广西科学院学报2025，Vol.41Issue(3)：314-322,9.DOI:10.13657/j.cnki.gxkxyxb.20251017.008
濒危植物合柱金莲木种苗质量分级及其光合特性比较
Classification of Seedlings and Comparative Study of Photosyn-thetic Characteristics in the Endangered Plant Sauvagesia rh-odoleuca
摘要
Abstract
In order to provide a reference for the introduction,cultivation and breeding of high-quality seedlings of endangered plant Sauvagesia rhodoleuca,one-year-old cutting seedlings of S.rhodoleuca was selected as the research object,the quality grading standards of S.rhodoleuca seedlings were discussed by principal com-ponent analysis and K-means clustering analysis,photosynthetic characteristics of S.rhodoleuca were meas-ured by Li-6800 portable photosynthesis analyzer,and the photosynthetic characteristics of different grades of seedlings were compared.The results showed that:(1)Seedling quality grading criteria were as follows.The plant height of the first-grade seedlings was≥34.00 cm,the crown width was≥363.67 mm,the stem diame-ter at ground level was≥4.11 cm.The plant height of the second-grade seedlings was 27.11-＜34.00 cm;the crown width was 175.78-＜363.67 mm;the stem diameter at ground level was 3.59-＜4.11 cm.(2)The diurnal variation of net photosynthetic rate(Pn)of S.rhodoleuca showed that the peak values of net photosynthetic rate under different light conditions were different.(3)In the parameters of photosynthesis-light response curve,there was no significant difference in dark respiration rate(Rd),maximum net photo-synthetic rate(P max),Light Compensation Point(LCP)and Apparent Quantum Yield(AQY)among the first-grade seedlings,the second-grade seedlings and the third-grade seedlings(P＞0.05),and the Light Satu-ration Point(LSP)of the first-grade seedlings and the third-grade seedlings showed significant difference(P＜0.05).The results of this study provide a scientific basis for the introduction and cultivation of S.rh-odoleuca and the breeding of high-quality seedlings,and reveal the variation of photosynthesis.关键词
濒危植物/合柱金莲木/种苗/质量分级/光合特性Key words
endangered plants/Sauvagesia rhodoleuca/seedling/quality classification/photosynthetic charac-teristics分类
林学引用本文复制引用
闫俊彤,何国华,李茜,邹蓉,唐健民,丁涛,韦霄..濒危植物合柱金莲木种苗质量分级及其光合特性比较[J].广西科学院学报,2025,41(3):314-322,9.基金项目
广西林业科技推广示范项目(桂林科字[2022]第23号),"桂科学者"创新团队启动项目(CQZ-C-1902),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. （桂林科字[2022]第23号）
