中南林业科技大学学报2025，Vol.45Issue(3)：89-97,9.DOI:10.14067/j.cnki.1673-923x.2025.03.010
不同郁闭度对野外回归海南假韶子生长与光合生理的影响
Effect of different canopy densities on growth and photosynthetic physiology of reintroduced Paranephelium hainanensis
摘要
Abstract
[Objective]The purpose of this study is to scientifically assess the habitat adaptability of the critically endangered plant Paranephelium hainanensis in its return to the wild.[Method]Using 3-year-old container seedlings of P.hainanensis,a field return experiment was conducted to explore the growth,leaf morphology,chlorophyll content and chlorophyll fluorescence parameters of P.hainanensis under three different light conditions(from low to high canopy density)such as forest edge,gap and under the forest canopy.[Result]Continuous monitoring for two years showed that as canopy density increased,the survival rate of P.hainanensis decreased from 93.57%to 62.96%;the net growth of plant height decreased from 26.72 to 4.84 cm;the net growth of ground diameter decreased from 2.78 to 0.79 mm;and the net growth of crown width decreased from 0.82 to 0.42 m.The specific leaf area increased with the increase in canopy density.The single leaf area,the contents of chlorophyll a,chlorophyll b and total chlorophyll decreased,while the ratio of chlorophyll a/b first increases and then decreased.The chlorophyll fluorescence parameters Fo,Fm and Fv increased significantly,but the ratios of Fv/Fm and Fv/Fo decreased.[Conclusion]Changes in canopy density have significant effects on the survival rate,growth,and photosynthetic physiology of P.hainanensis.Based on the comprehensive analysis,it is concluded that the forest edge is suitable as a habitat for the wild return of P.hainanensis.This provides significant guidance for exploring suitable habitats for the reintroduction of other wild plants with extremely small populations.关键词
海南假韶子/野外回归/郁闭度/形态指标/叶绿素荧光参数Key words
Paranephelium hainanensis/reintroduction in the wild/canopy density/morphological indicators/chlorophyll fluorescence parameters分类
农业科技引用本文复制引用
洪文君,王炳宇,曾德华,孙令俊,黄永平,韦茂山,刘俊..不同郁闭度对野外回归海南假韶子生长与光合生理的影响[J].中南林业科技大学学报,2025,45(3):89-97,9.基金项目
海南省自然科学基金高层次人才项目(421RC672) （421RC672）
海南省自然科学基金面上项目(321MS0820). （321MS0820）
