Geng Anjing, Wang Xu, Wu Lishu, Wang Fuhua, Chen Yan, Yang Hui, Zhang Zhan, Zhao Xiaoli
Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, Guangdong, People's Republic of China; Research Center of Trace Elements of Huazhong Agricultural University, Wuhan 430070, Hubei, People's Republic of China.
Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, Guangdong, People's Republic of China.
Ecotoxicol Environ Saf. 2017 Mar;137:172-178. doi: 10.1016/j.ecoenv.2016.11.030. Epub 2016 Dec 19.
P-arsanilic acid (AsA) is a emerging but less concerned contaminant used in animal feeding operations, for it can be degraded to more toxic metabolites after being excreted by animals. Rice is the staple food in many parts of the world, and also more efficient in accumulating arsenic (As) compared to other cereals. However, the uptake and transformation of AsA by rice is unclear. This study aimed to evaluate the potential risk of using AsA as a feed additive and using the AsA contaminated animal manure as a fertilizer. Five rice cultivars were grown in soil containing 100mg AsA/kg soil, after harvest, As species and their concentrations in different tissues were determined. Total As concentration of the hybrid rice cultivar was more than conventional rice cultivars for whole rice plant. For rice organs, the highest As concentration was found in roots. AsA could be absorbed by rice, partly degraded and converted to arsenite, monomethylarsonic acid, dimethylarsinic acid, arsenate. The number of As species and their concentrations in each cultivar were related to their genotypes. The soil containing 100mg AsA/kg or more is unsuitable for growing rice. The use of AsA and the disposal of animal manure requires detailed attention.
对氨基苯胂酸（AsA）是一种新兴但较少受到关注的污染物，用于动物饲养作业，因为它在被动物排泄后可降解为毒性更强的代谢产物。水稻是世界许多地区的主食，与其他谷物相比，其在积累砷（As）方面也更有效。然而，水稻对AsA的吸收和转化尚不清楚。本研究旨在评估使用AsA作为饲料添加剂以及使用受AsA污染的动物粪便作为肥料的潜在风险。在含有100mg AsA/kg土壤的土壤中种植了五个水稻品种，收获后，测定了不同组织中As的种类及其浓度。杂交水稻品种全株的总As浓度高于常规水稻品种。对于水稻器官，根部的As浓度最高。AsA可被水稻吸收，部分降解并转化为亚砷酸盐、一甲基胂酸、二甲基胂酸、砷酸盐。每个品种中As的种类数量及其浓度与它们的基因型有关。含有100mg AsA/kg或更高浓度的土壤不适宜种植水稻。使用AsA和处理动物粪便需要给予详细关注。
