title: External inorganic N source enhances the uptake of As species in garland chrysanthemum (C. coronarium) amended with chicken manure bearing roxarsone and its metabolites.
abstract: Roxarsone (ROX), a widely used feed organoarsenic additive, is excreted as itself and its metabolites in animal manure. Animal manure is commonly applied with N fertilizer to meet the N demand of crop. We investigated the accumulation of As species in garland chrysanthemum plants fertilized with chicken manure (CM) bearing ROX and its metabolites, combined with different inorganic N sources (NH₄(+), NO₃(-) and urea), respectively. The change of pH, N forms and As species in soils was examined as well. The results show that As(V), As(III) and dimethylarsinic acid (DMA) were detectable in soils, and conversions between As species were affected by three inorganic N sources, irrespective of N form and soil pH. As(III) was the sole As species in garland chrysanthemum shoots, and As(III) and As(V) could be detected in roots. Urea, superior to NH₄(+), significantly enhanced the uptake of As species in plants by promoting plant growth, while NO₃(-) slightly reduced the As accumulation due to decreased biomass. As(III) was the dominant As compound (86.9-89.7%) in plants. Therefore, inorganic N fertilizers may inadvertently increase the risk of As contamination in plant from ROX via the way ROX→chicken→CM→soil→crop.
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China. Electronic address: lyaolx@yahoo.com.cn.
authors: Lixian
authors: L
authors: Yao
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Lianxi
authors: L
authors: Huang
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Zhaohuan
authors: Z
authors: He
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Changmin
authors: C
authors: Zhou
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Guoliang
authors: G
authors: Li
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Baomei
authors: B
authors: Yang
authors: Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou 510640, PR China.
authors: Xiancai
authors: X
authors: Deng
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D002645:Chickens; D031202:Chrysanthemum / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D008372:Manure; D009584:Nitrogen / Q000008:administration & dosage; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D012406:Roxarsone / Q000008:administration & dosage*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*
chemical_list: D005308:Fertilizers; D008372:Manure; D012989:Soil Pollutants; D012406:Roxarsone; D001151:Arsenic; D009584:Nitrogen