磷对3个甘蔗品种(系)根系形态及磷效率的影响

探索磷对甘蔗生长的影响，为发掘磷高效甘蔗品种提供依据。以ROC10、ROC22和云蔗05-194为材料，采用沙培法种植，设低磷和高磷两个处理，研究3个甘蔗品种（系）的生长、根系形态、根系活力和根系磷效率。结果表明：与低磷处理相比较，高磷水平下ROC22和云蔗05-194的株高增加6.91%、34.99%，植株干质量增加22.59%、44.92%。在低磷水平下ROC10的株高、植株干质量、根长、根表面积、根体积比高磷水平下分别增加19.08%、20.37%、68.90%、74.48%、99.62%。本研究表明，在低磷处理下，ROC10的根系和植株生长较好，表现为相对耐低磷品种。

Effects of Phosphorus on Root Morphology and Phosphorus Efficiency of Three Sugarcane Varieties

The effects of phosphorus (P) levels on the plants growth of sugarcane varieties were studied to provide a scientific basis of high P efficiency sugarcane varieties by a sand pot test. The ROC10, ROC22 and Yunzhe 05-194 were used as materials, and the date including the plant growth, root characteristics, root activity and root P efficiency. The results indicated that plant height and plant dry weight of ROC22,Yunzhe 05-194 were better under high P levels, compared with low P levels, plant height increased by 6.91% and 34.99%, and the plant dry weight increased by 22.59% and 44.92%.Under low P levels, plant height, plant dry weight, root length, root surface area and root volume of ROC10 increased by 19.08%, 20.37%, 68.90%, 19.08% and 99.62%. This study shows that ROC10 grows better under low P stress and showed higher tolerance to low P levels.