文献类型：期刊文献

中文题名：旱柳光合作用动态及其与环境因子的关系

英文题名：Dynamics of Salix matsudana photosynthesis and its relations to environmental factors

作者：吴统贵[1] 周和锋[2] 吴明[1] 萧江华[1] 蒋科毅[1]

第一作者：吴统贵

机构：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400;[2]慈溪市林特技术推广中心,浙江慈溪315300

年份：2008

卷号：27

期号：12

起止页码：2056-2061

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：浙江省重点科技攻关项目(2005C22072);“十一五”国家科技支撑项目专题(2006BAD03A1904);浙江省-中国林业科学研究院合作项目(2005SY09)

语种：中文

中文关键词：杭州湾湿地;旱柳;光合作用;环境因子;通径分析

外文关键词：Hangzhou Bay wetlands ; Salix matsudana ; photosynthesis ; environmental factors ; path analysis.

分类号：S963

摘要：运用Li-6400便携式光合作用系统,于2007年5—11月对杭州湾滨海湿地自然生长的唯一乔木树种——旱柳(Salix matsudana)的叶片光合作用和环境因子动态变化进行了测定,并通过多元逐步回归和通径分析方法分析了光合作用与环境因子间的相互关系。结果发现,生长季节各月所选典型天气下的Pn大小顺序表现为8月>9月>7月>6月>5月>10月>11月;其中5、6、10和11月,旱柳净光合速率(Pn)日变化呈现"单峰"曲线,经分析发现叶片温度(Tl)、大气水汽压亏缺(VPD)和光合有效辐射(PAR)是影响Pn变化的主导因子;7—9月Pn日变化出现"午休"现象,环境因子VPD、Tl和相对湿度(RH)成为主导影响因子;就整个生长季节来看,各因子对Pn变化的影响均显著,Tl和VPD是最主要的2个影响因子。由此可见,旱柳生长季节光合作用存在较大的差异,同时各环境因子对光合作用的影响及影响程度也各不相同。
Salix matsudana is the only tree species in Hangzhou Bay wetland of East China. From May to November 2007, the diurnal and seasonal dynamics of its photosynthesis were determined with Li-6400 Portable Photosynthesis System, and the relationships between the dynamics and environmental factors were analyzed by stepwise multiple-regression and path analysis. The results showed the daily mean value of net photosynthesis rate Po for each month was in the sequence of August 〉 September 〉 July 〉 June 〉 May 〉 October 〉 November. The diurnal course of P, had a unimodal pattern in May, June, October and November, and a mid-depression in July, August and September. The dynamics of P. was very sensitive to the leaf temperature （ T1 ）, vapor pressure deficit （VPD）, and photosynthetic active radiation （PAR） in May, June, October and November, to VPD, Tl, and relative humidity （RH） in July, August and September, and to T1 and VPDin the whole growth period. It was suggested there existed greater variations in the diurnal and seasonal dynamics of Pn in the growth period of S. matsudana, and the effects of test environmental factors differed each other to some extent.