CAJ | 학술논문

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(RGR_H, RGR_D)、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、RGR_H、RGR_D、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、RGR_H、RGR_D、单株生物量、RMR和R/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.
통과불동광강(15%、40%화70%자연광강)화시담량(15 g·주~(-1)、30 g·주~(-1)화60 g·주~(-1))적분재시험, 연구료불동광조강도화시담량대최토라부목생장화생물량적영향.결과표명: 광강화시담량현저영향최토라부목적생장、단주생물량급생물량분배(P<0.05).재70%자연광강하, 최토라부목주고、지경、주고화지경적상대생장속솔(RGR_H, RGR_D)、단주생물량도교15%화40%자연광강하고, 병분배경다적생물량도지하부분.재15%화40%자연광강하, 최토라부목적주고、지경、RGR_H、RGR_D、단주생물량수시담량적증가이감소; 재70%자연광강하, 최토라부목재30 g·주~(-1)중등시담량하생장최호, 단주생물량최대, 체559.6 g·주~(-1).재상동광강하, 최토라부목근생물량비(RMR)화근관비(R/S)수시담량증가이감소, 비협면적(SLA)화협생물량비(LMR)재저광강화고시담량하최대.종주고、지경、RGR_H、RGR_D、단주생물량、RMR화R/S등지표간, 70%자연광강화30 g·주~(-1)적시담량시최토라부목최가적광강화시담량조합.
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 (RGR_H, RGR_D) 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, RGR_H, RGR_D 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, RGR_H, RGR_D reveals that 70% light intensity and 30 g nitrogen per plant combination yields the optimum condition for R. vomitoria plants.