Influence of Different Planting Densities on Photosynthetic and Fluorescent Characteristics of Korla Fragrant Pear(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Influence of Different Planting Densities on Photosynthetic and Fluorescent Characteristics of Korla Fragrant Pear

Author(s):: ZHAO Jing¹; QIN Wei-ming²; LI Long-fei¹; LI Jie1; LI Jiang¹; 1.College of Forestry and Horticulture,Xinjiang Agricultural University，Urumqi,Xinjiang 830052；
2.Shayidong Horticulture Farm,Xinjiang Bayingulun Mongolia Autonomous Prefecture，Korla,Xinjiang 841000

Keywords:: Korla Fragrant pear; planting density; photosynthetic characteristics; chlorophyⅡ fluorescence

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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Last Update: 2014-08-10