了哥王(Wikstroemia indica)的生态生物学特征

对了哥王的生态生物学特征研究表明 ,了哥王分布区气候条件温暖湿润 ,生境主要为草坡和开旷林地 .了哥王耐贫瘠 ,是一种阳生性灌木 ,其光合速率平均为 7.33μmolCO2 ·m-2 ·s-1.其竞争力明显弱于同在灌草丛中分布的桃金娘 .因而在灌草丛阶段的演替过程中 ,其种群减少 ,桃金娘种群增长 .了哥王体内加权平均养分含量为N 0 .6 6 7% ,P 0 .0 81% ,K 0 .5 4 0 % ,Ca 0 .776 % ,Mg 0 .2 5 9% .种群生物量分析表明 ,荒坡上野生了哥王生物量较低 ,仅 0 .0 2 73t·hm2 .若要大量开发了哥王资源 ,需要人工种植以提高生产量 .

Ecological and biological characteristics of Wikstroemia indica

Wikstroemia indica was the common shrub with medicine use in subtropical and tropical zones. The studies on the biological and physiological characteristics, population dynamics, biomass, nutrient composition of Wikstroemia indica showed that Wikstroemia indica was widely dispersed over hilly lands and opened forests. It was heliophytes and grew well on improverished soil. Its average photosynthetic rate and conductance were 7.33 mumolCO2.m-2.s-1 and 0.042 molH2O.m-2.s-1, respectively. The weighted nutrient concentration of Wikstroemia indica were N 0.667%, P 0.081%, K 0.540%, Ca 0.776%, and Mg 0.259%, respectively, and the medicine ingredient was Wikstroemine C16H12O5. Due to morphological difference, the competitive power on energy and nutrient of Wikstroemia indica was less than that of Rhodomyrtus tomentosa. Wikstroemia indica population decreased, while Rhodomyrtus tomentosa increased on shrubby grass land during early successional stage. Wikstroemia indica could be planted to increase its biomass to exploit medicine use.