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| Effects of quicklime and calcium magnesium phosphate application on late-season rice growth and grain cadmium uptake |
| Received:April 17, 2019 |
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| KeyWord:quicklime;calcium magnesium phosphate fertilizer;rice;cadmium |
| Author Name | Affiliation | E-mail | | WEN Jiong | Scientific Observation and Experiment Station of Yueyang, Ministry of Agriculture/Yueyang Agricultural Research Academy, Yueyang 414000, China | | | LI Zu-sheng | Scientific Observation and Experiment Station of Yueyang, Ministry of Agriculture/Yueyang Agricultural Research Academy, Yueyang 414000, China | | | XU Wang-long | Scientific Observation and Experiment Station of Yueyang, Ministry of Agriculture/Yueyang Agricultural Research Academy, Yueyang 414000, China | | | CHEN Ge | Scientific Observation and Experiment Station of Yueyang, Ministry of Agriculture/Yueyang Agricultural Research Academy, Yueyang 414000, China | | | BAI Ling-yu | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | ZENG Xi-bai | Scientific Observation and Experiment Station of Yueyang, Ministry of Agriculture/Yueyang Agricultural Research Academy, Yueyang 414000, China
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | zengxibai@caas.cn | | WU Jia-mei | Hunan Institute of Agro-Environment and Ecology, Changsha 410000, China | |
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| Abstract: |
| The aim of the present study is to evaluate the remediation effect of different fertilization measures on cadmium(Cd) -contaminated paddy fields. The effects of quicklime, calcium magnesium phosphate fertilizer, or their combined application with chemical and organic fertilizers on soil Cd availability, rice growth, and grain Cd content were determined in a field plot experiment. The addition of quicklime and calcium magnesium phosphate fertilizer significantly increased the soil pH by 10.5%~16.1%. In comparison, the combined application of quicklime, calcium magnesium phosphate fertilizer, and chemical fertilizer(NPKML) resulted in a maximum increase of 16.1% in soil pH, followed by quicklime and calcium magnesium phosphate fertilizer. The combined application of organic fertilizer and quicklime along with NPKML significantly decreased the contents of soil available Cd by 7.9%~23.5% and the grain Cd content by 35.1%~47.5%. NPKML showed optimal efficiency in decreasing the soil available Cd and grain Cd content. No significant effect on rice growth and quality was observed after application with quicklime and calcium magnesium phosphate fertilizer. In conclusion, the combined application of organic fertilizer, chemical fertilizer, calcium magnesium phosphate fertilizer, and quicklime is a better immobilizer of Cd in paddy soils. |
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