| 王丙烁,黄亦玟,李娟,龙健,黄益宗,韩廿.不同改良剂和水分管理对水稻吸收积累砷的影响[J].农业环境科学学报,2019,38(8):1835-1843. |
| 不同改良剂和水分管理对水稻吸收积累砷的影响 |
| Effect of different amendments and water management on arsenic uptake and accumulation by rice in arsenic contaminated soil |
| 投稿时间：2019-05-27 |
| DOI：10.11654/jaes.2019-0585 |
| 中文关键词: 砷污染土壤 水分管理 改良剂 水稻 |
| 英文关键词: arsenic contaminated soil water management amendments rice |
| 基金项目:国家重点研发计划项目（2017YFD0801500）；国家科技支撑计划项目（2015BAD05B02） |
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| 中文摘要: |
| 为筛选出有效治理As污染农田土壤的修复模式，采用盆栽试验的方法，比较了不同混合改良剂和水分管理对As污染土壤中水稻吸收积累As的影响。结果表明，土壤以及水稻籽粒、茎叶和根系中的As含量在不淹水条件下较低，在淹水条件下较高，在孕穗期至灌浆期淹水条件下处于前两者之间。不同水分管理方式下，添加Si+Mo使籽粒As含量降低4.8%~19.9%，茎叶As含量降低16.9%~56.3%；添加Fe+Ca使籽粒As含量降低26.6%~50.6%，茎叶As含量降低40.3%~81.2%。添加改良剂还能降低水稻根系向茎叶和籽粒转运As的能力。综合而言，不淹水+Fe+Ca处理降低水稻As含量的效果最明显。 |
| 英文摘要: |
| To screen the effective remediation model of As-contaminated farmland, the effect of different mixed amendments and water management on the uptake and accumulation of As in As-contaminated soil were compared using a pot experiment. The results showed the concentrations of As in soil and rice grains, shoots, and roots were lower under the non-flooded conditions, while the higher As concentrations were seen under the flooded conditions. Under different water management methods, compared with the control treatment, with the addition of Si + Mo the concentration of As in grains decreased by 4.8%~19.9% and in shoots by 16.9%~56.3%. With the addition of Fe + Ca, the concentration of As in grains decreased by 26.6%~50.6% and in shoots by 40.3%~81.2%. The addition of amendments could also reduce the ability of As transport from rice roots to shoots and grains. To sum up, the effect of non-flooded + Fe + Ca on reducing As concentration in rice was the most noticeable. |
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