Study on the Differences in Cadmium Accumulation and Transport among Maize Cultivars
ZHANG Biao
DUAN Enzhong
SHI Zhenya
CHENG Haikuan
ZHOU Zhiyun
ZHOU Zhen
SUN Xiaoxue
MIAO Lijuan
YANG Suqin
Abstract：Field experiment in cadmium(Cd) polluted farmland was conducted to study differences in Cd transportation and accumulation among cultivars by using twenty-five maize cultivars.The results showed that twenty-one cultivars of grain Cd content could meet the hygienic standard for grains GB 2715-2005(0.1 mg/kg or less),but only eight cultivars(Jidan 7 and Nonghua 101,Zhengdan 136,Zhenghan 358,Zhengdan 958,Liyu 37,Liyu 13,Xianyu 335) could reach the hygienic limit standard for grains NY 861-2004(0.05 mg/kg or less).The contents of the Cd for different maize organs in descending order were the root,the stem leaf,and the grain.Further study on the transportation and accumulation of heavy metal confirmed that the differences among cultivars in grain Cd content mainly depended on the Cd transfer capacity from the stem leaf to the grain.These eight cultivars had an average transport coefficient from root to seed of 0.002 9 and enrichment coefficient for seed of 0.007 1.Among them,Jidan 7 and Nonghua 101 have low-accumulation characteristics.
Keywords：maizeCdlow accumulationuptaketransport
Publication Date：2017-09-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 25-29 )