广西大石围天坑群植物叶片养分特征及其适应性

郑莉莉, 余林兰, 戴萍, 薛跃规, 龙萍

Nutrient characteristics and adaptability of plant leaves in Tiankeng Complex of Dashiwei, Guangxi, China

ZHENG Li-Li, YU Lin-Lan, DAI Ping, XUE Yue-Gui, LONG Ping

图5 广西大石围天坑群植物叶片养分与环境因子冗余分析(RDA)。AL, 海拔; C, 叶片碳含量; Ca, 叶片钙含量; K, 叶片钾含量; Mg, 叶片镁含量; N, 叶片氮含量; P, 叶片磷含量; pH, 土壤酸碱度; SC, 土壤碳含量; SC:N, 土壤碳氮比; SC:P, 土壤碳磷比; SL, 坡度; SN, 土壤氮含量; SN:P, 土壤氮磷比; SP, 土壤磷含量; SWC, 土壤含水量。序号1-5为天坑坑内样地, 6-14为坑外样地。

Fig. 5 Redundancy analysis (RDA) of plant leaf nutrients and environmental factors in Dashiwei Tiankeng Complex, Guangxi. AL, altitude; C, leaf carbon content; Ca, leaf calcium content; K, leaf potassium content; Mg, leaf magnesium content; N, leaf nitrogen content; P, leaf phosphorus content; pH, soil pH; SC, soil carbon content; SC:N, soil carbon-nitrogen ratio; SC:P, soil carbon-phosphorus ratio; SL, slope; SN, soil nitrogen content; SN:P, soil nitrogen-phosphorus ratio; SP, soil phosphorus content; SWC, soil water content. Serial numbers 1-5 are the sample plots inside the Tiankeng, and 6-14 are the sample plots outside the Tiankeng.