|
| Effects of Agronomic Measures on Accumulation of Cd in Rice |
| Received:February 09, 2015 |
| View Full Text View/Add Comment Download reader |
| KeyWord:agronomic measure;cadmium pollution;rice;alluvial sandy soil;extractable Cd |
| Author Name | Affiliation | E-mail | | SHEN Xin | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | ZHU Qi-hong | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | ZHU Han-hua | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | XU Chao | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | | | HE Yan-bin | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | HUANG Dao-you | Key Laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China | dyhuang@isa.ac.cn |
|
| Hits: 3312 |
| Download times: 141 |
| Abstract: |
| Research has shown that agronomic measures could decrease soil Cd availability and thus reduce Cd uptake by plants. In this research, the effects of low Cd-accumulating rice variety(V), soil pH adjustment(P), continuous flooding(I) and their combinations on Cd phytoavailability in paddy soil were investigated on an alluvial sandy soil in a pot experiment. Different agronomic practices increased soil pH by 0.05 to 0.9, but decreased NH4OAc extractable Cd by 5.1% to 38.4%, as compared with the control(CK). The treatment with V-I-P significantly reduced the content of Cd in brown rice and rice hull by 61.5%(P< 0.01) and 70.9%(P< 0.01) over the control, respectively. Both IP and PV treatments had less effects. The yield of rice grain was increased by those agronomic measures, with the most noticeable yield increases observed in the VIP treatment 2.6 time as much as the control. Planting low Cd-accumulating rice variety(P< 0.05) and adjusting soil pH(P< 0.001) significantly lowered Cd concentrations in brown rice. In addition, a significant interaction between continuous flooding and soil pH was observed(P< 0.01). The present results suggest that combination of low Cd-accumulating rice variety, soil pH adjustment and continuous flooding could control Cd absorption by rice in contaminated paddy soils. |
|
|
|
