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当前位置: 首页 > 文章 > 不同空气相对湿度对槭叶草生长及光合生理特性的影响 东北林业大学学报 2014 (3) 24-27+36
Position: Home > Articles > Effects of Relative Air Humidity on the Growth and Photosynthesis of Mukdenia rossii Journal of Northeast Forestry University 2014 (3) 24-27+36

不同空气相对湿度对槭叶草生长及光合生理特性的影响

作  者：
张爽;董然;董妍;赵超
单  位：
吉林农业大学;长春友谊公园管理所
关键词：
槭叶草;空气相对湿度;生长;光合作用
摘  要：
采用自动控制空气相对湿度的方法控制试验设置的4个空气相对湿度(RH)(45%、65%、75%、85%),探究槭叶草在不同空气湿度对槭叶草生长及光合作用的影响。结果表明:85%RH下的槭叶草株高、叶面积、冠面积、比叶质量最大,叶片数最多;而45%RH下上述各指标最低;65%RH与75%RH下介于二者之间,45%RH与其他3个处理下各指标差异显著(P<0.05)。除85%RH以外,其他3个处理均有光合"午休"现象,其中45%RH下两次峰值分别出现在08:00和16:00,而65%RH和75%RH下峰值均出现在10:00和14:00,明显缩短了槭叶草的光合"午休"时间,使其净光合积累量显著增加。相关性分析表明,空气湿度与槭叶草的净光合速率呈显著正相关,说明增加空气湿度能够提高其净光合速率。75%RH下水分利用率和叶绿素质量分数均最高。65%~85%RH均有利于槭叶草的生长及光合作用。
译  名：
Effects of Relative Air Humidity on the Growth and Photosynthesis of Mukdenia rossii
作  者：
Zhang Shuang;Dong Ran;Dong Yan;Zhao Chao;Jilin Agricultural University;Changchun Friendship Park;
关键词：
Mukdenia rossii;;Relative air humidity;;Growth;;Photosynthesis
摘  要：
An experiment with automatic method to control the humidity was conducted to study the effects of air relative humidity( RH) on the growth and photosynthesis of Mukdenia rossii under four treatments of 45% ± 5%,65% ± 5%,75% ± 5% and 85% ± 5%. The plant height,leaf area,crown area and specific leaf weight are the biggest and the stem diameter of M. rossii is the most in 85% ± 5% RH,while the above indicators is the lowest in 45% ±5% RHand between 65% ± 5% and 75% ± 5% RH. 45% ± 5% RHis significant difference from other three treatment( P < 0. 05). Besides 85% RH,midday depression was observed in other three treatments. Two peaks appear in 8:00 am and 16:00 pm in 45% ±5% RH,while 65% ±5% and 75% ±5% RHsignificantly shorten the time of midday depression and increase the net photosynthetic accumulation of M. rossii with two peaks at 10:00 am and 14:00 pm. By correlation analysis,air relative humidity has significant negative correlation with net photosynthetic rate. The increase in air relative humidity can improve its net photosynthetic rate. The water use efficiency and chlorophyll content are the highest in 75% ± 5% RH. 65% ± 5%- 85% ± 5% of RHcan benefit the growth and photosynthesis of M. rossii.

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