Abstract:To study cadmium(Cd) accumulation and transport in upland cotton, ahydroponics experiment screened ten cotton low-Cd-accumulation varieties at the seedling stage. Result showed that five high-Cd accumulators were identified: Xiang X1251, Xiang FZ001, Xiang FZ031, Xiangzamian 23, and Xiang Z4, representing 50% of the tested varieties. Cd accumulation in aboveground parts exhibited a strong positive correlation with aboveground biomass and a positive correlation with lint yield. Regression analysis revealed a positive relationship between aboveground biomass (X1) and Cd accumulation(Y2): Y2=2 700.008+1.087X1, R2=0.618. Cd enrichment varied significantly among plant parts with fibers showing the weakest and leaves showing the strongest enrichment. Xiang X1251 seeds had the Cd enrichment coefficient exceeded 1, indicating strong Cd enrichment capability, while the other nine varieties had coefficients below 1, suggesting that most cotton varieties had weaker Cd enrichment. Three varieties, Xiangzamian 23, Xiang FZ001, and Xiang FZ031, had lint yields all exceeded 1 000 kg/hm2, cottonseed Cd enrichment coefficients below 0.7, and aboveground Cd accumulation exceeding 10 000 mg/hm2, making them suitable for Cd-contaminated farmland.