应用生态学报2017，Vol.28Issue(6)：1793-1800,8.DOI:10.13287/j.1001-9332.201706.036
黄土丘陵区草本植物叶片与枯落物生态化学计量学特征
Ecological stoichiometry of leaf and litter of herbaceous plants in loess hilly and gully regions, China
摘要
Abstract
This study was conducted in the forest,forest-steppe and steppe vegetation zones along the Yanhe River Basin,where the leaf and litter samples from four dominant herbaceous plants including Lespedeza davurica,Stipa bungeana,Artemisia sacrorum,Artemisia giraldii were taken.By measuring the concentrations of carbon (C),nitrogen (N),phosphorus (P) and potassium (K),we measured the concentrations and their ratios to explore the limit and resorption of nutrient in the herbaceous plants.The results showed that the leaf N/P of four herbaceous plants was all lower than 14,suggesting their growth was mainly limited by N content.Except for L.davurica,the mean nutrient resorption efficiency of K,N and P in the other three plants was 79.9％,48.7％ and 32.5％,respectively.The higher nutrient resorption efficiency and K concentration in the leaf were beneficial for soil water competition of A.sacrorum and A.giraldii.The litter C/N in A.sacrorum was significandy lower than that in S.bungeana and A.giraldii,which was easy to decompose to benefit the nutrient recycling.This resulted in the wide distribution of A.sacrorum in the three vegetation areas.关键词
草本植物/叶片/枯落物/养分再吸收效率/植被恢复Key words
herbaceous plant/leaf/litter/nutrient reabsorption efficiency/vegetation recovery引用本文复制引用
刘洋,曾全超,安韶山,李鑫,黄懿梅..黄土丘陵区草本植物叶片与枯落物生态化学计量学特征[J].应用生态学报,2017,28(6):1793-1800,8.基金项目
本文由国家自然科学基金项目(41671280)和水利部公益性行业专项经费项目(201501045)资助 This work was supported by the National Natural Science Foundation of China (41671280),and the Public Welfare Industry Research Project of Chinese Ministry of Water Resources (201501045). （41671280）
