摘要
以经济林树种的5个不同品种(苹果、桃、梨、杏)为试材,应用CI-340超轻型便携式光合仪,测定了我国北方地区主要的经济林树种的叶片蒸腾作用,通过日蒸腾总量来确定不同树种蒸腾吸热和蒸腾降温值。结果表明:5种经济林果树品种的蒸腾作用、蒸腾吸热和降温增湿能力各不同,其中日蒸腾速率、吸热和降温增湿能力最大的是"XG丰水"梨(1.42mmol·m-2·s-1、2 941.26kJ·m-2·d-1、0.195 2℃);中等的是"红富士"苹果(1.18 mmol·m-2·s-1、2 499.80kJ·m-2·d-1、0.165 9℃)、"晚蜜"桃(1.22mmol·m-2·s-1、2 582.81kJ·m-2·d-1、0.171 4℃)、"龙王帽"杏(1.25mmol·m-2·s-1、2 622.27kJ·m-2·d-1、0.174 0℃);最小的是"串枝红"杏(1.01mmol·m-2·s-1、2 073.75kJ·m-2·d-1、0.137 6℃);5种经济林品种的日蒸腾吸热和日蒸腾降温均表现为,夏季(3 184.74kJ·m-2·d-1、0.211 3℃)>秋季(2 151.52kJ·m-2·d-1、0.142 8℃)>春季(1 975.29kJ·m-2·d-1、0.131 0℃)。此外,林木蒸腾速率的强弱和外界大气温度直接影响着其蒸腾吸热和蒸腾降温能力的大小。
Taking apricot,pear,peach,and apple of the main economic forest tree species in north China as materials,portable photosynthesis analyzer CI-340 was used to calculate their transpiration rate.Furthermore,the effect of absorbed caloric and air temperature reduction were also evaluated by the transpiration rate.The results showed that the transpiration rate,absorbed caloric and air temperature reduction of the five varieties of economic forest tree species were different.Pyrus pyrifolia（1.42mmol·m^-2·s^-1,2 941.26kJ·m^-2·d^-1,0.195 2℃）exhibited the strongest abilities in daily transpiration rate,absorbed caloric and air temperature reduction,while Amygdalus persica Linn（1.25mmol·m^-2·s^-1,2 622.27kJ·m^-2·d^-1,0.174 0℃）,Prunus armeniaca（1.22mmol·m^-2·s^-1,2 582.81kJ·m^-2·d^-1,0.171 4℃）and Malus pumila Mill（1.18mmol·m^-2·s^-1,2 499.80kJ·m^-2·d^-1,0.165 9℃）showed the moderate abilities,and Prunus armeniaca（1.01 mmol·m^-2·s^-1,2 073.75kJ·m^-2·d^-1,0.137 6℃）displayed the lowest abilities;the 5varieties of economic forest tree species＇ capacity order of diurnal absorbed caloric and air temperature reduction were summer（3 184.74kJ·m^-2·d^-1,0.211 3℃）〉autumn（2 151.52kJ·m^-2·d^-1,0.142 8℃）〉spring（1 975.29kJ·m^-2·d^-1,0.131 0℃）in different season.Besides,the transpiration rate of trees had a significant positive correlation with the amounts of absorbed caloric and air temperature reduction.
出处
《北方园艺》
CAS
北大核心
2015年第18期22-25,共4页
Northern Horticulture
基金
林业公益性行业科研专项资助项目(201204101)
关键词
经济林树种
蒸腾速率
蒸腾吸热
蒸腾降温
economic forest tree species
transpiration rate
absorbed caloric
air temperature reduction
