title: [Effects of Sedum plumbizincicola--Oryza sativa rotation and phosphate amendment on Cd and Zn uptake by O. sativa].
abstract: In a pot experiment, hyperaccumulator Sedum plumbizincicola and low-cadmium accumulating Oryza sativa cultivar "Zhongxiang No. 1" were planted in rotation on a heavy metals-polluted soil, and calcium magnesium phosphate (Ca-P) and rock phosphate (P-R) were amended, aimed to study the effects of the rotation and phosphate amendment on the growth of the two plants and the zinc- and cadmium accumulation in their shoots. After the amendment of 50 g P-R x kg(-1), the Zn and Cd uptake by S. plumbizincicola was 11.5 mg x pot(-1) and 0 x 79 mg x pot(-1), respectively, being significantly higher than that after the amendment of 4 g Ca-P x kg(-1). After the planting of S. plumbizincicola, the Zn and Cd concentrations in "Zhongxiang No. 1" increased, but the amendment of Ca-P decreased the accumulation of Zn and Cd in rice shoot significantly. The rotation with S. plumbizincicola and the amendment of Ca-P and P-R could immobilize the Zn and Cd in the contaminated soil as indicated by the quantitative change of NH4OAc-extractable Cd and Zn, and the efficiency of amendment with Ca-P was better than that of amendment with P-R. Field trial showed that amendment with Ca-P could not only increase the rice yield, but also reduce the Zn and Cd accumulation in rice shoot to a certain extent.
authors.affiliation: College of Land and Environment, Shenyang Agricultural University, China. lbshen@issas.ac.cn
authors.forename: Li-bo
authors.initials: LB
authors.lastname: Shen
authors.forename: Long-hua
authors.initials: LH
authors.lastname: Wu
authors.forename: Wei-na
authors.initials: WN
authors.lastname: Tan
authors.forename: Xiao-ri
authors.initials: XR
authors.lastname: Han
authors.forename: Yong-ming
authors.initials: YM
authors.lastname: Luo
authors.forename: You-nan
authors.initials: YN
authors.lastname: Ouyang
authors.forename: Qian-yu
authors.initials: QY
authors.lastname: Jin
authors.forename: Yu-gen
authors.initials: YG
authors.lastname: Jiang
mesh_terms: D000042:Absorption; D000383:Agriculture / Q000379:methods; D002104:Cadmium / Q000378:metabolism*; D002118:Calcium / Q000494:pharmacology; D008274:Magnesium / Q000494:pharmacology; D012275:Oryza / Q000254:growth & development / Q000378:metabolism*; D010710:Phosphates / Q000494:pharmacology*; D031963:Sedum / Q000254:growth & development / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism*; D015032:Zinc / Q000378:metabolism*
chemical_list: D010710:Phosphates; D012989:Soil Pollutants; D002104:Cadmium; D008274:Magnesium; D015032:Zinc; D002118:Calcium