%0 Journal Article
%T Relationship between leaf phosphorus concentration and soil phosphorus availability across Inner Mongolia grassland<br>内蒙古草地叶片磷含量与土壤有效磷的关系
%A GENG Yan
%A WU Yi
%A HE Jin-Sheng
%A <br>耿燕
%A 吴漪
%A 贺金生
%J 植物生态学报
%D 2011
%I Editorial Office of Chinese Journal of Plant Ecology
%X Aims Phosphorus status and N/P stoichiometry in plant leaves have been studied intensively with recent focus on large-scale patterns and driving factors. Studies of Chinese terrestrial plants found that leaf P was considerably lower than the global average, resulting in a higher N/P, probably due to the low soil total P content at the national scale. Inner Mongolia grassland offers a diverse array of taxa and soil conditions to examine the correlation between leaf and soil P concentrations. Our objective was to determine how and to what extent soil total and available P modify leaf P across the study region. Methods Leaf samples of 57 species were collected at 36 sites across Inner Mongolia grassland during July and August 2007. We determined leaf P concentration, N/P, soil total and available P concentrations and tested pairwise relationships between leaf and soil variables at species-by-site, inter-specific and inter-site levels. Important findings Findings of relatively low leaf P and high N/P across Inner Mongolia grassland were consistent with previous findings. Neither soil total nor available P appeared to be related with leaf P concentration, although soil available P had a stronger explanatory power than soil total P content. Moreover, Inner Mongolian grassland did not show a great shortage of soil available P compared with USA, Australia and the global average. The hypothesis that low leaf P and high N/P of plants are caused by low soil P content do not hold in Inner Mongolian grassland. Instead, neither soil total nor available P shapes the pattern of leaf P and N/P across this grassland.
%K Inner Mongolia grassland
%K leaf N/P
%K leaf P concentration
%K soil available P content
%K soil total P content<br>内蒙古草地
%K 叶片N/P
%K 叶片P含量
%K 土壤有效P含量
%K 土壤全P含量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=E73630EB51156772A80AD982D88A24E0&yid=9377ED8094509821&vid=6209D9E8050195F5&iid=CA4FD0336C81A37A&sid=CA4FD0336C81A37A&eid=5D311CA918CA9A03&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=2&reference_num=98