草地学报2026，Vol.34Issue(3)：949-959,11.DOI:10.11733/j.issn.1007-0435.2026.03.019
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
Effects of Phosphorus Addition on Stoichiometric Traits and Nutrient Resorp-tion Efficiency in Bluegrass Leaves
摘要
Abstract
In this study,Poa pratensis var.Qinghai was used as the research subject.The changing trends in leaf stoichiometric ratios and nutrient resorption efficiency under six phosphorus(P)addition levels(30,45,60,75,90,and 105 kg·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 con-tents 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 Efficiency(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 correlation 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(45～60 kg·hm-2).This research provides practical guidance for precision fertilization and scientific management of artificial grasslands in alpine regions.关键词
'青海'扁茎早熟禾/磷添加/生长时期/生态化学计量/养分重吸收Key words
Poa pratensis var.Qinghai/Phosphorus addition/Phenological stages/Ecological stoichiometry/Nutrient reabsorption efficiency分类
农业科技引用本文复制引用
王晓丽,王倩,徐航,何克燕,王佳豪,宋美琪,金玲,魏小星..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):949-959,11.基金项目
青海省基础研究计划(2023-ZJ-942J) （2023-ZJ-942J）
青海省高端创新人才计划(2024-LJ87)资助 （2024-LJ87）
