Shen Li-bo, Wu Long-hua, Tan Wei-na, Han Xiao-ri, Luo Yong-ming, Ouyang You-nan, Jin Qian-yu, Jiang Yu-gen
College of Land and Environment, Shenyang Agricultural University, China.
Ying Yong Sheng Tai Xue Bao. 2010 Nov;21(11):2952-8.
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.
在盆栽试验中，将超富集植物东南景天和低镉积累水稻品种“中香 1 号”在重金属污染土壤上轮作种植，并施加钙镁磷肥（Ca-P）和磷矿石（P-R），旨在研究轮作和磷肥添加对两种植物生长以及地上部锌和镉积累的影响。施加 50 g P-R·kg⁻¹后，东南景天对锌和镉的吸收量分别为 11.5 mg·盆⁻¹和 0.79 mg·盆⁻¹，显著高于施加 4 g Ca-P·kg⁻¹后的吸收量。种植东南景天之后，“中香 1 号”中锌和镉的含量增加，但施加 Ca-P 显著降低了水稻地上部锌和镉的积累。通过醋酸铵可提取镉和锌的定量变化表明，东南景天轮作以及施加 Ca-P 和 P-R 能够使污染土壤中的锌和镉固定，且 Ca-P 的添加效果优于 P-R。田间试验表明，施加 Ca-P 不仅可以提高水稻产量，还能在一定程度上降低水稻地上部锌和镉的积累。
