植物营养与肥料学报
植物營養與肥料學報
식물영양여비료학보
PLANT NUTRITION AND FERTILIZER SCIENCE
2013年
6期
1356-1365
,共10页
刘侯俊%李雪平%韩晓日%高晓宁
劉侯俊%李雪平%韓曉日%高曉寧
류후준%리설평%한효일%고효저
铁膜%镉%水稻%微量元素%铁
鐵膜%鎘%水稻%微量元素%鐵
철막%력%수도%미량원소%철
iron plaque%cadmium%rice%micro-elements%iron
本试验利用营养液和土壤培养系统，研究不同Fe、Cd处理下根表铁膜对水稻吸收Cd、Mn、Cu、Zn的影响。土壤中Fe的水平为0、1、2 g/kg Fe（以FeSO4·7H2O的形式供应），Cd的水平为0、2、10 mg/kg Cd（以3CdSO4·8H2 O的形式供应）。营养液中Fe和Cd的水平分别为0、10、30、50、80、100 mg/L Fe和0、0.1、1.0 mg/L Cd。收获后测定水稻根表、根中和地上部Cd、 Fe、 Mn、Cu、Zn含量。试验结果表明，两种培养方式下，随着介质中Fe浓度的增加，水稻根表铁膜（ DCB-Fe）逐渐增多。土壤培养方式下，根表铁膜中Cd和Mn含量随铁膜量增加而略有增加，所有元素含量均表现为根中大于铁膜中。营养液培养条件下，根表铁膜中Mn和Cu含量在高量Fe供应时有所增加， Mn、Cu、Zn表现为铁膜中大于根中。根表铁膜中Zn含量在两种培养方式下均未呈现一定规律性变化。根中和地上部Cd、Mn、Cu、Zn含量一般都随介质中Fe浓度的增加而下降，Cu和Zn含量在加Cd处理中下降。以上结果证明，铁膜对Cd的吸附阻挡能力有限，对Mn、Cu、 Zn的吸附作用因培养方式和元素种类不同而有所差异，植株体内微量元素含量的下降主要与它们之间的相互抑制作用有关。
本試驗利用營養液和土壤培養繫統，研究不同Fe、Cd處理下根錶鐵膜對水稻吸收Cd、Mn、Cu、Zn的影響。土壤中Fe的水平為0、1、2 g/kg Fe（以FeSO4·7H2O的形式供應），Cd的水平為0、2、10 mg/kg Cd（以3CdSO4·8H2 O的形式供應）。營養液中Fe和Cd的水平分彆為0、10、30、50、80、100 mg/L Fe和0、0.1、1.0 mg/L Cd。收穫後測定水稻根錶、根中和地上部Cd、 Fe、 Mn、Cu、Zn含量。試驗結果錶明，兩種培養方式下，隨著介質中Fe濃度的增加，水稻根錶鐵膜（ DCB-Fe）逐漸增多。土壤培養方式下，根錶鐵膜中Cd和Mn含量隨鐵膜量增加而略有增加，所有元素含量均錶現為根中大于鐵膜中。營養液培養條件下，根錶鐵膜中Mn和Cu含量在高量Fe供應時有所增加， Mn、Cu、Zn錶現為鐵膜中大于根中。根錶鐵膜中Zn含量在兩種培養方式下均未呈現一定規律性變化。根中和地上部Cd、Mn、Cu、Zn含量一般都隨介質中Fe濃度的增加而下降，Cu和Zn含量在加Cd處理中下降。以上結果證明，鐵膜對Cd的吸附阻擋能力有限，對Mn、Cu、 Zn的吸附作用因培養方式和元素種類不同而有所差異，植株體內微量元素含量的下降主要與它們之間的相互抑製作用有關。
본시험이용영양액화토양배양계통，연구불동Fe、Cd처리하근표철막대수도흡수Cd、Mn、Cu、Zn적영향。토양중Fe적수평위0、1、2 g/kg Fe（이FeSO4·7H2O적형식공응），Cd적수평위0、2、10 mg/kg Cd（이3CdSO4·8H2 O적형식공응）。영양액중Fe화Cd적수평분별위0、10、30、50、80、100 mg/L Fe화0、0.1、1.0 mg/L Cd。수획후측정수도근표、근중화지상부Cd、 Fe、 Mn、Cu、Zn함량。시험결과표명，량충배양방식하，수착개질중Fe농도적증가，수도근표철막（ DCB-Fe）축점증다。토양배양방식하，근표철막중Cd화Mn함량수철막량증가이략유증가，소유원소함량균표현위근중대우철막중。영양액배양조건하，근표철막중Mn화Cu함량재고량Fe공응시유소증가， Mn、Cu、Zn표현위철막중대우근중。근표철막중Zn함량재량충배양방식하균미정현일정규률성변화。근중화지상부Cd、Mn、Cu、Zn함량일반도수개질중Fe농도적증가이하강，Cu화Zn함량재가Cd처리중하강。이상결과증명，철막대Cd적흡부조당능력유한，대Mn、Cu、 Zn적흡부작용인배양방식화원소충류불동이유소차이，식주체내미량원소함량적하강주요여타문지간적상호억제작용유관。
In this study , soil and hydroponics culture systems were used to investigate the effects of iron plaque on the uptakes of Cd , Mn, Cu and Zn by rice seedlings supplied with different levels of Fe and Cd .The three iron levels(as FeSO4· 7H2O) were 0, 1 and 2 g/kg in soil culture, and the six levels were 0,10,30,50,80 and 100 mg/L in solution culture.The cadmium levels(as 3CdSO4· 8H2O) were 0,2 and 10 mg/kg in soil, and 0,0.1 and 1.0 mg/L in solution.After harvest, the contentrations of Fe , Cd, Mn, Cu and Zn in iron plaque, roots and shoots were determined.The results showed that the iron plaque (Dithionite-Citrate-Bicarbonate DCB-Fe) on root surface was increased with the increase of Fe concentration in the two culture systems .In the soil culture experiment , the Cd and Mn contentrations in the iron plaque ( DCB-Cd and DCB-Mn) are slightly increased with the increase of external Fe , and the concentrations of all elements in roots are higher than those in the iron plaque .In the hydroponics culture experiment , the Mn and Cu contentrations in the iron plaque are increased only when higher Fe is added, and the contentrations of Mn , Cu and Zn in the iron plaque are higher than those in roots .The contentrations of Zn in iron plaque are not significantly changed in both soil and hydroponics culture experiments . In general, the concentrations of Cd , Mn, Cu and Zn in roots and shoots are decreased with the increase of Fe supply in soil and nutrient solution , and the concentrations of Cu and Zn in the Cd-addition treatments are lower than those in the no Cd-addition treatments.The above results indicate that the iron plaque may play a limited role in Cd uptake and its translocation in rice plants , and the effects of the iron plaque on the uptakes of Mn , Cu and Zn depend on the culture systems and elements species .However, antagonistic interaction between elements probably contributes to the decreases of the concentrations of Cd , Mn, Cu and Zn in roots and shoots .
