Arsenic and Cadmium Accumulation in Soil as Affected by Continuous Organic Fertilizer Application: Implications for Clean Production
文献类型： 外文期刊
作者： Sun, Na 1 ; Thompson, Rodney B. 2 ; Xu, Junxiang 1 ; Liao, Shangqiang 1 ; Suo, Linna 1 ; Peng, Yutao 3 ; Chen, Qing 3 ; Yang, Jungang 1 ; Li, Yanmei 1 ; Zou, Guoyuan 1 ; Sun, Yanxin 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resources & Environm, Beijing 100097, Peoples R China
2.Univ Almeria, Dept Agron, La Canada De San Urbano 04120, Spain
3.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China
关键词： trace element contamination; soil organic carbon; soil nutrients; pak choi
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2021 年 11 卷 11 期
页码：
收录情况： SCI
摘要： As and Cd in soil can be assimilated and accumulated by vegetables and can be subsequently ingested by humans. Contradictory effects of organic fertilizer application on As and Cd accumulation in soil have been reported in previous studies. An eight-year greenhouse study was conducted on a sandy loam soil in Beijing, China to investigate the effects of organic fertilizer application rate on soil properties, and As and Cd accumulation in soil. The contamination risk of pak choi grown after eight years' application of organic fertilizer was also evaluated. Soil organic carbon increased 3.0-3.8 times with low, medium and high rates of fertilizer application in 2018 compared to the initial soil. Organic fertilizer application significantly increased soil nutrients and microbial biomass while it mildly affected soil pH. The bioavailability of As/Cd has decreased after eight years' application of organic fertilizer. Pak choi crop harvested from all three treatments in 2018 did not pose a threat to human health, even for life-time consumption. Soil total As content significantly decreased with organic fertilizer application, mainly due to the lower As content in the applied fertilizer than that in soil. Continuous application of clean organic fertilizer can be adopted to reduce the contamination risk of highly contaminated soil in the soil-plant system.
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