西北林学院学报2025，Vol.40Issue(4)：65-75,11.DOI:10.3969/j.issn.1001-7461.2025.04.08
生物炭配施氮素对Cd胁迫'泡桐1201'种子萌发的影响
Effects of Biochar Combined with Nitrogen Application on 'Paulownia 1201' Seed Germination under Cd Stress
摘要
Abstract
The study aims to investigate the physiological mechanism of biochar with nitrogen application on mitigating the germination of 'Paulownia 1201' seeds under Cd stress,and to provide a reference for the application of biochar and nitrogen for remediation of the Cd-contaminated soil.Taking the seeds of 'Pau-lownia 1201' as the test material,we investigated the effects of different concentrations of the Paulownia biochar treatment solution with nitrogen on the germination characteristics,antioxidant levels,osmotic substances,and nutrient levels of seeds under Cd stress.1)Biochar,nitrogen,and their combinations signif-icantly enhanced the germination potential,germination rate,germination index,and vigor index of the seeds.As the concentration of the treatment solution increased,the length of young shoots,root length,fresh weight,and free amino acid content were increased,reaching their maximum values at 5 g/L biochar,while the starch content showed a decreasing trend.2)When biochar or nitrogen was applied alone,the contents of GR activity,Pro,and MDA were decreased,while H2O2 did not change significantly.The lowest contents of Pro and H2O2 were observed at 5 g/L.SS and SP were increased with the increase in treatment concentrations.Additionally,the activity of APX was initially increased and then decreased with the germi-nation time.3)When biochar and nitrogen were applied together,the activities of APX and GR enzymes reached their maximum values.MDA and H2O2 were decreased,while Pro was increased slightly.The over-all improvement effect was:Biochar with nitrogen＞biochar＞nitrogen.The application of biochar and ni-trogen can enhance the antioxidant and osmoregulation ability of Paulownia seeds,promote the accumula-tion of nutrients,and significantly promote seed germination.In particular,biochar combined with nitrogen is the best treatment.关键词
Cd胁迫/生物炭/氮素/种子萌发/生理生化/'泡桐1201'Key words
Cd stress/biochar/nitrogen/seed germination/physiology and chemistry/'Paulownia 1201'分类
农业科技引用本文复制引用
朱秀红,纪爽,杨会焕,茹广欣..生物炭配施氮素对Cd胁迫'泡桐1201'种子萌发的影响[J].西北林学院学报,2025,40(4):65-75,11.基金项目
河南省级财政林业科技推广项目(30802824). （30802824）
