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当前位置: 首页 > 文章 > 耐性细菌与活化剂对土壤镉生物有效性的影响 河南农业科学 2018 (1) 48-53+108
Position: Home > Articles > Effects of Resistant Bacteria and Activators on Bioavailability of Cd in Contaminated Soil Journal of Henan Agricultural Sciences 2018 (1) 48-53+108

耐性细菌与活化剂对土壤镉生物有效性的影响

作  者：
梁小迪;史鼎鼎;徐少慧;黄成涛;蒋代华
单  位：
广西大学农学院
关键词：
土壤修复;耐性细菌;活化剂;黑麦草;Cd污染;生物有效性
摘  要：
为探讨耐性细菌与活化剂对镉(Cd)污染土壤Cd生物有效性的影响,采用盆栽试验方法,研究了耐性细菌与活化剂(有机肥、EDTA、黄腐酸、柠檬酸)对黑麦草吸收Cd的影响。结果表明:赤红壤和棕色石灰土中菌剂50 mL/盆(J1)、菌剂200 mL/盆(J2)、有机肥40 g/盆(Y1)、有机肥80 g/盆(Y2)、菌剂50 m L/盆+有机肥40 g/盆(JY1)、菌剂100 mL/盆+有机肥80 g/盆(JY2)、黄腐酸5 g/盆(H1)、黄腐酸50 g/盆(H2)处理的黑麦草总生物量较对照(自来水)提高了22.89%~65.93%,EDTA和柠檬酸使黑麦草总生物量降低。赤红壤中,菌剂与活化剂处理的黑麦草地上部、地下部Cd含量较对照分别提高了8.28%~66.45%、10.92%~74.17%;棕色石灰土中,菌剂与活化剂处理的黑麦草地上部、地下部Cd含量较对照分别提高10.88%~70.97%、10.10%~51.82%。赤红壤和棕色石灰土中,J1、J2、Y1、Y2、JY1、JY2、E1(EDTA 5 mmol/盆)、E2(EDTA 15mmol/盆)处理的黑麦草地上部Cd吸收量较对照提高了6.93%~126.45%。黑麦草对Cd吸收量越大,土壤中弱酸可溶态和残渣态Cd越少,可还原态、可氧化态Cd越多。综上,耐Cd菌剂与活化剂可提高Cd生物有效性、提高黑麦草对Cd污染土壤的生物修复效果,具有较好的应用推广前景。
译  名：
Effects of Resistant Bacteria and Activators on Bioavailability of Cd in Contaminated Soil
作  者：
LIANG Xiaodi;SHI Dingding;XU Shaohui;HUANG Chengtao;JIANG Daihua;Agricultural College,Guangxi University;
关键词：
Soil remediation;;Resistant bacteria;;Activator;;Ryegrass;;Cadmium pollution;;Bioavailability
摘  要：
In order to investigate the effect of resistant bacteria and activators on bioavailability of Cd in contaminated soil,the effects of resistant bacteria and several activators( such as organic fertilizer,EDTA,FA,citric acid) on the uptake of Cd by heavy metal-resistant plant ryegrass were studied in this experiment. The results indicated that the total biomasses of ryegrass of 50 mL/pot resistant bacteria( J1),200 mL/pot resistant bacteria( J2),40 g/pot organic fertilizer( Y1),80 g/pot organic fertilizer( Y2),50 mL/pot resistant bacteria + 40 g/pot organic fertilizer( JY1),100 mL/pot resistant bacteria + 80 g/pot organic fertilizer( JY2),5 g/pot FA( H1),50 g/pot FA( H2) treatments were increased by 22. 89% —65. 93% compared with that of CK( water) in lateritic red earth and brown calcareous soil. But the total biomasses of ryegrass of EDTA and citric acid treatments were decreased. In lateritic red earth,compared with CK,the content of Cd in the upper and lower parts of ryegrass treated with microbial agents and activators increased by 8. 28% —66. 45% and 10. 92% —74. 17,respectively. In brown calcareous soil,the Cd contents in the upper and lower parts of ryegrass treated with microbial agents and activators were10. 88% —70. 97% and 10. 10% —51. 82% higher than that of CK,respectively. In lateritic red earthand brown calcareous soil,the uptake of Cd by the upper parts of ryegrass in J1,J2,Y1,Y2,JY1,JY2,E1( EDTA 5 mmol/pot),E2( EDTA 15 mmol/pot) treatments increased by 6. 93% —126. 45% compared with that of the control group. The greater the uptake of Cd by ryegrass,the less the amounts of weak acid dissolvable Cd and residual Cd in soil,but the more the amounts of reducible Cd and oxidizable Cd in soil. This study showed that cadmium-resistant bacteria and activators could improve the bioavailability of cadmium and the bioremediation effect on cadmium polluted soil by ryegrass,and had a good prospect of application and promotion.

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