Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.)

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.)
	Pan, Yunyu 1,2; Koopmans, Gerwin F.2; Bonten, Luc T. C.3; Song, Jing 1; Luo, Yongming4 ; Temminghoff, Erwin J. M.2; Comans, Rob N. J.2
刊名	ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
	2016-12-01
卷号	38 期号:6 页码:1355-1372
关键词	Paddy soils Trace metal contamination Water management Redox potential Bioavailability Uptake
ISSN号	0269-4042
英文摘要	Alternating flooding and drainage conditions have a strong influence on redox chemistry and the solubility of trace metals in paddy soils. However, current knowledge of how the effects of water management on trace metal solubility are linked to trace metal uptake by rice plants over time is still limited. Here, a field-contaminated paddy soil was subjected to two flooding and drainage cycles in a pot experiment with two rice plant cultivars, exhibiting either high or low Cd accumulation characteristics. Flooding led to a strong vertical gradient in the redox potential (Eh). The pH and Mn, Fe, and dissolved organic carbon concentrations increased with decreasing Eh and vice versa. During flooding, trace metal solubility decreased markedly, probably due to sulfide mineral precipitation. Despite its low solubility, the Cd content in rice grains exceeded the food quality standards for both cultivars. Trace metal contents in different rice plant tissues (roots, stem, and leaves) increased at a constant rate during the first flooding and drainage cycle but decreased after reaching a maximum during the second cycle. As such, the high temporal variability in trace metal solubility was not reflected in trace metal uptake by rice plants over time. This might be due to the presence of aerobic conditions and a consequent higher trace metal solubility near the root surface, even during flooding. Trace metal solubility in the rhizosphere should be considered when linking water management to trace metal uptake by rice over time.
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology ; Public, Environmental & Occupational Health ; Water Resources
关键词[WOS]	DISSOLVED ORGANIC-MATTER ; CONTAMINATED SOILS ; HEAVY-METALS ; CADMIUM ; CD ; ACCUMULATION ; EXTRACTION ; PLANTS ; COPPER ; DYNAMICS
收录类别	SCI
语种	英语
WOS记录号	WOS:000387478100011
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/18734]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Wageningen Univ, Dept Soil Qual, POB 47, NL-6700 AA Wageningen, Netherlands 3.Alterra, POB 47, NL-6700 AA Wageningen, Netherlands 4.Chinese Acad Sci, Yantai Inst Costal Zone Res, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Pan, Yunyu,Koopmans, Gerwin F.,Bonten, Luc T. C.,et al. Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.)[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2016,38(6):1355-1372.
APA	Pan, Yunyu.,Koopmans, Gerwin F..,Bonten, Luc T. C..,Song, Jing.,Luo, Yongming.,...&Comans, Rob N. J..(2016).Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.).ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,38(6),1355-1372.
MLA	Pan, Yunyu,et al."Temporal variability in trace metal solubility in a paddy soil not reflected in uptake by rice (Oryza sativa L.)".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 38.6(2016):1355-1372.