摘要
采用盆栽实验探究菌粉和草木灰添加对Cu^2+胁迫土样上牧草幼苗发芽率、株高、地上部和根系生物量等特征的影响,并分析各生长指标间的相关性。结果显示:当Cu^2+超过200 mg/L时,菌粉和草木灰的添加促进苏丹草的发芽而对黑麦草发芽影响不大,两种牧草的幼苗株高均随生长时间的增加而增加,增长速度整体表现为生长初期(前5天)大于后期(后5天)。菌粉添加不利于苏丹草和黑麦草的生物量的增加,而菌粉+草木灰添加可促进两种牧草生物量的增加。两种牧草的各生理指标之间均保持中度以上正相关关系,添加菌粉和草木灰有利于牧草幼苗在Cu^2+污染土样上生长。
The effects of fungus powder and plant ash on the germination rate,plant height,above-ground and root biomass of pasture seedling under Cu^2+ stress were studied by pot experiment,and the correlations between each growth index were analyzed.The results showed that when the concentration of Cu^2+ exceeded 200 mg/L,fungus powder and plant ash had significant effects on the germination of Sudangrass,but little effect on Ryegrass.The plant height of Sudangrass and Ryegrass seedling was increased with the growth time,and the growth rate at the early growth stage(the previous 5 d)was greater than that at the late stage(the last 5 d).Fungus powder did not make the biomass of Sudangrass or Ryegrass increase,while Fungus powder plus plant ash did.The physiological indexes of the two pastures maintained a moderate or above positive correlation.The addition of fungus powder and plant ash in Cu^2+ contaminated soil was beneficial to the growth of pasture seedlings.
作者
李文斌
邱润
朱浪
何海霞
谢佳
邓红艳
康乐
孟昭福
LI Wen-bin;QIU Run;ZHU Lang;HE Hai-xia;XIE Jia;DENG Hong-yan;KANG Le;MENG Zhao-fu(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China;Institute of Environmental Science,China West Normal University,Nanchong,Sichuan 637009,China;Key Laboratory of Plant Nutrition and Agri-Environment in Northwest China,Ministry of Agriculture,Xianyang,Shaanxi 712100,China)
出处
《环境监测管理与技术》
CSCD
2019年第5期65-68,共4页
The Administration and Technique of Environmental Monitoring
基金
国家自然科学基金资助项目(41271244)
四川省教育厅基金资助项目(18ZB0576)
四川省科技厅基金资助项目(2018JY0224)
关键词
Cu^2+污染
牧草
菌粉
草木灰
土壤修复
Cu^2+ pollution
Pasture
Fungus powder
Plant ash
Soil remediation
