天然锐齿栎林下紫花碎米荠的生长特性

Growth Performance of Cardamine Tangutorum O.E. Schulz Under Quercus Aliena var. Acuteserrata Forest in Baotianman

紫花碎米荠是伏牛山区重要的山野菜之一。通过人工控制实验的方法,研究不同郁闭度锐齿栎林下种植密度对紫花碎米荠株生长特性的影响。结果表明:紫花碎米荠株高、个体地上部分生物量、个体根生物量均随郁闭度增加而增加,随种植密度增大而下降;群体生物量随郁闭度的增加而增加,但随种植密度先增加后下降,最大值出现在高密度的D5(即株行距15 cm×15 cm种植)处理;根冠比在不同郁闭度下差异不明显,随种植密度的增加而增加。因此,就宝天曼地区而言,锐齿栎-紫花碎米荠林菜复合种植模式应在郁闭度较大锐齿栎林下以高密度推广种植。

Cardamine tangutorum O.E.Schulz is one of the most important wild vegetable in Funiu mountain areas,and its utilization relates to sustainable development of nature reserve and economic development of local residents.Effects of canopy openness and planting density on the individual height,aboveground biomass,root biomass,population biomass and root/shoot ratio of Cardamine tangutorum O.E.Schulz were studied.The results showed that the height,individual aboveground biomass,individual root biomass increased with the canopy openness increment,while decreased with planting density increment.The population biomass increased sharply but declined with planting density increment,with the highest value under D5（15 cm×15 cm） treatment.The population biomass of Cardamine tangutorum O.E.Schulz increased with canopy openness increment.The ration of root to shoot increased with planting density increment,but no difference among the different canopy openness treatments.Hence,it is fit to plant Cardamine tangutorum O.E.Schulz under higher canopy openness Quercus aliena var.acuteserrata forest in Baotianman area.