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| Effects of biochar-based fertilizers on the migration and accumulation of Cd in rice under incorporation of Astragalus sinicus |
| Received:July 06, 2020 |
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| KeyWord:rice;Astragalus sinicus;biochar-based fertilizers;Cd pollution |
| Author Name | Affiliation | E-mail | | YU Cheng-long | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China | | | TANG Jian | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China | | | ZHENG Qin | Bureau of Agriculture and Rural Affairs of the Wannian County, Wannian 336100, China | | | NI Guo-rong | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China | | | XIE Zhi-jian | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China | | | RONG Qin-lei | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China | | | GUO Nai-jia | Jiangxi Agricultural Ecology and Resource Protection Station, Nanchang 330046, China | | | WANG Hui-ming | Jiangxi Agricultural Ecology and Resource Protection Station, Nanchang 330046, China | 923234200@qq.com | | ZHOU Chun-huo | School of Land Resources and Environment, Jiangxi Agricultural University/Innovative Integration Center of Industry and Education in Resource Utilization of Agricultural Waste, Prevention and Control of Non-point Pollution of Jiangxi Province, Nanchang 330045, China
Key Laboratory of Nutrient Management of Farmland and Prevention of Agricultural NPS Pollution, Nanchang 330045, China | zchh3366@163.com |
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| Abstract: |
| This study aimed to investigate the effects of different dosages of biochar-based fertilizers on the growth and development of early season rice and the migration and accumulation of Cd in various rice organs under the incorporation of Astragalus sinicus. Five treatments were set up through pot experiments:control[A. sinicus in lieu of 30% nitrogen fertilizer + 70% nitrogen (FNG30)], 30% A. sinicus + 10% biochar-based fertilizers + 60% nitrogen (FNG30B10), 30% A. sinicus + 20% biochar-based fertilizers + 50% nitrogen (FNG30B20), 30% A. sinicus + 30% biochar-based fertilizers + 40% nitrogen (FNG30B30), and 30% A. sinicus + 40% biochar-based fertilizers + 30% nitrogen (FNG30B40). The results showed that compared with the control group, different dosages of biochar-based fertilizers could increase yield in rice grains. The yield in rice grains improved with the increase in the dosage of biochar-based fertilizers. The application of biochar-based fertilizers could reduce the Cd content in brown rice, compared to that in the control group; the decrease with each treatment application of biochar-based fertilizers was:FNG30B30 (29.2%) > FNG30B20 (20.8%) > FNG30B40 (19.6%) > FNG30B10 (8.3%). Biochar-based fertilizers could inhibit the transport of Cd from rice root to above ground parts, and the inhibition effect was most evident when the dosage of biochar fertilizers was 30%. At this point, the ability to transport Cd from rice husk to brown rice was also the lowest. To summarize, with the incorporation of A. sinicus, the application of biochar-based fertilizers can effectively reduce the risk of Cd pollution in the rice field. In addition, when the dosage of biochar-based fertilizers is 30%, the treatment effect on Cd pollution in the rice field is the best. |
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