Effects of Different Passivator Combinations on Chromium and Copper Speciation in Soil and Accumulation in Rice

WEI Xiaoliao; MOU Li; FU Tianling; LI Xiangying; HE Tengbing; HE Ji; ZENG Qingqing

doi:10.13870/j.cnki.stbcxb.2019.05.051

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Effects of Different Passivator Combinations on Chromium and Copper Speciation in Soil and Accumulation in Rice

更新时间：2025-03-12

- Effects of Different Passivator Combinations on Chromium and Copper Speciation in Soil and Accumulation in Rice
- Vol. 33, Issue 5, Pages: 349-357(2019)
- 作者机构：
  
  1. 贵州大学农学院,贵阳,550025
  2. 贵州大学生命科学学院,贵阳,550025
  3. 贵州大学新农村发展研究院,贵阳,550025
  4. 贵州省山地畜禽养殖污染控制与资源化技术工程实验室,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.05.051
  CLC：
- Published：2019
- 稿件说明：
移动端阅览
WEI Xiaoliao, MOU Li, FU Tianling, et al. Effects of Different Passivator Combinations on Chromium and Copper Speciation in Soil and Accumulation in Rice[J]. 2019, 33(5): 349-357.
DOI：

WEI Xiaoliao, MOU Li, FU Tianling, et al. Effects of Different Passivator Combinations on Chromium and Copper Speciation in Soil and Accumulation in Rice[J]. 2019, 33(5): 349-357. DOI： 10.13870/j.cnki.stbcxb.2019.05.051.

摘要

为了筛选出能有效抑制水稻各部位吸收积累Cr和Cu的有机和无机材料钝化剂组合，选取水稻土以盆栽试验研究了15种钝化剂组合对土壤Cr和Cu赋存形态及水稻各部位吸收积累Cr和Cu的影响。结果表明：15种钝化剂组合施用使土壤pH上升0.25~1.04，土壤阳离子交换量增加2.65%~50.96%，土壤有机质含量增加0.22%~17.20%，土壤可交换态Cr含量降低35.21%~55.63%；除生石灰+钝化剂4+鸡粪组合使土壤可还原态显著增加外，其他组合的土壤可还原态Cr无显著变化；土壤可氧化态和残渣态Cr均无明显变化；土壤可交换态Cu含量降低6.66%~33.42%；土壤可还原态和可氧化态Cu无明显变化；土壤残渣态Cu增加0.32%~5.04%，其中钝化剂3、生石灰+钝化剂1+鸡粪、生石灰+钝化剂4+鸡粪3个组合能显著增加土壤残渣态含量。根系对Cr和Cu的富集能力最大，15种钝化剂组合可使水稻根系、秸秆、稻壳和糙米中Cr含量分别下降4.59%~49.41%，39.84%~76.87%，7.14%~31.60%，17.32%~67.10%，水稻根系、秸秆、稻壳和糙米中Cu含量分别下降10.57%~48.41%，7.99%~52.53%，21.12%~45.11%，14.39%~66.92%。15种钝化剂组合均可降低糙米中Cr和Cu的含量，其中以生石灰+钝化剂2+鸡粪的效果最佳。

Abstract

In order to screen out the passivator combination of organic and inorganic materials

which could effectively inhibit the absorption and accumulation of chromium (Cr) and copper (Cu) in various parts of rice

a pot experiment in paddy soil was conducted to study the effects of 15 combinations of passivators on occurrence forms of Cr and Cu in soil and absorption and accumulation of Cr and Cu in rice. The results showed that combined application of 15 kinds of passivators increased the soil pH

soil cation exchange capacity (CEC) and soil organic matter by 0.25~1.04

2.65%~50.96% and 0.22%~17.20%

respectively

and reduced the exchangeable Cr content by 35.21%~55.63%. Except for the combination of quicklime (L) + passivator 4 (D4) + chicken manure (M) which could significantly increase the soil reducible Cr

other combinations had no significant effect on soil reducible Cr. After application of passivator

soil oxidizable Cr and residual Cr had no significant change

content of exchangeable Cu decreased by 6.66~33.42% in the soil. soil reduciblu Cu and Oxidizable Cu had nosigificant change. The combination of 15 kinds of passivators increased the soil residual Cu content by 0.32%~5.04%

and the combinations of D3

L+D1+M and L+D4+M could significantly increase the content of soil residual fraction. Root system showed the highest enrichment capacity for Cr and Cu. After application of passivator

the contents of Cr in rice roots

straw

rice husk and brown rice decreased by 4.59%~49.41%

39.84%~76.87%

7.14%~36.10% and 17.32~67.10%

respectively. After application of passivator

the contents of Cu in rice roots

straw

rice husk and brown rice decreased by 10.57%~48.41%

7.99%~52.53%

21.12%~45.11% and 14.39%~66.92%

respectively. The combinations of 15 kinds of passivator could reduce the content of Cr and Cu in brown rice

and the combination of L+D2+M was the best.

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