ZHAO Jing,QIN Wei-ming,LI Long-fei,et al.Influence of Different Planting Densities on Photosynthetic and Fluorescent Characteristics of Korla Fragrant Pear[J].Northern Horticulture,2014,38(06):27-31.
不同栽植密度对库尔勒香梨光合荧光特性的影响
- Title:
- Influence of Different Planting Densities on Photosynthetic and Fluorescent Characteristics of Korla Fragrant Pear
- 文章编号:
- 1001-0009(2014)06-0027-05
- Keywords:
- Korla Fragrant pear; planting density; photosynthetic characteristics; chlorophyⅡ fluorescence
- 分类号:
- S 661.2
- 文献标志码:
- A
- 摘要:
- 以树龄20年生库尔勒香梨为试材，采用Li-6400光合仪，测定分析了3 m×5 m、4 m×5 m、5 m×6 m 3个不同栽植密度下库尔勒香梨净光合速率（Pn）、蒸腾速率（Tr）、胞间CO2浓度（Ci）、气孔导度（Gs）的变化，利用调制式OS-30P荧光仪测定了初始荧光（Fo）、最大荧光（Fm）、最大PSⅡ光能转换效率（Fv/Fm）和PSⅡ潜在活性（Fv/Fo），研究了不同栽植密度对库尔勒香梨光合荧光特性的影响，旨在选出当地最适宜的栽植密度。结果表明：不同栽植密度对库尔勒香梨光合特性影响很大，3个处理间除Gs和Fo差异不显著外，Pn、Tr、Ci、Fm、Fv/Fm、Fv/Fo值的差异都达到了极显著水平；Pn的日均值以4 m×5 m最大，5 m×6 m次之，3 m×5 m最小，Fv/Fm的日均值表现为4 m×5 m高于5 m×6 m，而低于3 m×5 m。试验表明，20年生库尔勒香梨3个栽植密度以4 m×5 m光合效率最强，5 m×6 m其次，3 m×5 m最弱。
- Abstract:
- Taking 20-year-old Koral Fragrant pear as material,with Li-6400 photosynthetic apparatus,the net photosynthetic rate (Pn),transpiration rate (Tr),intercellular CO2 concentration (Ci),stomatal conductance (Gs) under three different planting densities (3 m×5 m,4 m×5 m,5 m×6 m) were measured and analyzed;using Pulse-amplitude Modulation fluorometer,OS-30P,the initial fluorescence(Fo),maximal fluorescence(Fm),maximal efficiency of primary conversion of light energy of PSII(Fv/Fm),maximal potential of primary conversion of light energy of PSII(Fv/Fo) were measured too.The main aim of this study was to compare photosynthetic and fluorescent characteristics of Koral Fragrant pear under different densities,and choose a appropriate planting density.The results showed that different planting density had a great influence on photosynthetic characteristics of fragrant pear,there were not significant differences in Gs,Fo among the three processing and the differences in Pn、Tr、Ci、Fm、Fv/Fm、Fv/Fo were extremely significant.The Pn of 4 m×5 m was the highest,whereas 3 m×5 m was the lowest.Fv/Fm day average performance for 4 m×5 m was higher than 5 m×6 m,but less than 3 m×5 m.The experiment showed that 20-year-old Koral Fragrant pear’s under three planting density of which 4 m×5 m was the strongest,5 m×6 m was the second and 3 m×5 m was the weakest.
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备注/Memo
第一作者简介：赵菁（1988-），女，新疆博乐人，硕士研究生，研究方向为果树生理生态学。E-mail：zhaojing_1217@126.com.