中国农学通报2025，Vol.41Issue(24)：37-44,8.
郁闭度对桉树林下间作大高良姜光合作用及产量的影响
Effects of Canopy Density on Photosynthesis and Yield of Intercropping Alpinia galanga Under Eucalyptus Plantations
摘要
Abstract
To investigate the effects of different canopy densities of Eucalyptus on the photosynthetic characteristics and yield of Alpinia galanga,four different canopy densities(high canopy density>0.7,medium canopy density 0.4-0.7,low canopy density 0.2-0.4,and no shading)of Eucalyptus were used as experimental subjects for understory intercropping.The photosynthetic characteristics,yield,and quality of A.galanga were evaluated.The results showed that the photosynthetic efficiency(Pn),stomatal conductance(Gs)and transpiration rate(Tr)of A.galanga were the highest and the photosynthetic efficiency was the best under no shading treatment,and the yield of rhizome was significantly higher than that of other treatments,showing no shading>low canopy density>medium canopy density>high canopy density.However,under the high canopy density treatment,the net photosynthetic rate of A.galanga decreased,the yield was the lowest,and the flavonoid content in the rhizome of A.galanga significantly increased,reaching the highest level and improving its quality.Pn was significantly positively correlated with the yield,and negatively correlated with the flavonoid content.Stomatal conductance was positively correlated with the yield.This study indicates that enhancing Pn and Gs is crucial for increasing the yield in A.galanga,low canopy closure is more conducive to yield increasing,while high canopy density is beneficial for improving quality.关键词
林下种植/桉树/郁闭度/大高良姜/光合特性/产量和品质Key words
under-forest planting/Eucalyptus/canopy density/Alpinia galanga/photosynthetic characteristics/yield and quality分类
农业科技引用本文复制引用
高凯,曾广宇,雷明旭,石文文,田燕燕,何龙飞..郁闭度对桉树林下间作大高良姜光合作用及产量的影响[J].中国农学通报,2025,41(24):37-44,8.基金项目
财政部和农业农村部"国家现代产业技术体系"(CARS-21) （CARS-21）
广西林业科技推广示范项目"广西林下药用姜科植物优良品种选育及种植模式构建研究"(2023GXLK10). （2023GXLK10）
