%0 Journal Article %T Effect of light intensity and nitrogen level on growth and biomass of Rauvolfia vomitoria
光强和施氮量对催吐萝芙木生长及生物量的影响 %A LI Lei %A CAI Chuan-Tao %A LIU Gui-Zhou %A
黎蕾 %A 蔡传涛 %A 刘贵周 %J 中国生态农业学报 %D 2010 %I %X 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. %K Rauvolfia vomitoria %K Growth %K Biomass %K Light intensity %K Nitrogen fertilization level
催吐萝芙木 %K 生长 %K 生物量 %K 光强 %K 施氮肥量 %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=3136B48C99EDAF41485ED52C2E3EC268&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=CA4FD0336C81A37A&sid=11B4E5CC8CDD3201&eid=1D0FA33DA02ABACD&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=18