|
| Effects of lime and oyster powder on increasing the yield of and reducing cadmium content in Pueraria thomsonii in acid cadmium–contaminated farmlands |
| Received:December 03, 2022 |
| View Full Text View/Add Comment Download reader |
| KeyWord:cadmium polluted soil;lime;oyster powder;Pueraria thomsonii;biomass;food safety |
| Author Name | Affiliation | E-mail | | LIN Xiaobing | College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil and Germplasm Resources, Jinxian 331717, China | | | ZHANG Qiumei | Agricultural Science Research Center of Xinyu City, Jiangxi Province, Xinyu 338000, China | | | WU Duoji | College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China | | | ZHOU Lijun | National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil and Germplasm Resources, Jinxian 331717, China | | | WU Lin | National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil and Germplasm Resources, Jinxian 331717, China | | | HE Shaolang | National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil and Germplasm Resources, Jinxian 331717, China | | | HUANG Qianru | National Engineering and Technology Research Center for Red Soil Improvement, Jiangxi Institute of Red Soil and Germplasm Resources, Jinxian 331717, China | | | WU Jianfu | College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China | wjf6711@126.com |
|
| Hits: 744 |
| Download times: 596 |
| Abstract: |
| This study aimed to determine the effects of calcium-containing substances on the growth and cadmium enrichment characteristics of Pueraria thomsonii in acid cadmium–contaminated farmlands. The acid cadmium–contaminated soil in Xinyu, Jiangxi Province, was utilized for field experiments. The effects of lime and oyster powder on soil physicochemical properties and P. thomsonii cadmium content and biomass were studied. The results showed that, compared with the control, calcium application significantly increased soil pH（0.85–0.87 units）and reduced the available cadmium content（53.85%）. Treatment with calcium also effectively reduced cadmium accumulation in P. thomsonii. Compared with the control, lime treatment increased the biomass and yield of and income from P. thomsonii by 34.26%, 38.20%, and 107.15%, respectively; however, it decreased the cadmium content in tubers and arrowroot by 34.09% and 15.38%, respectively. Compared with the control, oyster powder treatment could increase the biomass and yield of and income from P. thomsonii by 42.46%, 38.07%, and 173.08%, respectively; the cadmium content in tubers and arrowroot decreased by 63.64% and 69.23%, respectively. Oyster powder treatment exerted the best effect on increasing the yield of and reducing cadmium content in P. thomsonii. The correlation showed that the biomass and yield of P. thomsonii were positively correlated with soil pH（P<0.05）but negatively correlated with soil cadmium content（P<0.05）. The cadmium content in P. thomsonii tissues was significantly negatively correlated with soil pH（P< 0.05）but positively correlated with soil cadmium content（P<0.05）. Under cadmium pollution, the application of oyster powder（2 250 kg· hm-2）to P. thomsonii was beneficial in promoting its growth, improving its yield and quality, and generating considerable revenue. Additionally, oyster powder application successfully reduced cadmium enrichment and accomplished the safe planting of P. thomsonii. |
|
|
|
