生物资源2026，Vol.48Issue(4)：419-424,6.DOI:10.14188/j.ajsh.20260037
林下不同年份竹溪黄连生长与叶片光合性能分析
Growth and leaf photosynthetic performance of forest-cultivated Coptis chinensis from Zhuxi across different cultivation ages
摘要
Abstract
To investigate the change patterns in growth characteristics of aboveground part,flower yield,and leaf photosynthetic performance of Coptis chinensis across different cultivation ages,using 2～7-year-old C.chinensis plants as materials,this study systematically measured plant height,branch number,and stem diameter,as well as flower yield in 4～6-year-old plants,leaf chlorophyll SPAD(soil and plant analyzer development)values in 3～6-year-old plants,and photosynthetic parameters in 3～6-year-old leaves.The results showed that,with increasing cultivation age,plant height and branch number increased significantly,stem diameter increased markedly from year 4 to year 6,but declined slightly in year 7.Flower yield in 4～6-year-old plants increased progressively with age,reaching a maximum of 261 inflorescences(0.38 kg)per square metre,and 104 249 inflorescences(153.39 kg)per mu.Chlorophyll SPAD values in 3～6-year-old leaves exhibited a unimodal trend,peaking in 4-year-old plants and decreasing significantly in 5～6-year-old plants,indicating leaf senescence in later cultivation stages.The net photosynthetic rate followed a similar pattern,peaking at 6.80 µmol•m-2•s-1 in 4-year-old plants and declining to the lowest value of 5.22 µmol•m-2•s-1 in 6-year-old plants.Transpiration rate,stomatal conductance and intercellular CO2 concentration were lowest in 3-year-old plants,increased slightly in 4～5-year-old plants,and decreased in 6-year-old plants.However,intercellular CO2 concentration remained high in 5～6-year-old plants,suggesting that the decline in photosynthesis at later stages was primarily attributable to reduced mesophyll cell activity rather than stomatal limitation.In summary,growth of aboveground part and flower yield of C.chinensis continue to improve with increasing cultivation age.Notably,4-year-old plants exhibit the strongest photosynthetic capacity and highest physiological activity,whereas 5～6-year-old plants show significant decline in photosynthetic performance and leaf senescence.These findings provide a physiological reference for age-specific cultivation management in C.chinensis production.关键词
黄连/栽培年限/光合特性/叶绿素SPAD值/叶片衰老/农艺性状Key words
Coptis chinensis/cultivation age/photosynthetic characteristics/chlorophyll SPAD value/leaf senescence/agronomic traits分类
农业科技引用本文复制引用
郭锐,李辉,李桂梅,张泽志..林下不同年份竹溪黄连生长与叶片光合性能分析[J].生物资源,2026,48(4):419-424,6.基金项目
湖北省中药材创新团队专项经费(2025-620-000-001-024) （2025-620-000-001-024）
湖北省五大提质行动"黄连"技术集成专项经费(2026WDTZZX-HL) （2026WDTZZX-HL）
国家现代农业产业技术体系建设专项(CARS-21) （CARS-21）
