亚热带农业研究2025，Vol.21Issue(3)：189-197,9.DOI:10.13321/j.cnki.subtrop.agric.res.2025.03.006
低磷处理对杉木幼苗物候和生长节律的影响
Effects of low phosphorus treatments on the phenology and growth rhythm of Chinese fir seedlings
摘要
Abstract
[Purpose]This study explored the effects of low phosphorus treatments on the phenology and growth rhythm of Chinese fir seedlings to reveal the adaptive response mechanisms of Chinese fir under low phosphorus stress,thus providing a theoretical ba-sis for the cultivation of Chinese fir plantations.[Method]A sand culture controlled experiment was conducted with one-year-old Chinese fir seedlings.Two treatments—normal phosphorus supply(0.5 mmol·L-1 KH2PO4)and low phosphorus stress(0.25 mmol·L-1 KH2PO4)—were designed.Phenological cameras were used to continuously observe phenological indicators such as leaf bud expansion,leaf unfolding,and new shoot growth of Chinese fir seedlings.The seedling height,ground diameter,biomass,and root growth indicators were measured.[Result]Low phosphorus stress significantly delayed and shortened the phenological phases(except the dormant period)of Chinese fir.It postponed leaf bud expansion,leaf unfolding,and new shoot growth by 7 days,6 days,and 1 day and shortened the corresponding duration by 1 day,5 days,and 7 days,respectively.Furthermore,the stress ad-vanced the dormancy stage by 6 days and prolonged the stage by 13 days.The growth of seedling height and ground diameter was in-hibited under low phosphorus stress,with lower monthly average growth than that under normal phosphorus supply.The aboveground biomass and total biomass decreased under low phosphorus stress.However,the root volume,root surface area,root branch number,and belowground biomass significantly increased under low phosphorus stress,and the late stage of root growth was extended by a-bout one month.[Conclusion]Low phosphorus stress affects the phenology and growth rhythm of Chinese fir seedlings by delaying phenological phases,inhibiting aboveground growth,and promoting root development.This induces Chinese fir to adapt to phosphor-us-deficient environments by adjusting biomass allocation strategies.关键词
低磷胁迫/杉木/物候/生长节律Key words
low phosphorus stress/Chinese fir/phenology/growth rhythm分类
林学引用本文复制引用
刘忠跃,张利荣,陈璟骅,袁涛,陈水兰,刘爱琴..低磷处理对杉木幼苗物候和生长节律的影响[J].亚热带农业研究,2025,21(3):189-197,9.基金项目
"十四五"国家重点研发计划项目"杉木大径级无节良材培育技术"(2021YFD2201302) （2021YFD2201302）
杉木种业工程项目"福建省杉木高世代良种创新与产业化开发(2021-2025)"(ZYCX-LY-202101). （2021-2025）
