土壤2017，Vol.49Issue(2)：364-370,7.DOI:10.13758/j.cnki.tr.2017.02.023
干湿度梯度及植物生活型对土壤氮磷空间特征的影响
Effects of Humidity/Aridity Gradient and Vegetation Form on Spatial Characteristics of Soil Nitrogen and Phosphorus in China
摘要
Abstract
In this paper, the impact of humidity/aridity gradient and vegetation form on the spatial distribution on soil nitrogen (N) and phosphorus (P) contents and N∶P ratio in China were discussed. The results showed that N and P contents and N∶P ratio of natural soil of terrestrial ecosystems in China were 0.02–8.78 g/kg, 0.05–1.73 g/kg and 0.06–9.85, respectively. The spatial variabilities of N and P contents and N∶P ratio were further significantly influenced by topography and climate. Humidity/ aridity gradient had greater effect on N content and N∶P than on P content. N content and N∶P showed obvious gradient change characteristics with an order of humid region > semi-humid region > arid region > semi-arid region, while P content change was not significant. The variations of N and P in forest soil were more complex than those in shrub and herb. The average content of plant phosphorus was lower than the national average, may indicating forest ecosystem limited by P is attributed to low soil P content. Correlation and stepwise regression analyses proved precipitation controls the variation of N and P contents and N∶P ratios.关键词
干湿度梯度/土壤氮磷/植物生活型/化学计量/回归分析Key words
Humidity/aridity gradient/Soil N and P/Vegetation form/Ecological stoichiometry/Regression analysis分类
天文与地球科学引用本文复制引用
卢同平,张文翔,武梦娟,林永静..干湿度梯度及植物生活型对土壤氮磷空间特征的影响[J].土壤,2017,49(2):364-370,7.基金项目
国家自然科学基金项目(41461015)、云南省中青年学术技术带头人后备人才项目(2015HB029)和云南省水利厅项目(2014003)资助. （41461015）
