| 尹德良，何天容，陈 筠，等.不同改良剂对汞矿区水稻汞污染的钝化效果初探…[J].广东农业科学,2015,42(8):124-129 |
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不同改良剂对汞矿区水稻汞污染的钝化效果初探… |
| Preliminary study on passivation effects of mercury in riceby different amendments in mercury-mining areas |
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| DOI： |
| 中文关键词: 原位盆栽 汞矿区 改良剂 大米总汞 钝化 |
| 英文关键词: situ pot mercury-mining area amendments total mercury in rice passivation |
| 基金项目: |
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| 中文摘要: |
| 采用原位盆栽的方法，初步探究了施用不同改良剂对汞矿区水稻总汞含量的钝化效果，结果表明
汞矿区土壤总汞含量超出GB…15618-2008的限量值 50 倍以上，大米总汞含量也超出GB…2762-2005的限量值
10 倍多；改良剂在一定程度上能抑制水稻对汞的富集，在梅子溪（MZX）和敖寨（AZ），大米总汞降低率分别为
10.86%~40.95%和13.54%~35.80%，降低量分别为23.00~90.50…ng/g和34.54~68.78…ng/g；农家肥处理组在两地获得
了最高的平均降低率和降低量分别为30.55%和70.94…ng/g，其次为粉煤灰、约30.18%和70.59…ng/g，海泡石对大米
汞的钝化效果最低、约为11.98%和28.77…ng/g；灌溉方式和施肥种类等农艺措施的改变会对水稻的富集能力产生重
要影响，改良剂配施产生了积极作用，凹凸棒土+钙镁磷肥配施对水稻总汞的降低量较单施分别提高了约12.31…ng/g
和19.67…ng/g；粘土矿物的不同所产生的钝化效果存在一定差异，表现为麦饭石粉>凹凸棒土>活性白土>海泡石。 |
| 英文摘要: |
| Situ pot method was used to study the passivation effects of different amendments on total mercuryin rice in mercury-mining areas. The results showed that the total mercury in soil and rice exceeded aboutmore than 50 times（the limited value in GB 15618-2008）and 10 times（the limited value in GB 2762-2005），respectively. Amendments could generally inhibit the accumulation of total mercury in rice from soil in Meizixi（MZX）and Aozhai（AZ），and the reducing rates reached 10.86%-40.95% and 13.54%-35.8% with a reductionof 23.0 ng/g-90.5 ng/g and 34.54 ng/g-68.78 ng/g. The farmyard manure treatment had the highest averagereductive rate and amounts with 30.55% and 70.94 ng/g in the two places，and followed by fly ash with 30.18%and 70.59 ng/g. The passivation effect of Epiolite was the lowest among all amendments，the reduction rate andamount were 11.98% and 28.77 ng/g. The variance of agronomic measures including irrigation and fertilizationhad important impact on the accumulation ability of rice to mercury. Compared with the single application，the combination of Attapulgite clay and Calciumm a g n esi u m p h o s p h a t e（f e r t i l i z e r）r es p e c t i v e l yimprove the reduction amounts about 12.31 ng/g and19.67 ng/g. Therefore，the combination of dif ferentamendments owned a certain prospect. The variousc l a y m in e r a ls p r o d u ce d d i f f e r e n t e f f e c t s w i t hMedical stone powder>Attapulgite clay>Activatedclay>Sepiolite. |
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