生态学杂志2024，Vol.43Issue(3)：749-757,9.DOI:10.13292/j.1000-4890.202403.012
不同海拔花椒叶片-凋落物养分化学计量与重吸收的关系
Relationship between leaf-litter nutrient stoichiometry and resorption of Zanthoxylum planispinum var.din-tanensis at different altitudes
摘要
Abstract
Clarifying the stoichiometric characteristics of leaves and litters and nutrient resorption efficiency is help-ful to understanding the mechanisms of nutrient conservation and utilization of Zanthoxylum planispinum var.din-tanensis at different altitudes in the Guizhou karst plateau canyon area.Leaves and litters of Zanthoxylum planispi-num var.dintanensis at different altitudes(531,640,780,871,and 1097 m)were collected.The differences of nutrient concentration,stoichiometry and nutrient resorption efficiency with increasing altitude were analyzed,and the relationship between nutrient resorption and stoichiometry was elucidated.The results showed that the concentra-tions of organic carbon(OC),total phosphorus(TP),and total iron(TFe)in leaves and litters were highest at the altitude of 780 m.The total manganese(TMn)and total magnesium(TMg)concentrations in leaves,and TMg concentration in litters showed an increasing trend with altitude.Total nitrogen(TN),total potassium(TK)and total calcium(TCa)concentrations in both leaves and litters did not vary with altitude.With increasing altitude,leaf and litter C:P,Fe:Mn,and C:Ca showed a trend of increasing first and then decreasing,while Ca:Mg showed a decline trend.Nutrient resorption efficiency in leaves was not completely consistent with altitude variation.The P and K resorption efficiencies at the altitude of 780 m were the highest,while the N,Fe,and Mn resorption efficiencies were highest at 871 m.The Ca and Mg resorption efficiencies at 1097 m were significantly higher than those at other altitudes.The resorption efficiencies of P,N,and Fe at 1097 m were all negative.The results of redundancy analysis showed strong correlations between leaf nutrient resorption efficiency and stoichiometry.关键词
顶坛花椒/化学计量/养分重吸收/海拔/喀斯特石漠化区Key words
Zanthoxylum planispinum var.dintanensis/stoichiometry/nutrient resorption/altitude/karst rock desertification引用本文复制引用
邓雪花,喻阳华,熊康宁,张仕豪,孔令伟..不同海拔花椒叶片-凋落物养分化学计量与重吸收的关系[J].生态学杂志,2024,43(3):749-757,9.基金项目
贵州省科技计划重大专项(黔科合平台人才[2017]5411号)和贵州省科技支撑计划项目(黔科合支撑[2022]一般103)资助. （黔科合平台人才[2017]5411号）
