Heavy Metals in Main Crops and Soil in East Hainan: Enrichment Characteristics and Correlation Analysis

doi:10.11924/j.issn.1000-6850.casb2022-0139

Abstract

Abstract:

By outdoor sample collection and indoor analysis, the heavy metal contents of main crops and soil in east Hainan were analyzed. The results showed that soil As was unstable with the variable coefficient of 1.58, and the contents of Zn and Pb were more uniform in the study area. The soil heavy metals were positively correlated, which might have homology. The variable coefficient of heavy metals was less than 0.50 in rice and pepper, and the content of heavy metals was uniform. The variable coefficient of As (1.2) was unstable in Areca catechu, with nonuniform content, while the contents of Zn and Pb were uniform. There were positive and negative correlations among the heavy metals in rice, pepper and Areca catechu, but the number of positive correlations was more than that of negative correlations in pepper and Areca catechu. There was obvious synergistic absorption among the heavy metals. Heavy metals in agricultural products mainly came from soil absorption, however, the content of heavy metals in fresh Areca catechu was higher than that in soil. The enrichment ability of rice and pepper to Zn, Cr, As, Pb, Cu and Cd was weak, but that of Areca catechu was relatively strong.

Key words: characteristics, heavy metal, crop, soil, correlation, Hainan Island

WANG Peng, WANG Junguang, CHEN Yang, XU Guoqiang, ZHANG Gucheng, ZENG Guanghua, ZHANG Dongqiang. Heavy Metals in Main Crops and Soil in East Hainan: Enrichment Characteristics and Correlation Analysis[J]. Chinese Agricultural Science Bulletin, 2023, 39(5): 75-80.

Figures/Tables 10

References 22

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重金属	土壤样品	农作物样品
Cu	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Zn	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Pb	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Cd	电感耦合等离子体质谱法	电感耦合等离子体质谱法
As	氢化物发生—非色散原子荧光光谱法	氢化物发生—非色散原子荧光光谱法
Cr	电感耦合等离子体原子发射光谱法	电感耦合等离子体质谱法

重金属	土壤样品	农作物样品
Cu	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Zn	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Pb	电感耦合等离子体质谱法	电感耦合等离子体质谱法
Cd	电感耦合等离子体质谱法	电感耦合等离子体质谱法
As	氢化物发生—非色散原子荧光光谱法	氢化物发生—非色散原子荧光光谱法
Cr	电感耦合等离子体原子发射光谱法	电感耦合等离子体质谱法

项目	Cr	Cd	Cu	Zn	Pb	As
范围/(mg/kg)	10.94~92.9	0.02~0.19	5.54~35.01	20.37~94.80	7.80~35.40	1.52~152.30
平均值/(mg/kg)	31.84	0.06	12.11	50.44	20.08	20.18
土壤背景值/(mg/kg)	27.65	0.06	8.01	47.64	25.96	1.97
标准/(mg/kg)	150	0.3	50	200	70	40
标准差(s)	18.67	0.03	7.76	19.54	6.84	31.88
变异系数	0.59	0.50	0.64	0.39	0.34	1.58

项目	Cr	Cd	Cu	Zn	Pb	As
范围/(mg/kg)	10.94~92.9	0.02~0.19	5.54~35.01	20.37~94.80	7.80~35.40	1.52~152.30
平均值/(mg/kg)	31.84	0.06	12.11	50.44	20.08	20.18
土壤背景值/(mg/kg)	27.65	0.06	8.01	47.64	25.96	1.97
标准/(mg/kg)	150	0.3	50	200	70	40
标准差(s)	18.67	0.03	7.76	19.54	6.84	31.88
变异系数	0.59	0.50	0.64	0.39	0.34	1.58

元素	Cr	Cd	Cu	Zn	Pb	As
Cr	1
Cd	0.016	1
Cu	0.596^**	0.041	1
Zn	0.455^**	0.427^**	0.270	1
Pb	0.361^*	0.378^*	0.299	0.856^**	1
As	0.789^**	0.204	0.582^**	0.323^*	0.220	1