山杨与白桦蒸腾速率及气孔阻抗特征研究
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摘要
利用定点定位观测的方法,对山杨与白桦植株的蒸腾及其影响因素气孔阻抗进行研究。结果表明:山杨与白桦的日间蒸腾速率在2.4-6.5 g·m-2·s-1之间,山杨的蒸腾速率要比白桦高,两个树种早晚的蒸腾速率较低,随着气温升高蒸腾速率逐渐提高,气温最高的正午时刻的蒸腾速率均有所下降。两个树种的气孔阻抗变化范围在0.30-3.02s·cm之间,白桦的气孔阻抗均高于山杨,与测定蒸腾速率的结果相吻合,印证了这两个指标之间的关联性。
By using the method of fixed position observation,transpiration and stomatal resistance of Aspen and Birch had been researched. The result show that,Aspen and Birch daytime transpiration rate between 2. 4- 6. 5 gom- 2os- 1,The transpiration rate of Aspen is higher than Birch,transpiration rate of two species are very low on the morning and evening,the transpiration rate increased gradually with temperature rising,transpiration rate were decreased at the highest temperature at noon 。The stomatal resistance of the two species range between 0. 30to3. 02 socm,Birch is higher than Aspen,consistent with the results of the determination of transpiration rate,confirm the correlation between the two measures.
By using the method of fixed position observation,transpiration and stomatal resistance of Aspen and Birch had been researched. The result show that,Aspen and Birch daytime transpiration rate between 2. 4- 6. 5 gom- 2os- 1,The transpiration rate of Aspen is higher than Birch,transpiration rate of two species are very low on the morning and evening,the transpiration rate increased gradually with temperature rising,transpiration rate were decreased at the highest temperature at noon 。The stomatal resistance of the two species range between 0. 30to3. 02 socm,Birch is higher than Aspen,consistent with the results of the determination of transpiration rate,confirm the correlation between the two measures.
引文
[1]钟育谦,郑阿宝.下蜀次生栎林蒸腾强度的时空变化[J].南京林业大学学报,1999,23(1):61~64.
[2]阮宏华,郑阿宝,钟育谦.次生栎林蒸腾强度与蒸腾量的研究[J].南京林业大学学报,1999,23(4):32~35.
[3]郑阿宝,钟育谦,阮宏华,等.次生栎林蒸腾强度与生态因子的关系.植物资源与环境学报,2000,9(2):27~29.
[4]李昆,曾觉民.金沙江干热河谷主要造林树种蒸腾作用研究[J].林业科学研究,1999,12(3):244~250.
[5]程积民,董建国.黄试区主要造木树种蒸腾作用的试验研究[J].水土保持通报,1995,15(2):22~37.
[6]潘瑞炽,董愚得.植物生理学(第三版)[M].高等教育出版社,1998.
[7]李旭光.缙云山常绿阔叶林优势种蒸腾作用的初步研究见:常绿阔叶林生态学研究,钟章成主编.重庆:西南师范大学出版社,1988 159~211.
[8]李银芳,杨戈,蒋进.不同灌水处理六个树种蒸腾速率与气候因素的关联分析[J].干旱区研究,1994,11(4):29~32.
[2]阮宏华,郑阿宝,钟育谦.次生栎林蒸腾强度与蒸腾量的研究[J].南京林业大学学报,1999,23(4):32~35.
[3]郑阿宝,钟育谦,阮宏华,等.次生栎林蒸腾强度与生态因子的关系.植物资源与环境学报,2000,9(2):27~29.
[4]李昆,曾觉民.金沙江干热河谷主要造林树种蒸腾作用研究[J].林业科学研究,1999,12(3):244~250.
[5]程积民,董建国.黄试区主要造木树种蒸腾作用的试验研究[J].水土保持通报,1995,15(2):22~37.
[6]潘瑞炽,董愚得.植物生理学(第三版)[M].高等教育出版社,1998.
[7]李旭光.缙云山常绿阔叶林优势种蒸腾作用的初步研究见:常绿阔叶林生态学研究,钟章成主编.重庆:西南师范大学出版社,1988 159~211.
[8]李银芳,杨戈,蒋进.不同灌水处理六个树种蒸腾速率与气候因素的关联分析[J].干旱区研究,1994,11(4):29~32.