Abstract:

To assess the security of pepper cultivation in Cd contaminated soil effectively and efficiently，the variation of Cd content in 71 pepper genetype materials and the effect of Cd concentration in Cd contaminated farmland soil on Cd content in peppers were investigated through pot and field experiments in detail in the hope of obtaining a threshold value of Cd concentration in farmland soil when planting peppers and screening out Cd-pollution-safe pepper cultivars. It was found that Xiangxin 8，Changyan 201，Changla 7，Xingxiu Chaotianjiao and Bola 9 were potential to be Cd-pollution-safe pepper cultivars grown in the farmland soil with a Cd concentration lower than 0.58 mg · kg^-1，and Cd contents in the 5 pepper cultivars met the requirements of the National Food Safety Standard of China（GB2762-2012）. Furthermore，the influence of pepper bearing period on Cd content in Xiangyan 15 was also investigated，founding that the Cd contents in peppers displayed significant variability in different bearing periods；therefore，the effect of bearing period should also be considered in pepper breeding.

Key words: pepper, cadmium, accumulated rule