Fujian Journal of Agricultural Sciences ›› 2019, Vol. 34 ›› Issue (2): 162-169.doi: 10.19303/j.issn.1008-0384.2019.02.004

• Crop Science • Previous Articles     Next Articles

Effects of Nitrogen and Phosphorus Additions on Growth and Chlorophyll Fluorescence Indices of Polygonum multiflorum

LIU Xiao1, HAN Yan-feng1, YANG Shu-jun1, JI La-la1, WANG Rui-jie1, JIANG Xue-hai2, WANG Jian-jian1   

  1. 1. College of Life Sciences Guizhou University, Guiyang, Guizhou 550025, China;
    2. Rice Research Institute, Guizhou Academy of Agricultural Sciences, Guiyang, Guizhou 550025, China
  • Received:2018-12-24 Revised:2019-02-02 Online:2019-04-30 Published:2019-04-30

Abstract: [Objective] Effects of N and P additions on the growth and chlorophyll fluorescence indices of Polygonum multiflorum were studied to provide a guideline for proper fertilization to promote the plant growth. [Method] N and P addition, i.e., (1) N application using 2.7g urea/plant, (2) P application using 14.4g superphosphate/plant, (3) N+P application using 2.7 g urea and 14.4 g superphosphate on each plant, or (4) control without added N or P, was incorporated in the potting soil to observe the resulting growth and chlorophyll fluorescence indices of the plants. [Result] The treatments increased the leaf count, single leaf area, petiole length, and height of the plants in the order of N+P application > P application > N application > control. The addition of N+P significantly increased the biomass accumulation, proportion of above-ground biomass, and chlorophyll content as well as the indices of Fv/Fm, qP and ETR, with a decreased qN. Compared to control, N+P treatment affected the most on chlorophyll with a 96.08% increase and on qN with a 29.16% reduction. [Conclusion] Addition of both N and P in the potting soil significantly promoted the growth and photosynthesis of P. multiflorum.

Key words: Polygonum multiflorum, nitrogen and phosphorus addition, growth, chlorophyll fluorescence indices

CLC Number: 

  • S567.21