Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (2): 254-260.DOI: 10.3969/j.issn.1000-2561.2019.02.007

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Photosynthetic and Carbon Sequestration Characteristics of Michelia shiluensis Chun et Y. F. Wu

ZHANG Peng1,XU Yilin1,XI Ruchun1,2,*()   

  1. 1. College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong 510642, China
    2. Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, Guangzhou, Guangdong 510642, China
  • Received:2018-06-07 Revised:2018-09-29 Online:2019-02-25 Published:2019-05-16
  • Contact: XI Ruchun


In this study, two-year-old Michelia shiluensis grafting seedlings were studied. In order to evaluate the adaptation and its ecological effect of M. shiluensis, a LI-6400 portable photosynthetic system was used to measure the photosynthetic characteristics and estimate their carbon sequestration. The results showed that the variations of net photosynthetic rate (Pn) in M. shiluensis did not present a single bimodal in four seasons of a year. The change curve of January, April and July was bimodal, but that in October is unimodal. In different months, Pn changed from the largest to the smallest in the following order: October, July, April and January. M. shiluensis grew fastest in October. There was a higher photosynthetic rate in autumn with lower atmospheric temperature and weaker light intensity. The light compensation point was low and light saturation point was high, indicating that M. shiluensis could be adapted to different lighting environments. The annual average daily net solid carbon content was 10.07 g/(m 2·d), with strong carbon sequestration ability. The results indicate that M. shiluensis can be adapted to both the strong and weak lighting. Under hot weather conditions in South China, it also has the adaptive self-regulation mechanism of “siesta”, and had strong carbon sink ability, with good landscape efficiency and excellent ecological benefits, and it is suitable for planting in southern China.

Key words: Michelia shiluensis Chun et Y. F. Wu, photosynthesis, carbon sequestration

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