土壤肥力对绞股蓝种群行为的影响

利用半控制实验生态学方法探讨土壤肥力对绞股蓝种群行为的影响。结果表明：土壤肥力的提高可显著提高繁殖器官生物量分配比，显著降低非繁殖器官生物量分配比，叶片、支持结构生物量分配随土壤肥力的提高略有降低；提高土壤肥力对绞股蓝种群形态特征和平均相对生长速率的影响不明显；多数繁殖特征对土壤肥力的提高有显著响应。总之，绞股蓝种群的不同行为对土壤肥力变化的敏感性各异

Effects of Soil Fertility on Gynostemma pentaphyllum Makino Population Behavior

The authors examined the response of G. pentaphyllum population behavior to soil fertility, using the semi controlled experimental method. The results show that the increase of soil fertility can significantly increase the biomass allocation ratio of reproductive organs, and decrease that of non reproductive organs, that the ratios of foliage and supporting parts decrease little with increasing soil fertility; that the increase of soil fertility does not significantly affect the morphological characters and mean relative growth rate of the populations; that most of the reproductive characters respond to the increase of soil fertility significantly. The conclusion is: different behaviors of the G. pentaphyllum populations have different sensitivities to the change of soil fertility.