贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2014年
6期
24-27
,共4页
溶解性有机质(DOM)%无机汞%水稻幼苗%生物可利用性
溶解性有機質(DOM)%無機汞%水稻幼苗%生物可利用性
용해성유궤질(DOM)%무궤홍%수도유묘%생물가이용성
dissolved organic matter%inorganic mercury%rice seedling%bioavailability
为研究水稻根际典型溶解性有机质（DOM）对无机汞生物可利用性的影响，选取草酸、柠檬酸、黄腐酸与无机汞络合，利用水稻幼苗进行无机汞的吸收累积试验，测定水稻幼苗根部及叶片中无机汞的含量，分析水稻植株内无机汞的转运系数。结果表明：草酸、黄腐酸处理组中水稻根部无机汞含量与对照（超纯水体系）相比分别降低65．1％、64．4％；草酸、黄腐酸促进叶片累积无机汞，柠檬酸则无明显作用；草酸、黄腐酸处理组中水稻无机汞的转运系数分别为0．34和0．31，明显高于对照（0．10）。结论：草酸、黄腐酸不仅抑制水稻根部无机汞的累积，还可提高无机汞在水稻植株体内的运输，进而增加水稻叶片中无机汞的含量。
為研究水稻根際典型溶解性有機質（DOM）對無機汞生物可利用性的影響，選取草痠、檸檬痠、黃腐痠與無機汞絡閤，利用水稻幼苗進行無機汞的吸收纍積試驗，測定水稻幼苗根部及葉片中無機汞的含量，分析水稻植株內無機汞的轉運繫數。結果錶明：草痠、黃腐痠處理組中水稻根部無機汞含量與對照（超純水體繫）相比分彆降低65．1％、64．4％；草痠、黃腐痠促進葉片纍積無機汞，檸檬痠則無明顯作用；草痠、黃腐痠處理組中水稻無機汞的轉運繫數分彆為0．34和0．31，明顯高于對照（0．10）。結論：草痠、黃腐痠不僅抑製水稻根部無機汞的纍積，還可提高無機汞在水稻植株體內的運輸，進而增加水稻葉片中無機汞的含量。
위연구수도근제전형용해성유궤질（DOM）대무궤홍생물가이용성적영향，선취초산、저몽산、황부산여무궤홍락합，이용수도유묘진행무궤홍적흡수루적시험，측정수도유묘근부급협편중무궤홍적함량，분석수도식주내무궤홍적전운계수。결과표명：초산、황부산처리조중수도근부무궤홍함량여대조（초순수체계）상비분별강저65．1％、64．4％；초산、황부산촉진협편루적무궤홍，저몽산칙무명현작용；초산、황부산처리조중수도무궤홍적전운계수분별위0．34화0．31，명현고우대조（0．10）。결론：초산、황부산불부억제수도근부무궤홍적루적，환가제고무궤홍재수도식주체내적운수，진이증가수도협편중무궤홍적함량。
To investigate the effects of typical dissolved organic matter (DOM)on the bioavailability of inorganic mercury (IHg),IHg was complexed with representative DOM in rice rhisphere soil solutions, such as oxalic acid,citric acid and fulvic acid in order to study the effects of DOM on the uptake of IHg by rice plant,and IHg content in roots and leaves of rice seedlings was detected and the transfer coefficient of IHg in rice plant was analyzed.Results:Compared with the control composed of ultrapure water,the concentration of IHg in roots significantly decreased by 65.1% and 64.4% in oxalic acid and fulvic acid respectively.Oxalic acid and fulvic acid promoted IHg accumulation in leaves,while citric acid had no significant promotion effect;Transmission coefficients of IHg in oxalic acid and fulvic acid treatments were 0.34 and 0.31 respectively,significantly higher than the control(0.10).Conclusion:Oxalic acid and fulvic acid could not only inhibit the accumulation of IHg in rice roots,but also improve the transportation of IHg in rice plant,which may increase IHg content in leaves.
