气候增暖对广东省植物物候变化的影响

根据广东省气象观测资料和10个农业气象观测站的物候观测资料,分析了1982~2004年温度变化对广东省木本植物物候变化的影响,并建立了物候期差异与温度之间的关系模式,分析了当前气候增暖背景下物候期对温度变化的响应关系。结果表明:平均温度上升,木本植物春季物候期提前;平均温度下降,木本植物春季物候期推迟。物候期的提前与推迟对温度的上升与下降的响应是非线性的。在同等升降温幅度情况下,降温导致的物候期推迟幅度较升温导致的物候期提前幅度大。

Effects of Climate Warming on Plant Phenological Changes in Guangdong

The effects of climate warming on plant phonological changes from 1983 to 2004 in Guangdong are studied by use of the plant phenological data and temperature data of 10 Agrometeorological stations in Guangdong of the same time.The models for relationship between phenological periods and temperature are constructed.The responses of the phenological period to climate change are analyzed.The results show that the phenological periods of ligneous plants occurred earlier with increasing temperature in spring;on the contrary,the ligneous plant phenological periods delayed with decreasing temperature.The response of plant phenological periods to climate change is nonlinear.In the context of the same range of temperature rise or fall,the range of phonological period postpone as a result of the temperature fall is greater than that of phonological period advance as a result of temperature rise.