黎蕾, 蔡传涛, 刘贵周. 光强和施氮量对催吐萝芙木生长及生物量的影响[J]. 中国生态农业学报(中英文), 2010, 18(1): 57-61. DOI: 10.3724/SP.J.1011.2010.00057
引用本文: 黎蕾, 蔡传涛, 刘贵周. 光强和施氮量对催吐萝芙木生长及生物量的影响[J]. 中国生态农业学报(中英文), 2010, 18(1): 57-61. DOI: 10.3724/SP.J.1011.2010.00057
LI Lei, CAI Chuan-Tao, LIU Gui-Zhou. Effect of light intensity and nitrogen level on growth and biomass of Rauvolfia vomitoria[J]. Chinese Journal of Eco-Agriculture, 2010, 18(1): 57-61. DOI: 10.3724/SP.J.1011.2010.00057
Citation: LI Lei, CAI Chuan-Tao, LIU Gui-Zhou. Effect of light intensity and nitrogen level on growth and biomass of Rauvolfia vomitoria[J]. Chinese Journal of Eco-Agriculture, 2010, 18(1): 57-61. DOI: 10.3724/SP.J.1011.2010.00057

光强和施氮量对催吐萝芙木生长及生物量的影响

Effect of light intensity and nitrogen level on growth and biomass of Rauvolfia vomitoria

  • 摘要: 通过不同光强(15%、40%和70%自然光强)和施氮量(15 g·株-1、30 g·株-1和60 g·株-1)的盆栽试验, 研究了不同光照强度和施氮量对催吐萝芙木生长和生物量的影响。结果表明: 光强和施氮量显著影响催吐萝芙木的生长、单株生物量及生物量分配(P<0.05)。在70%自然光强下, 催吐萝芙木株高、地径、株高和地径的相对生长速率(RGRH, RGRD)、单株生物量都较15%和40%自然光强下高, 并分配更多的生物量到地下部分。在15%和40%自然光强下, 催吐萝芙木的株高、地径、RGRHRGRD、单株生物量随施氮量的增加而减小; 在70%自然光强下, 催吐萝芙木在30 g·株-1中等施氮量下生长最好, 单株生物量最大, 达559.6 g·株-1。在相同光强下, 催吐萝芙木根生物量比(RMR)和根冠比(R/S)随施氮量增加而减小, 比叶面积(SLA)和叶生物量比(LMR)在低光强和高施氮量下最大。从株高、地径、RGRHRGRD、单株生物量、RMRR/S等指标看, 70%自然光强和30 g·株-1的施氮量是催吐萝芙木最佳的光强和施氮量组合。

     

    Abstract: A potted experiment was conducted to study the growth and biomass of Rauvolfia vomitoria plant under different light intensities (15%, 40% and 70% of full sunlight) and nitrogen levels (15 g, 30 g and 60 g per plant). The results show that the growth, individual biomass and biomass allocation are significantly influenced by light intensity and nitrogen level (P<0.05). The plant height, ground diameter, relative growth rate of height and ground diameter (RGRH, RGRD) and individual biomass under 70% light intensity are higher than those under 15% and 40% light intensity, and more biomass is allocated to underground plant part. The height, ground diameter, RGRH, RGRD and individual biomass decrease with increasing nitrogen level under 15% and 40% light intensity. Under 70% light intensity, R. vomitoria plant grows best and individual biomass reaches the highest value of 559.6 g at 30 g nitrogen per plant. At the same light intensity, root mass ratio (RMR) and root to shoot ratio (R/S) decrease with increasing nitrogen level. On the other hand, specific leaf area (SLA) and leaf mass ratio (LMR) are highest at 15% light intensity and 60 g nitrogen per plant. Analysis on individual biomass, RMR, R/S and growth characteristics including height, ground diameter, RGRH, RGRD reveals that 70% light intensity and 30 g nitrogen per plant combination yields the optimum condition for R. vomitoria plants.

     

/

返回文章
返回