解磷菌联合绿色活化剂对黑麦草累积土壤中镉的影响  

Effect of Phosphate-Solubilizing Bacteria Combined with Green Activator on Accumulation/Translocation of Cadmium in Soil by Ryegrass

作　　者：彭鑫 朱逸纯 杨远[1] 王密 赵儒乐 黄红丽 PENG Xin;ZHU Yichun;YANG Yuan;WANG Mi;ZHAO Rule;HUANG Hongli(College of Environment and Ecology,Hunan Agricultural University,Changsha 410128,Hunan,China;Chinalco Environmental Protection and Ecological Technology(Hunan)Co Ltd,Changsha 410021,Hunan,China)

机构地区：[1]湖南农业大学环境与生态学院,湖南长沙410128 [2]中铝环保生态技术(湖南)有限公司,湖南长沙410021

出　　处：《矿冶工程》2024年第1期95-99,104,共6页Mining and Metallurgical Engineering

基　　金：国家自然科学基金青年基金(42107308);湖南省高新技术产业科技创新引领计划(2020NK2001)。

摘　　要：以橙子废渣提取物和谷氨酸二乙酸四钠(GLDA)为原材料制备了绿色活化剂,研究了解磷菌联合绿色活化剂对黑麦草富集、转运及累积土壤中镉的影响。结果表明,解磷菌对黑麦草在镉污染环境下的生长有显著促进作用,单独使用绿色活化剂时黑麦草干重下降了27.37%,抑制了黑麦草的生长;将二者联用时,黑麦草干重是空白组的1.29倍,解磷菌的加入缓解了绿色活化剂对黑麦草生长的负面作用。解磷菌联合绿色活化剂使土壤中有效态镉含量提升而土壤总镉浓度减少,且地上部分和地下部分的富集系数分别提升了35.37%和10.23%,黑麦草对镉的转运系数提升了22.58%。此外,镉在黑麦草地上部分和地下部分的累积总量分别提升了87.90%和32.69%,且各处理方式下,镉在地上部分累积总量均大于地下部分,说明解磷菌联合绿色活化剂的使用促进了黑麦草对土壤中镉的提取。With orange residue extract and tetrasodium glutamate diacetate(GLDA)as raw materials,a green activator was prepared.Then,the effects of phosphate-solubilizing bacteria(PSB)combined with green activator on the enrichment,translocation and accumulation of cadmium from soil by ryegrass were studied.The results show that PSB can significantly promote the growth of ryegrass in cadmium-contaminated soil.However,the growth of ryegrass is inhibited by only using green activator,with the dry weight of ryegrass at the end of experiment decreased by 27.37%;while a combination of PSB and green activator can make the final dry weight of ryegrass become 1.29 times that in the blank group,indicating that the addition of PSB can alleviate the negative effect of green activator on the growth of ryegrass.A combination of both can increase the content of phytoavailable cadmium in soil,while decrease the total cadmium concentration in soil.It is shown that the enrichment coefficient of Cd in stem and root parts of ryegrass increases by 35.37%and 10.23%,respectively,and the translocation factor of cadmium by ryegrass increases by 22.58%.In addition,the total accumulation of cadmium in the stem and root parts of ryegrass is up by 87.90%and 32.69%,respectively.It is found that the total accumulation of cadmium in the stem is all greater than that in the root whether by using PSB and green activator separately,or by a combination of both,indicating that PSB combined with green activator can promote the phytoextraction efficiency of cadmium from soil by ryegrass.

关 键 词：重金属污染土壤 土壤生物修复 镉 植物提取 解磷菌 活化剂 黑麦草 

分 类 号：X53[环境科学与工程—环境工程]