施用羟基磷灰石对镉污染土壤西瓜品质和镉积累的影响

Effects of Applying Hydroxyapatite on Watermelon Quality and Cadmium Accumulation in Cadmium Polluted Soil

以黄小玉、金鑫、黑马王子3个西瓜品种为试材,研究不同量的羟基磷灰石(HAP)对重金属镉中度污染土壤西瓜镉积累、分布规律和果实品质的影响,旨在验明西瓜在镉中度超标土壤生产时的安全性。结果表明:添加15 kg·(667 m^2)^-1 HAP可以显著降低土壤中有效镉含量和西瓜不同部位镉的积累量;施用HAP对西瓜果实品质影响较小;西瓜植株中镉的分布规律为茎叶>根系>果实;不同西瓜品种对镉的吸收积累存在差异;适宜的西瓜品种在中度镉超标土壤仍能够生产出符合国家食品安全标准的西瓜。

Taking 3 watermelon varieties ‘ Huangxiaoyu’,‘ Jinxin’ and ‘ Heimawangzi’ as material, this experiment studied the effects of different amount Hydroxyapatite （ HAP ） on cadmium accumulation, distribution law and fruit quality of watermelon grown in moderate cadmium polluted soils, so as to verify the safety of watermelon production. The results showed that applying 0.225 t . hm-2 HAP could significantly reduce the content of available cadmium in soil and cadmium accumulation in different parts of watermelon. Applying of HAP had less influence on watermelon fruit quality. The cadmium distribution law in watermelon plant was leaf〉 root 〉 fruit. There existed differences in cadmium absorption and accumulations between different watermelon varieties. Proper watermelon varieties could still produce watermelon in line with the national food safety standard, even in the moderate cadmium polluted soils.