甘蔗生长期对复合污染土壤重金属的富集能力

Enrichment Capacity of Composite Polluted Soil Heavy Metal of Sugarcane during Growth Periods

在复合重金属污染耕地种植条件下,对甘蔗的苗期与拔节期吸收和富集土壤重金属的能力是否因品种不同而有差异进行了研究,以期筛选出重金属超低积累及适合当地种植的甘蔗品种。结果表明,各品种对于重金属的富集量从苗期到拔节期发生较大变化,差异性也有变化。在苗期各品种富集量最大的是As,最少的是Zn;而到拔节期则相反,富集量最大的是Zn,最少的是As。在复合重金属污染耕地条件下,相对于重金属Zn,在该土壤区域最适合种植园林9号;相对于重金属Cd,在该土壤区域最适合种植赣-18号;相对于重金属Pb,在该土壤区域最适合种植园林9号;相对于重金属As,在该土壤区域最适合种植园林17号。综上所述,园林9号、赣-18号、园林17号这3个品种比较适合在当地污染地上种植,其中以园林9号为相对最适合。

In order to screen uhra-low accumulation of heavy metals and suitable local sugarcane varieties, the ability ab- sorption and enrichment of heavy metal pollution of farmland under complex conditions of sugar cane planting seedling, jointing stage and its differences of varieties were studied. The results showed that heavy metal enrichment of all varieties changed from seedling to jointing stage, Enrichment of As at the seedling stage of all varieties was the largest, Zn was the least., The largest concentration of Zn was at under the jointing stage, As was minimum, at under the jointing stage the complex conditions of heavy metal pollution of farmland, with respect to heavy metals Zn, the soil in the area was suitable for planting was Yuan Lin 9. With respect to the heavy metals Cd, the soil in the area is was suitable for planting was Gan-18. With respect to heavy metals Pb, the soil in the area is most suitable for planting Yuan Lin 9. As with respect to heavy metals, the soil in the area most suitable for planting Yuan Lin 17. Yuan Lin 9, Gan-18, Yuan Lin 17 were suitable for cultivation of local pollution on the ground, among Ynan Lin 9 was the most suitable variety.