水稻品种间对铜的富集和分布差异性特征初探

Distribution and Enrichment of Cu in Rice Variety

研究结果表明,Cu在水稻植株各部位的富集情况是W根系>W茎叶>W颖壳>W米粒,相同部位不同品种之间的含Cu水平存在较大的差异。供试品种中米粒含铜水平最低的是“赣香糯”,其值为10.32 mg/kg,接近国家绿色、无公害大米标准的限值(10 mg/kg),最高的是“赣航晚2号”,其值为28.17 mg/kg。茎叶中的含铜水平与米粒中的含铜水平有很好的正相关,相关系数r=0.91。水稻根系具有较强富集Cu的能力,根系较发达、活力较强的品种其富集铜的能力较强。

The study results show that the concentration order of Cu in different parts of the paddy plant was root 〉 stem and leaf 〉 chaff 〉 grain , the content of Cu in the same part of different obviously varieties varies. The lowest content of Cu is in ＂Ganxiangnuo＂, its value is 10.32 mg/kg , approaching the standard of Green and Innocuous Rice in China（10 mg/kg） , the highest one is in＂ Ganhangwan 2 ＂, its value is 28.17 mg/kg. The Cu content in stem and that in grain have good positive correlation, whose correlation coefficient is r = 0.91. The roots have stronger ability to enrich Cu. Varieties with stronger roots have stronger ability to enrich Cu.