Chin J Plant Ecol ›› 2023, Vol. 47 ›› Issue (8): 1094-1104.DOI: 10.17521/cjpe.2022.0473

• Research Articles • Previous Articles     Next Articles

Effects of nitrogen addition and extended dry season on non-structural carbohydrates, nutrients and biomass of Dalbergia odorifera seedlings

SU Wei1,2, CHEN Ping2, WU Ting1, LIU Yue1, SONG Yu-Ting1, LIU Xu-Jun1, LIU Ju-Xiu1,*()   

  1. 1South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
    2Zhongkai University of Agriculture and Engineering, Guangzhou 510260, China
  • Received:2022-11-22 Accepted:2023-02-22 Online:2023-08-20 Published:2023-02-24
  • Contact: *LIU Ju-Xiu(
  • Supported by:
    National Natural Science Foundation of China(41991285);National Natural Science Foundation of China(32201367);National Natural Science Foundation of China(32101342);National Natural Science Foundation of China(41977287);Key Research and Development Program of Guangdong Province(2020B1111530004);Guangdong Provincial Finance Special for Forestry Project


Aims Nitrogen addition and extended dry season can profoundly affect non-structural carbohydrates (NSCs), carbon (C), nitrogen (N) and phosphorus (P) concentrations, and biomass of plants, however, the different responses of various organs (leaf, trunk, stem and root) in the same plants are not clear. We thus explored such responses to N addition and extended dry season to help better predict plant growth under global changes.

Methods The investigation was conducted with Dalbergia odorifera seedlings through a manipulated N and water experiment. The concentrations of NSCs and C, N, and P and allocation pattern of biomass in different organs of D. odorifera seedling were determined, and then compared among different treatments.

Important findings (1) N addition significantly increased trunk NSCs concentrations, while the interaction of N addition and extended dry season significantly decreased NSCs concentrations. N addition, extended dry season and their interaction significantly increased root soluble sugar concentrations. (2) N addition significantly increased root N concentrations and decreased C:N, and the interaction of N addition and extended dry season significantly decreased C:P and N:P in trunks. (3) All treatments did not influence the total biomass of D. odorifera, but significantly decreased the ratio of leaf biomass to total biomass, and N addition and extended dry season significantly decreased the ratio of root biomass to shoot biomass but increased the ratio of stem biomass to leaf biomass. Overall, N addition may promote the growth of seedling trunks and improve the economic value of D. odoriferaunder the extended dry season in the future. In order to prevent the growth of D. odorifera from being inhibited under drought stress, it is necessary to replenish an appropriate amount of water in the dry season.

Key words: nitrogen addition, extended dry season, non-structural carbohydrate, nutrient, biomass, Dalbergia odorifera