Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (11): 2097-2104.DOI: 10.3969/j.issn.1000-2561.2019.11.001

• Crop Culture and Nutrition, Genetic Breeding •     Next Articles

Effects of Water-retention Treatment on the Physiological Characteristics and Latex Yield of Hevea brasiliensis

YUAN Huifang,HUANG Jing,YUE Hai,TIAN Yaohua()   

  1. Yunnan Institute of Tropical Crops, Jinghong, Yunnan 666100, China
  • Received:2019-03-15 Revised:2019-05-29 Online:2019-11-25 Published:2019-11-28
  • Contact: Yaohua TIAN


Rubber tree variety ‘Yunyan 77-4’ was selected as the test material. With conventional management (without covering) as the control, covering film, covering grass and adding water-retaining agent were adopted as the three water-retaining treatments. Through field comparative experiments, the effects of different treatments on the physiological characteristics of leaves and latex yield at different growth stages of rubber tree in the whole year were studied. The results of variance analysis showed that covering film, covering grass and adding water retaining agent significantly increased soil water content in dry season, and significantly affected the contents of soluble protein (SP), proline (Pro), soluble sugar (SS) and sucrose (Suc) in the leaves of rubber trees. The yield of latex increased by the three water retaining treatments. Principal component analysis showed that the cumulative contribution rate of the first three principal components was 84.8%, indicating that the first three principal components could reflect most of the information of original variables. According to the comprehensive score, the order of the advantages and disadvantages of each treatment was as follows: adding water-retaining agent, covering grass, covering film and the control. The order of comprehensive performance of physiological indexes of rubber leaves at different growth stages in the whole year was as follows: December, March, January-February, November, June, July, September-October, August, May and April. Therefore, it can be inferred from the results that all water conservation treatments can effectively alleviate the adverse effects of seasonal drought on the growth of rubber trees. In terms of production, a reasonable tapping period can be selected according to the comprehensive performance of physiological indexes of leaves at different growth stages throughout the year.

Key words: Hevea brasiliensis, water-retention treatment, soil moisture content, physiological characters, comprehensive evaluation, yield