To explore the changes in leaf morphological characteristics and nutrient content of Pleioblastus amarus during its expansion into tea gardens,and reveal the adaptation strategies and nutrient acquisition charac-teristics,the study analyzed the response of leaf functional traits of 1-year-old and 2-year-old P.amarus during the expansion of P.amarus into tea garden.Four plots were established:P.amarus forest central area(BF),P.amarus forest interface area(BA),mixed forest interface area(MA),and mixed forest center area(TB).The findings re-vealed that along the direction of the expansion of P.amarus to the tea plantation,the leaf morphology of 1-year-old bamboo showed a trend of gradual increase,and the performance was the highest in the TB sample site,but the leaf morphology of 2-year-old bamboo showed a"V"-shaped change with the expansion of P.amarus to the tea plantation,and the performance of each index was the lowest in the BA sites;the values of the specific surface area of the leaf and the fluctuating asymmetricity of the leaf area of 1-year-old bamboo decreased significantly in the BA sites,but the differences of this index among the sample sites were not significant in 2-year-old bamboo.The CNP content of the 1-year-old bamboo leaf was significantly higher than that of other samples in the BA sites,while the CN content of the 2-year-old bamboo leaves showed the opposite behavior.The C∶N,C∶P,and N∶P of leaves of different ages of standing bamboo showed a"V"type change along the direction of the expan-sion of P.amarus to the tea plantation,and decreased significantly in the BA sites.The leaf width,leaf area,leaf thickness,leaf dry weight,and specific leaf area indexes of 1-year-old bamboo were gradually higher than those of 2-year-old bamboo with expansion,and the differences were obvious in the TB sites;the CNP content of 1-year-old bamboo was higher than that of 2-year-old bamboo among all the sampling plots,but the performance of C∶N,C∶P and N∶P was opposite,and all the indexes showed obvious age differences in the BA sites.Overall,the trade-off relationships among functional traits of P.amarus leaves were adaptively adjusted along the direc-tion of expansion,with significant age effects in the bamboo-tea interface region where resource competition is in-tense.
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