关键词: 气温, 气温, 周期, 突变, 特征

Abstract: To provide a theoretical support for the planting of sweet sorghum in heavy metal polluted soil, a soil pot experiment was conducted to observe the growth responses, accumulation and transfer characteristics of sweet sorghum variety ‘( Liaotian No.1’) under different concentrations of lead and cadmium. The results showed that low concentration of Pb (≤100 mg/kg) and Cd (≤ 1 mg/kg) treatment promoted the growth of sweet sorghum, high concentration of Pb (≥ 1000 mg/kg) and Cd (≥ 10 mg/kg) treatment presented an inhibitory effect and the root length, plant height, spike length and biomass were significantly reduced. The heavy metal contents in various parts of sweet sorghum increased with the increase of Pb and Cd concentration in soil, and Cd was accumulated in an order as root＞stem＞leaf＞spike and Pb accumulation order was root＞leaf＞ stem＞spike, the enrichment coefficient and transport coefficient of Cd in sweet sorghum were significantly higher than those of Pb. It is concluded that under Pb and Cd stress, the sweet sorghum variety‘Liaotian No.1’ has high resistance, good capacity of absorption and accumulation as well as good transfer ability，and has certain potential value to remediate Pb and Cd single or combined contaminated soil.