlit leaf surface temperature was always a little higher than the shaded of it synchronously,but sustainable change was existed as time goes by.Secondly,strong correlations were established between leaf temperature and air temperature,between TDBLA and air temperature,between TDBLA and air relative humidity,or between TDBLA and saturated vapour pressure deficit（VPD）;in particular,the parabolic equation between TDBLA and VPD was the most notable.To sum up,TDBLA was aroused along with energy transmission during rice transpiration,which was highly effected by meteorological factors.Based on the result,leaf temperature was obtained indirectly,and then crop water stress index and high temperature damage could be evaluated.
出处
《中国农学通报》
CSCD
北大核心
2011年第12期19-23,共5页
Chinese Agricultural Science Bulletin
基金
中国气象局气象监测与灾害预警工程"省级农业气象灾害服务保障系统"
公益性行业(气象)科研专项(GYHY201106027)
公益性行业(气象)科研专项(GYHY201006027)
公益性行业(气象)科研专项(GYHY200906022)
关键词
水稻
叶气温差
气象条件
关系
paddy rice
temperature difference between leaf and air
meteorological factors
relationship
