Effects of chicken manure application on cadmium and arsenic accumulation in rice grains under different water conditions
- 142 Downloads
Widespread contamination of agricultural soil with Cd and As has resulted in substantial transfer and accumulation of these toxicants in rice grains. In the present study, we investigated the effects of chicken manure application on Cd and As concentrations and As speciation in the rice grains grown under different water conditions by pot experiment. Under aerobic condition, the application of chicken manure increased soil pH and soil Eh during most of the growth period of rice. Consequently, the application of chicken manure has little effect on total Cd, slightly decreased total As and inorganic As of rice grains when applied at rate of 2.0%. Under intermittent irrigation condition, the application of chicken manure increased soil pH and decreased soil Eh during most of the growth period of rice. Thus, chicken manure decreased total Cd, As, and inorganic As of rice grains. Besides, there was increased reduction of Cd and As with increase in the amount of chicken manure applied. Under flooded condition, the application of chicken manure increased soil pH before heading but decreased soil pH after heading. The application of chicken manure dramatically decreased total and inorganic As in rice grains, and slightly decreased Cd of rice grains. There was increased reduction of total As concentration with the increase in the amount of chicken manure applied. Meanwhile, the inorganic As concentration was the lowest when the concentration of chicken manure was 1.0%.
KeywordsArsenic As speciation Cadmium Chicken manure Rice Water management
The current research was supported by the Funds for the Science and Technology Innovation Project from the Chinese Academy of Agricultural Sciences (No. CAASXTCX-xym-2017), the China Agriculture Research System (CARS-03), the Tianjin Science and Technology Support Plan Project (14ZCZDSF00004), The National Key Research and Development Program of China (2018YFD080066), and Tianjin Natural Science Foundation Key Project (17JCZDJC34200).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Chen D, Xu X, Luan D, Zhang Y, Shao X, Hu J (2011) Remediation of paddy soil contaminated by arsenic, cadmium and lead with amendments. Jiangsu J Agric Sci 27(6):1284–1288Google Scholar
- Inahara M, Ogawa Y, Azuma H (2007) Countermeasure by means of flooding in latter growth stage to restrain cadmium uptake by lowland rice [Oryza sativa]. Jpn J Soil Sci Plant Nutr 78(2):149–155Google Scholar
- Ito H, Limura Y (1976) The absorption and translocation of cadmium in rice plants and its influence on their growth, in comparison with zinc[J]. Bull Hokuriku Natl Agric Exp Stn 19:71–139Google Scholar
- Mondal D, Polya DA (2008) Rice is a major exposure route for arsenic in Chakdaha block, Nadia district, West Bengal, India: a probabilistic risk assessment. Appl Geochem 23(11):2986–2997Google Scholar
- Yamane T (1989) The mechanisms and countermeasures of arsenic toxicity to rice plant. Bull Shimane Agric Exp Station 24:1–95Google Scholar