北方农业学报2023，Vol.51Issue(5)：31-39,9.DOI:10.12190/j.issn.2096-1197.2023.05.03
AM真菌与氮交互作用对高粱根系侵染率及光合特性的影响
Effects of AM fungi and nitrogen interaction on root infection rate and photosynthetic characteristics of sorghum
摘要
Abstract
[Objective]Study the effects of AM fungi and nitrogen addition on the root infection rate and photosynthetic characteristics of sorghum,to screen for the optimal amount of biological and nitrogen fertilizer.[Methods]Using pot experiment,6 treatments were set up including 0,150,and 300 kg/hm2 three nitrogen levels(N0,N1 and N2)and two AM fungal treatments(inoculation GM and non-inculation NGM).Sorghum root infection status and photosynthetic indexes at filling stage were investigated.[Results]AM fungi and nitrogen treatments had significant interactions(P<0.05)on sorghum root infection rate,leaf stomatal conductance,and leaf transpiration rate.Compared with the non-inoculation treatment,the sorghum leaf chlorophyll contents of inoculated N0,N1,and N2 levels increased by 10.80%,8.29%,and 8.78%(P<0.05),respectively,and the net assimilation rate increased by 8.86%,9.47%,and 4.03%(P<0.05),respectively.The sorghum leaf transpiration rates of N0 and N1 levels increased by 24.85%and 16.14%,respectively(P<0.05).Under the inoculation treatment,compared with N0 level,the sorghum root infection rates under N1 and N2 levels decreased by 35.38%and 30.77%,respectively(P<0.05),and the leaf stomatal conductance decreased by 15.96%and 19.54%,respectively(P<0.05).Correlation analysis showed that AM fungi addition resulted in significant positive correlation of sorghum root infection rate with leaf chlorophyll content,stomatal conductance,net assimilation rate,and transpiration rate(P<0.05).[Conclusion]AM fungi inoculation and 150 kg/hm2 of nitrogen fertilizer addition were the best treatments to reduce root infection rate and improve the photosynthetic characteristics of sorghum.关键词
AM真菌/氮/交互作用/高粱/根系侵染率/光合特性Key words
AM fungi/Nitrogen/Interaction/Sorghum/Root infection rate/Photosynthetic characteristics分类
农业科技引用本文复制引用
马英慧,马英智,马英杰..AM真菌与氮交互作用对高粱根系侵染率及光合特性的影响[J].北方农业学报,2023,51(5):31-39,9.基金项目
现代农业产业技术体系建设专项基金项目(JN2014012) （JN2014012）
