磷添加对早熟禾叶片化学计量特征和养分重吸收效率的影响

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中图分类号：S544.9 文献标识码：A 文章编号：1007-0435（2026）03-0949-11

doi：10.11733/j.issn.1007-0435.2026.03.019

引用格式：，等.磷添加对早熟禾叶片化学计量特征和养分重吸收效率的影响[J].草地学报，2026，34（3）： 949-959 WANG Xiao-li，WANGQian，XU Hang，etal.Efectsof Phosphorus Addition on Stoichiometric Traits and Nutrient Resorption Efficiency in Bluegrass Leaves[J].Acta Agrestia Sinica，2O26，34（3）：949-959

Abstract：In this study，Poa pratensis var. Qinghai was used as the research subject. The changing trends in leaf stoichiometric ratios and nutrient resorption eficiency under six phosphorus（P）addition levels （30，45， 60，75，90，and 105kg⋅hm-2 ，sequentially labeled as P1 ， P2 ， P3 ， P4 ， P5 ，and P6 ）were investigated.The results indicated：（1） The leaf carbon（C），nitrogen（N），and P contents generally exhibited the pattern of senescent stage < full ripeness stage < milky ripeness stage，with the highest accumulation of leaf nutrient contents observed under the P3 level.（2）Leaf C/N and C/P ratios generally followed the pattern of senescent stage > full ripeness stage > milky ripeness stage，while the N/P ratio generally showed full ripeness stage > milky ripeness stage > senescent stage. （3） The Nitrogen Reabsorption Efficiency（NRE） was the highest under the CK（control，no P addition） treatment，whereas the Phosphorus Reabsorption Eficiency（PRE）was the highest under the P2 addition level. （4）A generally positive correlation was observed between leaf NRE and stoichiometric ratios，while PRE exhibited a generally negative corelation with stoichiometric ratios in mature leaves and a generally positive correlation with stoichiometric ratios in litter leaves.This study suggests that the appropriate P addition amount is P2-P3 1 （45～60kg⋅hm-2） . This research provides practical guidance for precision fertilization and scientific management of artificial grasslands in alpine regions.

Key words： Poa pratensis var. Qinghai; Phosphorus adition; Phenological stages; Ecological stoichiometry; Nutrient reabsorption efficiency

植物叶片的碳（C）、氮（N）、磷（P）含量和化学计量比在维持植物生长、代谢以及适应环境方面起着重要作用[1]。（剩余23906字）