西南林业大学学报2025，Vol.45Issue(3)：42-49,8.DOI:10.11929/j.swfu.202402028
光氮互作对赤苍藤幼苗光合生理的影响
The Effect of Light and Nitrogen Interaction on the Physiological Characteristics of Erythropalum scandens
摘要
Abstract
Two-year-old Erythropalum scandens cutting seedlings were used as materials,with 4 light levels and 5 nitrogen levels being set.The photosynthetic and physiological characteristics of E.scandens seedlings un-der different light and nitrogen treatments were compared to analyze the optimal light and nitrogen conditions for photosynthesis and physiology of E.scandens seedlings.The results showed that there were significant differ-ences in various physiological indicators among different light and nitrogen treatments,with light and nitrogen having significant main effects,and their interaction significantly affecting various physiological indicators.At the same nitrogen level,SS and SP content were highest under L0 and L1,decreasing gradually with decreasing light intensity,while MDA content was highest under L0,with shading significantly reducing MDA content.POD was highest under L2 treatment,and SOD activity showed a change of initially decreasing and then increasing,being higher under L0 and L3.Under the same light conditions,nitrogen at level N2 significantly increased SS and SP content,MDA content under nitrogen application was higher than that without nitrogen application,and nitrogen application affected POD and SOD activity to varying degrees.At the same nitrogen level,with increasing shad-ing,Pn and Tr initially increased and then decreased,reaching peak values at L1,Chl a+b content showed a trend of initial increase and then decrease,while carotenoid content initially decreased and then increased,Fv/Fm and Fv/F0 gradually increased.Under the same light conditions,high nitrogen(N4)and no nitrogen application(N0)were both unfavorable for increasing Pn,Tr,Chl a+b content,Fv/Fm,and Fv/F0 of E.scandens leaves.Subordinate function analysis results showed that physiological condition of L0N2 exhibited the highest quality,followed by L1N2.In general,insufficient light,nitrogen deficiency or excessive nitrogen application had detrimental effects on the photosynthetic capacity and physiological status of E.scandens seedlings.Adequate light and appropriate nitrogen fertilizer management were more favorable for enhancing the photosynthetic capacity and physiological status of E.scandens seedlings.关键词
赤苍藤/光照/氮素/生理/光合特性Key words
Erythropalum scandens/light/nitrogen/physiology/photosynthetic characteristics分类
农业科技引用本文复制引用
蒙玥盈,潘虹,梁精才,罗家儒,马道承,王凌晖..光氮互作对赤苍藤幼苗光合生理的影响[J].西南林业大学学报,2025,45(3):42-49,8.基金项目
广西林业科技项目(桂林科研[2021]16号)资助 （桂林科研[2021]16号）
崇左市江州区那达林场澳洲坚果等树种繁育技术研究项目资助 （）
南宁树木园林下木本蔬菜种植技术研究与示范项目(南宁树木园科字2018-1号)资助. （南宁树木园科字2018-1号）
