文献类型：期刊文献

中文题名：滨海围垦地2种木本植物光合特性的研究

英文题名：Studies on photosynthetic characteristics of 2 species of woody plants in coastal reclamation land

作者：张翠[1,2] 吴统贵[1] 方炎明[2] 王臣[3] 成向荣[1] 虞木奎[1]

第一作者：张翠

机构：[1]中国林业科学研究院亚热带林业研究所;[2]南京林业大学森林资源与环境学院;[3]威海市乳山林业局

年份：2011

卷号：31

期号：1

起止页码：52-55

中文期刊名：福建林学院学报

外文期刊名：Journal of Fujian College of Forestry

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家科技支撑计划"沿海陆地防台风防护林体系研究与示范"资助项目9BADB2B0301

语种：中文

中文关键词：光合特性;光饱和点;净光合速率;水分利用效率

外文关键词：photosynthetic characteristics; light saturation point; net photosynthetic rate; water use efficiency

分类号：S718

摘要：采用Li-6400便携式光合仪,对上海南汇区围垦地乌桕、女贞光合特性进行了测定。结果表明,女贞、乌桕的光饱和点分别为1 583.200,920.760μmol.m-.2s-1,它们均为喜阳树种;乌桕和女贞的日变化曲线均为双峰曲线,出现光合"午休"现象,引起乌桕"午休"的原因为非气孔因素,引起女贞"午休"的原因为气孔因素;水分利用效率日均值为乌桕(2.512)大于女贞(1.591)。乌桕在夏季生长期,保持高的水分利用效率,积累较多的有机物质,生长适应性优于女贞。环境因子中,光照和大气相对湿度是影响2种植物光合作用的重要因子。
By means of Li-6400 portable photosynthetic system,the diurnal-variation of photosynthetic characteristics of Sapium sebiferum and Ligustrum lucidum was investigated at coastal reclamation land in Nanhui District,Shanghai.The results showed that：（1）the light saturation point of 2 kinds of plants were 1 583.200,920.760 μmol · m-2 · s-1 respectively,thus they could be viewed as heliphytes;（2）the diurnal courses of the photosynthetic rates of S.sebiferum,L.lucidum were doubled-peaked,and midday photosynthetic depressions occurred in both species.The reasons of midday depression phenomenon of photosynthesis were,however,different,e.g.stomatal limitation for L.lucidum and non-stomatal limitation for S.sebiferum;（3）daily average WUE（water use efficiency） was higher in S.sebiferum（2.512） than in L.lucidum（1.591）.Thus the accumulation of organic matter was higher in S.sebiferum than in L.lucidum.The former grew better than the latter.Pn（net photosynthetic rate） was mainly affected by PAR（photosynthetically active radiation） and RH（relative humidity） among the environmental factors.