施氮下接种丛枝菌根真菌对太行山南麓典型灌木荆条生长性状的影响
The Effects of Nitrogen Application and Arbuscular Mycorrhizal Fungi Inoculation on the Growth Character of the Typical Shrub Species Vitex negundo in Southern Taihang Mountains
王珺瑶 1李艳艳 1郑祥源 1张志铭 1钱建强 1赵勇1
作者信息
- 1. 河南农业大学林学院,郑州 450002
- 折叠
摘要
为明确施氮与接种丛枝菌根真菌(AMF)对植物生长的联合效应,选取太行山区典型灌木物种荆条为研究对象,探究施氮、接种丛枝菌根真菌及二者交互作用对荆条各项生长指标的影响.结果显示,施氮处理对荆条株高无显著影响,接种菌根真菌以及与施氮联合处理使株高显著增加25％和28％,不同处理对基径均无显著影响;施氮和接种菌根真菌显著促进地上与地下生物量积累,其中二者联合处理效果更好,且植株根冠比显著低于其他处理;三种处理均显著增加荆条叶片净光合速率、荧光参数、植株总根长、根表面积和根体积,联合处理对荆条叶面积和叶绿素含量影响最为显著;接种AMF处理和联合处理导致根直径显著降低.研究表明,施氮和接种丛枝菌根真菌对荆条地上部分生长及根系形态和生物量均有一定促进作用,菌根共生能够明显改善施氮条件下荆条生长状况,影响根系构型,提高光合作用,有助于荆条有效应对太行山区逆境条件,推动区域植被恢复与重建.
Abstract
This study aims to dissect the synergistic effects of nitrogen application and inocula-tion with arbuscular mycorrhizal fungi(AMF)on the growth parameters of Vitex negundo,a repre-sentative shrub species in the Taihang Mountains region.We methodically analyzed the individual and combined impacts of nitrogen supplementation and AMF inoculation on various aspects of plant growth.Results showed that:1)Nitrogen application alone did not significantly alter the height,while AMF inoculation and the combined treatment significantly increased the plant height by 25％and 28％respectively;2)The application of nitrogen and inoculation with AMF significantly pro-moted the above and below-ground biomass accumulation.Furthermore,this treatment notably resulted in a lower root-to-shoot ratio compared to the other treatments.3)All these three treat-ments significantly increased the net photosynthetic rate and fluorescence parameters of the leaves,and the AN treatment greatly impacted the leaf area and chlorophyllin content of V.negundo.4)All treatments significantly augmented the total root length,surface area,and root volume,while the A and AN treatments resulted in a significant reduction in root diameter.Our study indicates that nitrogen application and AMF inoculation significantly enhanced above-ground growth,alter root morphology,and increase the biomass of V.negundo.The symbiosis significantly improves the indi-vidual growth,influence root architecture,and enhance photosynthesis of V.negundo.
关键词
氮添加/菌根真菌/根系形态/生长特征/先锋灌木Key words
nitrogen addition/mycorrhiza fungi/root morphology/growth characteristics/pioneering shrub引用本文复制引用
基金项目
国家自然科学基金(42077450)
国家自然科学基金(31270750)
国家自然科学基金(31870522)
出版年
2024
NETL
NSTL
万方数据