Abstract: The edible parts of six main crops (Oryza sativa, Zea mays, Ipomoe a aquatica, Ipomoea batatas, Solanum tuberosum, and Cucurbita moschata) an d corresponding root-zoning soil samples in Chongqing were collected to measure their Pb, Cr, Zn, As, Hg, Cu, Ni, and Cd contents, with the enrichment levels of and the synergistic/exclusion relationships between these metals in test crops were discussed. The heavy metals content in the edible parts of the crops was in the order of grain>rootstalk>melon and fruit, and the enrichment level of the metal s was the highest in O. sativa and the lowest in C. moschata. The enrich ment level of Cr in I. batatas and I. aquatica and of Cd in O. sativa depend ed on the soil Cr and Cd contents, respectively, while the enrichment level of A s in S. tuberosum had a significant negative relationship with soil As content. Both the synergistic and exclusion relationships between the metals in test crop s were observed, but in general, synergistic relationship was more existed than exclusion relationship. In most cases, the relationships between Zn and Cu, betw een Cd and Ni, and between Cr and Ni were synergistic, being available for the p hytoremediation of the regions with multiple heavy metals pollution.

Key words: Non-photosensitivity, Extra-prematurity, Winter wheat variety Dongzao 5, Photo-thermal characteristics