Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (7): 1490-1497.DOI: 10.3969/j.issn.1000-2561.2020.07.028

• Agricultural Ecology & Environmental Protection • Previous Articles     Next Articles

Variations of Canopy Temperature in a Rubber Plantation in Western Hainan Island and Their Relations with Micrometeorological Factors

DENG Cong1,2,3,WU Zhixiang2,3,*(),TAN Zhenghong1,3,LIAO Liguo1,CUI Yibin1,CHENG Juan1,ZHAO Linlin1   

  1. 1. Hainan University, Haikou, Hainan 570228, China
    2. Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Rubber Tree Biology, Ministry of Agriculture and Rural Affairs, Haikou, Hainan 571101, China
    3. Danzhou Investigation Experiment Station of Tropical Crops, Ministry of Agriculture and Rural Affairs, Danzhou, Hainan 571737, China
  • Received:2019-07-11 Revised:2019-10-22 Online:2020-07-25 Published:2020-08-24
  • Contact: WU Zhixiang


Canopy temperature is one of the most important parameters to characterize the physiological, ecological processes and energy balance of plants. In order to investigate the variation of the canopy temperature in tropical forests at different time scales and to preliminarily analyze the relationship between environmental factors and canopy temperature, an infrared temperature sensor was used to measure the canopy temperature of a rubber plantation in Western Hainan Island in 2017. Based on the annual canopy temperature data and synchronous canopy micrometeorological data, the characteristics of canopy temperature (Tc) and air temperature (Ta) of a rubber plantation in dry and wet seasons were analyzed, and the micrometeorological factors were discussed. The daily change of canopy temperature in a rubber plantation was a single-peak curve every month. Compared with Ta, Tc had obvious characteristics of phase forward and intensified change. During the day, the canopy boundary layer was unstable, and the canopy was the heat source of SPAC (Soil-Plant-Atmosphere Continuum), at night, the canopy boundary layer was inversion stratification, which was stable, and the canopy was the cold source of SPAC. The canopy temperature in wet seasons was higher than that in dry seasons. If only Ta was considered, Tc and Ta had a good linear relationship, and the linear equation was Tc= 1.03Ta-0.656. If the micro-meteorological factors such as atmospheric temperature (Ta), net radiation (Rn), relative humidity (RH) and wind speed (V) were taken into account, the multiple correlation coefficients showed that the annual correlation was very significant. Partial correlation coefficients showed that the change of canopy temperature in dry seasons was mainly affected by Ta, Rn and RH, and secondly by V. Wet seasons were mainly affected by Ta and RH, the influence of Rn and V was negligible. The results preliminarily revealed the annual variation of canopy temperature in rubber plantation and its relationship with many micro-meteorological factors, providing a scientific basis for further exploring the change of canopy temperature and its influencing mechanism.

Key words: canopy temperature, rubber plantation, micrometeorology, daily variation

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