| 菲油果光合特性的日变化 |
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| 引用本文： | 向盛萍,袁德义,赵思东,周旭,谭晓风.菲油果光合特性的日变化[J].湖南农业大学学报(自然科学版),2009,35(3). |
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| 作者姓名： | 向盛萍 袁德义 赵思东 周旭 谭晓风 |
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| 作者单位： | 中南林业科技大学,经济林育种与栽培国家林业局重点实验室,湖南,长沙,410004 |
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| 基金项目： | 引进国际先进农业科学技术计划(948计划) |
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| 摘 要： | 利用Li-6400便携式光合测量系统对Coolidge菲油果的叶片净光合速率(Pn)等指标进行了测定,并通过多元逐步回归分析和通径分析方法探讨净光合速率与影响因子的关系.结果表明:菲油果叶片净光合速率日变化曲线为双峰型,在11:00和16:00分别出现1次高峰,具有典型的午休现象;影响菲油果叶片净光合速率的主要因子是空气相对湿度(RH)、蒸腾速率(TR)、气孔导度(GS)和胞间CO2浓度(Ci),叶面温度(Tl)、光合有效辐射(PAR)和大气CO2浓度(Ca)的影响相对较小.净光合速率与主要影响因子的多元回归方程为:Pn=22.637 43-0.165 1Tl-0.162 2PAR-0.001 6RH+0.253 9Ca+ 8.185 85GS+1.127 6TR-0.044 45Ci (R2=0.943).
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| 关 键 词： | 菲油果 净光合速率 生理因子 |
Diurnal variation of photosynthetic characteristics in pineapple guava |
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| XIANG Sheng-ping,YUAN De-yi,ZHAO Si-dong,ZHOU XU,TAN Xiao-feng.Diurnal variation of photosynthetic characteristics in pineapple guava[J].Journal of Hunan Agricultural University,2009,35(3). |
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| Authors: | XIANG Sheng-ping YUAN De-yi ZHAO Si-dong ZHOU XU TAN Xiao-feng |
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| Institution: | The Key Laboratory of Non-Wood Forest Product of Forestry Ministry;Central South University of Forestry and Technology;Changsha 410004;China |
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| Abstract: | The diurnal variations of photosynthesis on the pineapple guava(Feijoa sellowiana Berg.cv.Coolidge) were studied under the same natural conditions by using a Li-6400 portable photosynthesis system,and the relationship between net photosynthetic rate(Pn) and its physio-ecological factors including PAR,RH,Tl,Ca,GS,Ci and TR etc.were clarified by path analysis and stepwise regression equation.The results showed that the curve of diurnal variation of Pn demonstrated two peaks in clear day,which appeared at 11:0... |
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| Keywords: | Feijoa sellowiana Berg net photosynthetic rate physio-ecological factors |
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