森林与环境学报2024，Vol.44Issue(3)：260-266,7.DOI:10.13324/j.cnki.jfcf.2024.03.005
干热河谷稀树灌丛藤本植物叶片养分重吸收特性
Leaf nutrient resorption by savanna liana species in a dry-hot valley in Yuanjiang,southwest China
摘要
Abstract
This study was conducted to measure leaf construction cost,morphological traits,and nitrogen and phosphorus concentrations in green and senesced leaves from 10 woody liana species in a Chinese savanna in southwest China.We analyzed the relationships among leaf construction cost,morphological traits,and nutrient resorption efficiencies.Our findings revealed a large variation in nutrient resorption efficiencies among species,and respective average values of nitrogen and phosphorus resorption efficiency of 48.0%and 46.2%.Phosphorus resorption efficiency correlated positively with nitrogen resorption efficiency across species(P<0.05).Nitrogen and phosphorus resorption efficiencies were significantly negatively correlated with leaf construction cost and leaf mass per area(P<0.05).Plants with lower leaf composition cost tend to increase nutrient resorption efficiencies.In contrast,plants with higher leaf construction cost reflect more conservative nutrient utilization strategies and lower nutrient resorption efficiencies.Our results suggest a divergence in growth history strategies,reflecting a slow-fast continuum of growth among Chinese savanna liana species growing in persistently dry and hot habitats.关键词
干热河谷/稀树灌丛/藤本植物/养分重吸收效率/叶片构建成本/比叶重Key words
dry-hot valley/savanna/liana species/nutrient resorption efficiencies/leaf construction cost/specific leaf mass分类
农业科技引用本文复制引用
李雪楠,李振学,李发文,温韩东,张树斌..干热河谷稀树灌丛藤本植物叶片养分重吸收特性[J].森林与环境学报,2024,44(3):260-266,7.基金项目
云南省林业和草原局极小种群保护项目"元江干热河谷三个极小种群野生植物物种保护实践"(2021SJ14X-13) （2021SJ14X-13）
云南省中青年学术和技术带头人后备人才项目(202405AC350012). （202405AC350012）
