广西科学院学报2025，Vol.41Issue(4)：386-393,8.DOI:10.13657/j.cnki.gxkxyxb.20251009.001
濒危植物长叶竹柏种苗质量分级标准及光合特性研究
Study on Seedling Quality Grading Standards and Photosynthetic Characteristics of the Endangered Plant,Nageia fleuryi
摘要
Abstract
To explore the grading standards and photosynthetic physiological characteristics of endangered plant Nageia fleuryi seedlings can provide valuable reference for its introduction,cultivation,and propagation of high-quality seedlings.In this study,one-year-old seedlings of the endangered species N.fleuryi was used as the research object.The principal component analysis and K-means cluster analysis were used to identify the seedling quality grading standards,and the photosynthetic characteristics were measured by Li-6800XT portable photosynthesis system.The results showed that the seedlings of N.fleuryi were divided into two grades,and their quality grading standards were as follows:the plant height,ground diameter,crown width and leaf number of grade Ⅰ seedlings was＞17.00 cm,＞4.01 cm,＞16.33 mm and＞21.00,respectively.The plant height,ground diameter,crown width and leaf number of grade Ⅱ seedlings was 11.00-17.00 cm,3.44-4.01 cm,8.04-16.33 mm and 7.00-21.00,respectively.Because the indexes of grade Ⅲ seed-lings did not reach the minimum standard of grade Ⅱ seedlings,they were not in the quality grading stand-ard.The results of photosynthetic-light response curve showed that there were significant differences in dark respiration rate(Rd),maximum photosynthetic rate(Pmax)and Apparent Quantum Yield(AQY)between grade Ⅰ seedlings and grade Ⅲ seedlings(P＜0.05).The Light Saturation Point(LSP)of grade Ⅰ,Ⅱ andⅢ seedlings were significant differences(P＜0.05),while the Light Compensation Point(LCP)was not sig-nificant differences(P＞0.05).The results of this study can provide a scientific basis for the introduction,cultivation and high-quality seedling propagation of the endangered plant N.fleuryi.关键词
长叶竹柏/质量分级/聚类分析/光合特性/光合-光响应曲线Key words
Nageia fleuryi/quality grading/cluster analysis/photosynthetic characteristics/photosynthetic light response curve分类
农业科技引用本文复制引用
王锋,马焕基,文恩德,吴林芳,韦霄,吴莹莹..濒危植物长叶竹柏种苗质量分级标准及光合特性研究[J].广西科学院学报,2025,41(4):386-393,8.基金项目
国家重点研发计划项目(2022YFF1300703),广西自然科学基金项目(2024GXNSFAA010452),中国科学院"西部之光"计划(2022),广西林业科技推广示范项目(2024GLKX10,2023LYKJ03,[2022]GT23),广西植物功能物质与资源持续利用重点实验室自主项目(ZRJJ2024-3,ZRJJ2024-4,ZRJJ2024-11),河池市科技计划项目(河科AC231113),桂林市科学研究与技术开发项目(20220134-3,20230102-3)资助. （2022YFF1300703）
