文献类型：期刊文献

中文题名：柚木无性系光合作用的日季节变化及其主要影响因素

英文题名：Diurnal and seasonal photosynthetic characteristics and influencing factors in teak clones

作者：黄桂华[1] 梁坤南[1] 周再知[1] 马华明[1]

第一作者：黄桂华

机构：[1]中国林业科学研究院热带林业研究所

年份：2016

卷号：36

期号：4

起止页码：11-16

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金："十二五"国家科技支撑计划"柚木和西南桦珍贵用材林定向培育技术研究与示范"课题(2012BAD21B01)

语种：中文

中文关键词：柚木;净光合速率;日变化;季节变化;生态因子

外文关键词：teak; net photosynthesis rate; diurnal changes; seasonal changes; ecological factors

分类号：S796

摘要：以柚木无性系苗为材料,研究了柚木光合作用及其相关生态因子的日季节变化,分析了柚木光合作用的主要影响因子。结果显示,在广州,柚木6月净光合速率(Pn)的日变化为单峰曲线,高峰值(9.826μmol·m^(-2)s^(-1))出现在上午11时;8月和10月净光合速率的日变化则为双峰曲线,出现"午休"现象,第一高峰均出现在上午9时,分别为8.317和11.915μmol·m^(-2)s^(-1),8月第二小高峰出现在15:00~16:00之间,10月第二小高峰出现在13:00。不同月份(季节)的柚木净光合速率大小排序为10月>6月>8月。影响柚木光合作用的生态因子主要是光合有效辐射,二者存在极显著正相关;其次是温度,6月和8月中午高温对柚木的光合作用有极显著的抑制作用。
The photosynthetic characteristics and influencing factors have been studied on clones younglings of Tectona grandis by Li- 6400 photosynthetic system, the results showed that the curves of diurnal variations of net photosynthetic rate had one single peak curve in June at Guangzhou, the peak value 9.826 μmol.m-2s-1 was at 11：00, while it showed two-peak curves with ＂photosynthetic midday depression＂ in August and October, the highest peak values 8.317 and 11.915 μmol.m-2s-1 respectively were at 9：00, the second peak value was around 15：00 to 16：00 in August and at 13：00 in October. The average net photosynthetic rate of teak was October 〉 June 〉 August. Photosynthetic available radiation （PARo） is the most important ecological factor influencing the net photosynthetic rate of teak, and then is air temperature. PAR has great significant positive correlation with net photosynthetic rate, high temperature in June and August has great significant depressing effect to net photosynthetic rate.