Effect of Amendments on High Concentration Lead-contaminated Soil in Guangxi

doi:10.11924/j.issn.1000-6850.casb2023-0892

Abstract

Abstract:

In order to reduce the harm of high lead-contaminated soil to crops, three additives of superphosphate, organic fertilizer and phosphorus rock powder were used to explore the remediation effect on high lead- contaminated soil in Guangxi through pot experiments. The results showed that compared with the control group T₀, the application of superphosphate, organic fertilizer and phosphorus rock powder significantly reduced the harm of lead poisoning (P < 0.05) to different degrees, reduced soil pH and soil DTPA-Pb, water soluble Pb content, improved the survival rate and biological yield of pakchoi, and reduced the enrichment coefficient of lead in pakchoi. The above amendments can be used as the preferred improvement materials for high lead-contaminated soil in Guangxi.

Key words: amendment, lead, soil, organic matter, biological availability, lead contamination, soil remediation, calcium superphosphate, rock phosphate, Chinese cabbage, soil amendment

ZENG Weiquan, GUO Dajie, YUAN Hui. Effect of Amendments on High Concentration Lead-contaminated Soil in Guangxi[J]. Chinese Agricultural Science Bulletin, 2024, 40(27): 69-74.

Figures/Tables 6

References 40

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测定项目	pH	<0.002 mm粒径/(mg/kg)	Pb/(mg/kg)	DTPA-Pb/(mg/kg)	有机质/(mg/kg)	速效磷/(mg/kg)	碱解氮/(mg/kg)
桂林污染土壤	6.78	159±0.6	3114±21	568.68±48.40	24.32±1.70	59.55±8	167.5±14
国家三级土壤质量标准	6.50	—	500	—	—	—	—

测定项目	pH	<0.002 mm粒径/(mg/kg)	Pb/(mg/kg)	DTPA-Pb/(mg/kg)	有机质/(mg/kg)	速效磷/(mg/kg)	碱解氮/(mg/kg)
桂林污染土壤	6.78	159±0.6	3114±21	568.68±48.40	24.32±1.70	59.55±8	167.5±14
国家三级土壤质量标准	6.50	—	500	—	—	—	—

供试材料	含铅量/(mg/kg)	含氮量/%	含磷量/%	含有机质量/%
尿素	—	99	—	—
磷酸二氢钾	—	—	48	1.60
过磷酸钙	—	—	16	—
有机肥	—	—	12	43
磷矿粉	—	—	32	—

供试材料	含铅量/(mg/kg)	含氮量/%	含磷量/%	含有机质量/%
尿素	—	99	—	—
磷酸二氢钾	—	—	48	1.60
过磷酸钙	—	—	16	—
有机肥	—	—	12	43
磷矿粉	—	—	32	—

处理方式	过磷酸钙	纯有机肥	磷矿粉
T₀	0	0	0
T₁	0.45	0	0
T₂	0.45	2	0
T₃	0.45	0	0.3
T₄	0.45	2	0.3