干热河谷稀树灌丛藤本植物叶片养分重吸收特性OA北大核心CSTPCD

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.