Chin J Plan Ecolo ›› 2016, Vol. 40 ›› Issue (8): 760-774.DOI: 10.17521/cjpe.2015.0464

• Research Articles • Previous Articles     Next Articles

Stoichiometric characteristics of carbon, nitrogen and phosphorus in Phyllostachys edulis forests of China

Man-Yi DU1,2,3, Shao-Hui FAN1,2,*(), Guang-Lu LIU1,2,*(), Huan-Ying FENG1,2,3, Bao-Hua GUO1,2,*, Xiao-Lu TANG1,2   

  1. 1International Centre for Bamboo and Rattan, Beijing 100102, China

    2Key Laboratory of Science and Technology of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China
    and
    3North China Foresty Experiment Center, Chinese Academy of Forestry, Beijing 102300, China
  • Online:2016-08-10 Published:2016-08-23
  • Contact: Shao-Hui FAN,Guang-Lu LIU,Bao-Hua GUO

Abstract:

Aims Stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) are important characteristics of the ecological processes and functions. Studies on population ecological stoichiometry can refine the content of flora chemometrics, determine the limited nutrient, and provide data for process-based modeling over large scale. Phyllostachys edulis is an important forest type, whose area accounts for 74% of total bamboo forest area in Southern China. However, little is known about the ecological stoichiometric in P. edulis. This study aimed to reveal C:N, C:P and N:P stoichiometry characteristics of the “plant-soil-litter” continuum and to provide a better understanding nutrient cycling and stability mechanisms in P. edulis forest in China. Methods The data were collected from the published literature containing C、N、P content in leaf or surface soil (0-20 cm) or littefall in P. edulis forests. Important findings 1) The leaf C, N, P content were estimated at 478.30 mg·g-1, 22.20 mg·g-1, 1.90 mg·g-1 in P. edulis, and the corresponding C: N, C: P and N: P were 26.80, 299.60 and 14.40, respectively. Soil C, N, and P content in 0-20 cm were 21.53 mg·g-1, 1.66 mg·g-1, 0.41 mg·g-1, with ratios of 14.20 for C:N, 66.74 for C:P and 4.28 for N:P. The C, N and P contents were 438.49 mg·g-1, 13.39 mg·g-1, 0.86 mg·g-1 for litterfall, with the litter C:N, C:P and N:P being 25.53, 665.67, 22.55, respectively. 2) In the plant-soil-litter system in P. edulis forest, leaf had higher C:N, litter had higher C:P and N:P, while soil were the lowest. The N, P resorption rate was 39.68% and 54.74%, indicating that P. edulis forest growth and development was constrained by P or by both of N and P in China. 3) N content and N:P in leaf showed a tendency to increase with latitude, while the C:N of leaf declined with latitude. N:P of leaf increased with longitude, but the P content and the C:N of leaf showed a opposite trend. C: N of soil increased with longitude, whereas the N content of soil declined longitude. The N content of litter declined with longitude. 4) The leaf N content was negatively correlated with mean annual temperature and mean annual precipitation, but being more sensitive to temperature than precipitation. The positive correlations between N content and latitude support “Temperature-Plant Physiological” hypothesis, reflecting an adaptive strategy to environmental conditions.

Key words: leaf, soil, litterfall, latitude, longitude, ecological stoichiometry