6个水稻品种对Cr、As、Zn、Pb和Cu吸收积累的差异性

以6个水稻品种为研究对象,通过在复合污染土壤中进行盆栽试验,并采用ICP-MS、ICP-OES和原子荧光法,探讨不同水稻品种对重金属Cr、As、Zn、Pb、Cu元素富集能力的差异性,旨在筛选出对不同重金属元素低积累或高富集的水稻品种。结果表明,6个水稻品种对5种重金属元素吸收积累的能力是ZnPbCrCuAs;水稻根系重金属含量是地上部茎叶含量的1.23~43.76倍;株两优173、中早35、隆平006、陆两优996分别对重金属Cr、As、Zn、Cu元素的转运系数最小,可作为其低积累水尹稻品种进一步研究;金优463、Y两优85、陆两优996、Y两优85分别对重金属Cr、As、Zn、Cu元素的富集能力最强,可作为其高富集水稻品种进一步研究;隆平006根系和茎叶对重金属Pb元素的富集系数同时达到最大,转运系数却最小,因此其作为重金属Pb元素低积累还是高富集品种筛选有待进一步探索;植株生长的顺序是中早35﹥陆两优996﹥株两优173﹥隆平006﹥金优463﹥Y两优85,茎叶As和Cu含量是影响水稻植株生长的主要因素。本研究结果可为进一步研究低积累水稻品种的遗传机理差异性,以及在江西省不同地区实际推广应用和安全种植提供参考。

Differences in the Uptake and Accumulation of Cr,As,Zn,Pb and Cu from Soil Among Six Rice Cultivars

A series of pot cultivation experiments were carried out by ICP-MS,ICP-OES and atomic fluo-rescence spectrometry,to study the differences among six rice cultivars in accumulation of heavy metals ( Cr,As,Zn,Pb,Cu) among six rice cultivars,for screening out rice cultivars with lower accumulation or higher en-richment of heavy metals.The results showed that the falling sequence of their ability in the uptake and accu-mulation of 5 heavy metals was Zn>Pb>Cr>Cu>As;the contents of heavy metals in the root of rice were 1.23~43.76 times more than those in stem and leaves; Zhuliangyou-173, Zhongzao-35, Longping-006, Luliangyou-996 had respectively the minimum transference coefficient of Cr,As,Zn,Cu,thus they were their low-accumu-lation cultivars suitable for further study; Jinyou-463,Y Liangyou-85,Luliangyou-996 had respectively stron-gest enrichment ability of Cr,As,Zn,Cu,thus they were their high-enrichment cultivars suitable to take further study;Longping-006 had the maximum enrichment coefficient of Pb,both in roots and stems/leaves,but the minimum transference coefficient.Therefore,it was suitable for further research to determine whether it’s a low-accumulation cultivar of Pb or a high-enrichment cultivar.The falling sequence of rice plant growth was Zhong-zao-35>Luliangyou-996>Zhuliangyou-173>Longping-006>Jinyou-463>Y Liangyou-85. As and Cu contents of the stem and leaves were the main factors to affect their plant growth.The results of this study will provide ref-erences for further study on genetic mechanism differences of low-accumulation rice cultivars and their practi-cal field application and plant security in Jiangxi Province.