文献类型：期刊文献

英文题名：Nutrient resorption based on different estimations of five perennial herbaceous species from the grassland in inner Mongolia, China

作者：Huang, J. Y.[2,3,4] Yu, H. L.[5] Wang, B.[6] Li, L. H.[1] Xiao, G. J.[4] Yuan, Z. Y.[1]

第一作者：Huang, J. Y.

通信作者：Yuan, ZY[1]

机构：[1]Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China;[2]Chinese Acad Sci, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Water & Soil Conservat, Yangling 712100, Peoples R China;[3]Minist Water Resources, Yangling 712100, Peoples R China;[4]Ningxia Univ, Ctr New Technol Applicat & Res, Yinchuan 750021, Peoples R China;[5]Ningxia Univ, Coll Resources & Environm, Yinchuan 750021, Peoples R China;[6]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China

年份：2012

卷号：76

期号：1

起止页码：1-8

外文期刊名：JOURNAL OF ARID ENVIRONMENTS

收录：;Scopus(收录号：2-s2.0-80054030585);WOS:【SCI-EXPANDED(收录号:WOS:000297139700001)】；

基金：Supported by the National Nature Science Foundation of China (31000215, 30600076), State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau (10501-294) and New Century Excellent Talents in University (NCET-09-0859).

语种：英文

外文关键词：Nutrient conservation; Nutrient cycling; Nutrient loss; N-fertilization gradients; Temperate grassland

摘要：Nutrient resorption at leaf level (leaf mass and leaf area) and at plant level were investigated for five temperate grassland species in a 4-years N-fertilization experiment (8 levels: 0, 1, 2, 4, 8, 16, 32, 64 g N m(-2) year(-1)). Along N gradients, N concentrations in senescing tissues for all species increased; P concentrations in senescing leaves of Cleistogenes squarrosa, Potentilla acaulis and Artemisia frigida also increased in low N-addition plots but decreased in high N-addition plots. By contrast, the changes in P concentrations displayed insignificant trends for other two species in most cases; leaf-based N-resorption efficiency (NRE) generally decreased, whereas NRE at plant level did not show a clear trend in most species; leaf-based P-resorption efficiency (PRE) in C. squarrosa and P. acaulis showed decreasing trends, whereas PRE at plant level generally showed an insignificant relationship in most species. The findings suggested that the response of N-resorption was more dependent on methods and less on species than that of P-resorption. Both NRE and PRE estimated from leaf mass- and leaf area- levels were higher than those from plant level, indicating that different calculations can yield various patterns of nutrient-resorption in relation to soil N availability. (C) 2011 Elsevier Ltd. All rights reserved.