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Metal(loid) pollution in vegetable field soils has become increasingly severe and affects the safety of vegetable crops. Research in China has mainly focused on greenhouse vegetables (GV), while open field vegetables (OV) and the spatial distribution patterns of metal(loid)s in the surrounding soils have rarely been assessed. In the present study, spatial analysis methods combining Geographic Information Systems (GIS) and Moran’s I were applied to analyze the effects of vegetable fields on metal(loid) accumulation in soils. Overall, vegetable fields affected the spatial distribution of metal(loid)s in soils. In long-term vegetable production, the use of large amounts of organic fertilizer led to the bioconcentration of cadmium (Cd) and mercury (Hg), and long-term fertilization resulted in a significant pH decrease and consequent transformation and migration of chromium (Cr), lead (Pb), and arsenic (As). Thus, OV fields with a long history of planting had lower average pH and Cd, and higher average As, Cr, Hg, and Pb than GV fields, reached 0.93%, 10.1%, 5.8%, 3.0%, 80.8%, and 0.43% respectively. Due to the migration and transformation of metal(loid)s in OV soils, these should be further investigated regarding their abilities to reduce the accumulation of metal(loid)s in soils and protect the quality of the cultivated land.
Qiang Wang; Shanlian Yang; Menglei Zheng; Fengxiang Han; Youhua Ma. Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I. International Journal of Environmental Research and Public Health 2019, 16, 4095 .
AMA StyleQiang Wang, Shanlian Yang, Menglei Zheng, Fengxiang Han, Youhua Ma. Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I. International Journal of Environmental Research and Public Health. 2019; 16 (21):4095.
Chicago/Turabian StyleQiang Wang; Shanlian Yang; Menglei Zheng; Fengxiang Han; Youhua Ma. 2019. "Effects of Vegetable Fields on the Spatial Distribution Patterns of Metal(loid)s in Soils Based on GIS and Moran’s I." International Journal of Environmental Research and Public Health 16, no. 21: 4095.
Selection of rice varieties and application of amendments are effective measures to ensure food safety. Here we report that in the non-Cd area, the grain quality of all rice varieties met the Chinese National Grain Safety Standards (CNGSS). In the high-Cd area, rice varieties showed significant different bioaccumulation of Cd with lower rice yields than those in non-Cd area with the average decrease of 31.1%. There was a negative correlation between grain Cd content and yields. A total of 19 rice varieties were selected as low Cd accumulating rice varieties and their Cd content met CNGSS in the low-Cd area. Six of them met CNGSS in the high-Cd area. The application of amendments significantly reduced Cd content in rice grains by 1.0-84.7% with an average of 52.6% and 13 of varieties met CNGSS. The amendments reduced available Cd content in soils by 1.1-75.8% but had no significant effects on rice yields. Therefore, the current study implied that proper agronomic management with selection of rice varieties and soil amendments was essential in controlling Cd accumulation in rice grains.
Liangmei Chen; Wenge Wu; Fengxiang Han; Jiangxia Li; Wenling Ye; Huanhuan Fu; Yonghua Yan; Youhua Ma; Qiang Wang. Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice. International Journal of Environmental Research and Public Health 2019, 16, 2376 .
AMA StyleLiangmei Chen, Wenge Wu, Fengxiang Han, Jiangxia Li, Wenling Ye, Huanhuan Fu, Yonghua Yan, Youhua Ma, Qiang Wang. Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice. International Journal of Environmental Research and Public Health. 2019; 16 (13):2376.
Chicago/Turabian StyleLiangmei Chen; Wenge Wu; Fengxiang Han; Jiangxia Li; Wenling Ye; Huanhuan Fu; Yonghua Yan; Youhua Ma; Qiang Wang. 2019. "Agronomic Management and Rice Varieties Controlling Cd Bioaccumulation in Rice." International Journal of Environmental Research and Public Health 16, no. 13: 2376.