Abstract: Three different nutrition solutions and 3 plant-controlling methods were designed to study physiological effects on tuberization of potato (Solanum tuberosum L.). The results indicate that nutrition formula has significant effects on the ‘source-current-sink’of potato. Applications of nutrition solution A₂ at minimum ratios and maximan ratios of N/K and NH₄⁺-N/NO₃^--N in the early and late growth stages, respectively, can greatly increase plant leaf area, LAD, content of chlorophyll, root activity and number of stolon shoot, mini-tuber number and weight, fresh and dry weights of stem and leaf. CIP24 is found to have the best tuberizing property. Further more, different combinations of plant-controlling, CCC spraying and pruning can increase LAD, shoot fresh weight and root volume, shorten plant height when CTP24 is cultured with A₂.