草业学报2018，Vol.27Issue(5)：120-129,10.DOI:10.11686/cyxb2017447
施用生物炭和AM真菌对镉胁迫下玉米生长和生理生化指标的影响
Effects of biochar amendment and arbuscular mycorrhizal inoculation on maize growth and physiological biochemistry under cadmium stress
摘要
Abstract
To explore the synergistic effects of biochar and arbuscular mycorrhizal fungi (AM) on plant grown in cadmium (Cd) contaminated soil,we conducted a pot experiment to investigate the effect of wheat-straw biochar amendment and AM inoculation (Glomus intraradices BEG 141) on maize (Zea mays) growth and physiological biochemistry characteristics with soil contaminated with 0,3 or 6 mg Cd · kg-1 soil.The results showed that applying either biochar or AM inoculant alone or in combination all significantly increased maize growth,photosynthetic pigment content,photosynthesis and antioxidant enzymatic activities while decreasing intercellular CO2 concentration (Ci) and MDA content.Compared with biochar application and AM inoculation,AM inoculation alone was effective at alleviating Cd stress and facilitating maize growth while biochar alone was more effective at inducing soil alkalinization.Amending soil with biochar and AM inoculant together produced the largest increase in maize growth and physiological biochemistry characteristics.This effect was additive,with 43.87％ and 79.10％ greater plant height and biomass,33.09％,45.04％ and 31.27％ higher net photosynthetic rate (Pn),transpiration rate (Tr) and stomatal conductance (Gs),and 51.42％,82.91％ and 43.96％ higher superoxide dismutase (SOD),peroxidase (POD) and catalase (CAT) activity,respectively,at a 6 mg · kg-1 Cd contamination rate.In general,biochar and AM inoculation alone or in combination all improved maize growth and alleviated Cd toxicity.Biochar addition in combination with AM inoculation application was the most effective treatment but AM inoculation alone was more effective than biochar for increasing the resistance of Cd toxicity and improving maize growth in Cd-contaminated soil.关键词
玉米/生物炭/丛枝菌根真菌/镉胁迫/生理生化特性Key words
maize/biochar/arbuscular mycorrhizal fungi/cadmium stress/physiological biochemistry characteristics引用本文复制引用
李继伟,悦飞雪,王艳芳,张亚梅,倪瑞景,王发园,付国占,刘领..施用生物炭和AM真菌对镉胁迫下玉米生长和生理生化指标的影响[J].草业学报,2018,27(5):120-129,10.基金项目
国家自然基金项目(31700367),河南省高等学校青年骨干教师培养计划项目(2016GGJS-062),河南科技大学学科提升振兴A计划项目(13660002)和河南科技大学大学生研究训练计划项目(2017291)资助. （31700367）
