贵州省东南部土壤氮磷对常见森林群落植物叶片养分化学计量学特征.pdfVIP

贵州省东南部土壤氮磷对常见森林群落植物叶片的 养分化学计量学特征 刘晓玲，李世杰 （贵州省林业调查规划院，贵州贵阳 550000 ） 摘要：贵州省东南部地区是我省主要生产木材的产区之一，分析该区域内土壤的碳、磷含量对常见森林群落植物 叶片化学计量特征的影响，有助于改善该区域内的森林经营措施。本研究测定了贵州省东南部常见森林群落植物 叶片的养分（即C、N 、P ）的含量，综合分析了土壤碳（C ）、氮（N ）含量及C ：N 对植物叶片的养分含量和化 学计量特征的影响情况。研究结果表明，研究区域内植物叶片C、N 含量的算术平均数分别为61.6461g·kg-1、7.0807 -1 -1 g·kg ，叶片P 含量的几何平均数为 1.2410g·kg 。土壤N:P 与植物N 含量及N:P 呈极显著正相关关系，与植物P 呈极显著负相关关系。研究指出，在贵州省东南部地区，土壤N:P 是影响植物生长的主要限制因素。 关键词：生态化学计量，土壤碳磷元素，叶片养分，养分限制，贵州省东南部 Effect of Soil Nitrogen and Phosphorus on Leaf N and P Stoichiometry of Common Forest Communities in Southeastern Guizhou LIU Xiaoling, LI Shijie (Guizhou Forestry Survey and Planning Institute, Guiyang 550003, China) Abstract ：Southeastern Guizhou region is one of the main timber producing areas in Guizhou province. To analyzed the effect of soil carbon, phosphorus content on leaf N and P stoichiometry of common forest communities will help to improve forest management in this area. Leaf C, N and P content for common forest communities in Southeastern Guizhou were measured and effect of soil C, N and C: N ratio on n leaf N and P stoichiometry of common forest communities was analyzed. The study indicated that the -1 -1 -1 arithmetic means for all species were 61.6461 g·kg , 7.0807 g·kg and 1.2410 g·kg for C, N and P. There were significantly positive correlations between soil N: P ratio and leaf N Content, N: P ratio, respectively, but significantly negative correlation between soil N: P ratio and leaf P Content. The conclusion is that soil N: P ratio is one of the main factors limiting