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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (25): 90-95.doi: 10.11924/j.issn.1000-6850.casb15030186

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Study on Photosynthetic Ability of Different Shoot Types of White Crabapple

  

  • Received:2015-03-23 Revised:2015-08-01 Accepted:2015-06-12 Online:2015-09-23 Published:2015-09-23

Abstract: The study aims to explore and compare the photosynthetic ability of different shoot types of white crabapple. The ability of photosynthesis of shoot type of white crabapple was studied by measurement and mathematical simulation. The maximal photosynthetic rate of long shoot, middle shoot and short shoot was 16.3, 14.5 and 9.68 μmol/(m2 ·s), respectively; and the quanta efficiency of photosynthesis of the three shoot types was 0.053, 0.047 and 0.042 μmol/μmol, respectively. The results showed that the photosynthesis ability of long shoot was higher than that of middle and short shoot. The total photosynthesis per unit grand area was 18.82, 5.19 and 1.73 μmol/(m2·s) of long shoot, middle shoot and short shoot, respectively, with PAR equal to 1500 μmol/(m2·s) on the top canopy. The results indicated that long shoot was conducive to improve fruit tree photosynthesis (about 73.15%) with high photosynthetic rate and leaf area.