西北植物学报2024，Vol.44Issue(7)：1129-1140,12.DOI:10.7606/j.issn.1000-4025.20230670
干旱胁迫对云南松幼苗C、N、P化学计量特征的影响
The effects of drought stress on the stoichiometric characteristics of C,N,and P in Pinus yunnanensis seedlings
摘要
Abstract
[Objective]This study aims to investigate the effects of drought stress on the distribution of car-bon(C),nitrogen(N),and phosphorus(P)elements and stoichiometry in organs of Pinus yunnanensis seedlings,and to provide a theoretical basis for water management in the cultivation of P.yunnanensis.[Methods]The contents of C,N,and P in organs of 1-year-old P.yunnanensis seedlings under drought stress were determined by potted water control method and four drought treatments.[Results](1)Com-pared with the appropriate water treatment,the C content in leaves,stems,and fine roots of P.yun-nanensis seedlings was decreased under drought stress,but was increased in coarse roots.N content was decreased in coarse roots and increased in fine roots.P content was increased in leaves and decreased in stems.(2)The variation coefficient of element content was P＞N＞C.The contents of C and N showed the greatest variability in fine roots.The variability of P content was the highest in leaves and the lowest in coarse roots.(3)There was a significant negative correlation between N content and coarse roots,a signif-icant positive correlation between stems and fine roots,and a significant positive correlation between N and P contents in stems and coarse roots.[Conclusion]Under drought stress,growth of P.yunnanensis seed-lings is restricted by N elements,and the utilization efficiency of N and P is increased.The overall varia-bility of C,N,and P content in coarse and fine roots is higher than leaves and stems.The root system is more sensitive to changes in soil water status.关键词
云南松/干旱胁迫/利用效率/变异性/相关性Key words
Pinus yunnanensis/drought stress/utilization efficiency/variability/correlation分类
农业科技引用本文复制引用
文程敬,吴俊文,景会庆,陈刚,李志琪,段贵河..干旱胁迫对云南松幼苗C、N、P化学计量特征的影响[J].西北植物学报,2024,44(7):1129-1140,12.基金项目
国家自然科学基金项目(31960306) （31960306）
西南林业大学校级科研专项(110222013) （110222013）
