The Increase in the Arsenic Concentration in Brown Rice Due to High Temperature during the Ripening Period and Its Reduction by Silicate Material Treatment
The Increase in the Arsenic Concentration in Brown Rice Due to High Temperature during the Ripening Period and Its Reduction by Silicate Material Treatment
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DOI：
10.3390/agriculture10070289
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
Protima Dhar;Kazuhiro Kobayashi;K. Ujiie;Fumihiko Adachi;J. Kasuga;I. Akahane;T. Arao;S. Matsumoto
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文献类型：
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作者：
Protima Dhar;Kazuhiro Kobayashi;K. Ujiie;Fumihiko Adachi;J. Kasuga;I. Akahane;T. Arao;S. Matsumoto
我们使用温度梯度室 (TGC) 研究了成熟期间温度对水稻产量和糙米中砷 (As) 浓度的影响。将瓦格纳盆（1/5000a）中生长的水稻从抽穗后一周到收获期间放置在三个TGC中（每个TGC设置为四个温度水平：常温、中高温、中高温和超高温）。在 TGC 中，观察到平均气温范围比环境温度高 2°C。糙米产量与气温和土壤温度呈显着负相关，气温和土壤温度升高导致糙米产量下降。通过使用硅酸钙，产量的降低得到显着缓解。糙米中砷的含量与空气和土壤温度呈显着正相关，且随着空气和土壤温度的升高，砷的含量增加。当施用硅酸钙时，糙米中砷的浓度在所有温度范围内均显着降低，即使在高温下，其施用也能有效降低砷浓度。这些结果表明，即使在高温条件下，硅酸盐材料的应用也可能有助于缓解糙米产量的下降和砷浓度的增加。
We investigated the effect of temperature during the ripening period on the rice yield and arsenic (As) concentration in brown rice, using temperature gradient chambers (TGCs). Rice grown in Wagner pots (1/5000a) was placed in three TGCs (each TGC was set at four temperature levels: ambient, mildly-high temperature, moderately-high temperature, and super-high temperature) from one week after heading until harvest. In the TGCs, a range of mean air temperatures was observed in the range of 2 °C above the ambient temperature. There was a significant negative correlation between the brown rice yield and the air and soil temperatures, and the increase in air and soil temperatures resulted in a decrease in the yield. The reduction in yield was significantly mitigated by the application of calcium silicate. The concentration of As in the brown rice was significantly positively correlated with the air and soil temperature, and the concentration of As increased with increasing air and soil temperatures. When calcium silicate was applied, the concentration of As in brown rice was significantly lower at all temperature ranges, and its application was effective in reducing the arsenic concentration even at high temperatures. These results suggest that the application of silicate material may help mitigate the decrease in yield and the increasing As concentration in brown rice even under high-temperature conditions.