Study on the remediation effect of soil conditioner and organic fertilizer on Cd-contaminated farmland

doi:10.14088/j.cnki.issn0439-8114.2022.20.005

Abstract

Abstract: Soil conditioner and organic fertilizer were used to carry out field experiment in the Cd-polluted area of Ziqiu town, Changyang City. The effects of soil conditioner and organic fertilizer on soil physical and chemical properties, total Cd, available Cd and Cd content of maize were analyzed. The results showed that both soil conditioner and organic fertilizer could increase soil pH value, and T3, T8 and T9 could adjust soil pH value better, and there was a significant difference compared with the control group. The contents of organic matter, available phosphorus, available potassium and slow-acting potassium were significantly increased in the treatment of T4 to T9 compared with the control group. Soil conditioner and organic fertilizer affected the activity of Cd by adjusting the physical and chemical properties of soil, promoted the transformation of effective Cd to the stable state, and thus reduced the absorption and accumulation of Cd by maize. Correlation analysis showed that Cd content of maize was negatively correlated with soil pH and positively correlated with soil available Cd. Considering the reduction rate of Cd in soil and maize,T9 treatment was the best for the passivation of Cd, and the inactivation efficiency of Cd was 21.57% and the content of Cd was 0.039 mg/kg, which was 49.35% lower than that in the control group.

Key words: soil, conditioner, organic fertilizer, effective state, maize, Cd

CLC Number:

LI Xiang-yang, GU Zhu-yu, ZHANG Xi-qiang, ZHANG Jian-yun, LI Gang, HUANG Xue-shun, XU Wei. Study on the remediation effect of soil conditioner and organic fertilizer on Cd-contaminated farmland[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(20): 22-27.

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