摘要
Global climate change has caused phenology change of vegetation.This is especially obvious in urban area.This paper reveals response mechanism of spring phenology of main gymnosperm in Harbin City proper to climate change based on relationship study between two typical phenophases(beginning of bud burst and beginning of leaf expansion) of Korean pine(Pinus koraiensis),Koyama spruce(Picea koraiensis Nakai),needle fir(Abies nephrolepis) and Pinus sylvestnis var.mongolica Litv.and the temperature of every ten days in winter and spring through the phenology observation in Harbin proper from 1963 to 2008 and meteorological observation data from 1951 to 2008.Study conclusion shows the advancing trend of the beginning date of accumulated temperature that meets plant germination in Harbin City.The beginning of bud burst of P.koraiensis is mainly subject to temperature in middle and late February and the beginning pf leaf expansion is subject to temperature in middle and late March.The beginning of bud burst of P.koraiensis Nakai is mainly subject to temperature from late January to middle of February and leaf expansion is subject to temperature mainly in March and April.The beginning of bud burst of A.nephrolepis is mainly subject to temperature from January to March and leaf expansion time is subject to temperature in May.The beginning of bud burst of P.sylvestnis var.mongolica Litv.is mainly subject to the middle of March and the middle of April.The spring phenology of all these 4 selected species showed tremendous advancement.However the advancing trend of different species is varied.The impact level of temperature in each phase to spring phenology of different species is different.The spring phenology of all 4 selected species is prominently relevant to the temperature in earlier period before occurrence of phenology.Low temperature is a favor for breaking dormancy of plants.Suitable lower temperature is good for advancing spring phenology of plants.Temperature in Harbin is relatively lower in winter.Increase of temperature in winter is propitious to advancing of spring phenology of plants.
Global climate change has caused phenology change of vegetation.This is especially obvious in urban area.This paper reveals response mechanism of spring phenology of main gymnosperm in Harbin City proper to climate change based on relationship study between two typical phenophases(beginning of bud burst and beginning of leaf expansion) of Korean pine(Pinus koraiensis),Koyama spruce(Picea koraiensis Nakai),needle fir(Abies nephrolepis) and Pinus sylvestnis var.mongolica Litv.and the temperature of every ten days in winter and spring through the phenology observation in Harbin proper from 1963 to 2008 and meteorological observation data from 1951 to 2008.Study conclusion shows the advancing trend of the beginning date of accumulated temperature that meets plant germination in Harbin City.The beginning of bud burst of P.koraiensis is mainly subject to temperature in middle and late February and the beginning pf leaf expansion is subject to temperature in middle and late March.The beginning of bud burst of P.koraiensis Nakai is mainly subject to temperature from late January to middle of February and leaf expansion is subject to temperature mainly in March and April.The beginning of bud burst of A.nephrolepis is mainly subject to temperature from January to March and leaf expansion time is subject to temperature in May.The beginning of bud burst of P.sylvestnis var.mongolica Litv.is mainly subject to the middle of March and the middle of April.The spring phenology of all these 4 selected species showed tremendous advancement.However the advancing trend of different species is varied.The impact level of temperature in each phase to spring phenology of different species is different.The spring phenology of all 4 selected species is prominently relevant to the temperature in earlier period before occurrence of phenology.Low temperature is a favor for breaking dormancy of plants.Suitable lower temperature is good for advancing spring phenology of plants.Temperature in Harbin is relatively lower in winter.Increase of temperature in winter is propitious to advancing of spring phenology of plants.
作者
PEI Shunxiang 1,3 LI Changhai2 GUO Quanshui3 XIN Xuebing1 SUN Jianxin4 HONG Ming3 1.Experimental Centre of Forestry in North China,Chinese Academy of Forestry,Beijing 102300,R.P.China 2.Forest Botanical Garden,Hei Longjiang Province,Harbin 150040,R.P.China 3.Research Institute of Forest Ecology,Chinese Academy of Forestry,Beijing 100091,R.P.China 4.Beijing Forestry University,Beijing 100083,R.P.China
