| On the condition of dryland, bleeding sap of different potato strains was determined to reflect the absorption vitality of root system, and the biological yield and tuber yield were also measured. The results show that, among the six experimental strains, 1-38 produced the highest biological yield and tuber yield, and its absorption vitality of root system was the strongest. There is a very significant positive correlation between root absorption vitality and the yield, that is, the stronger is the absorption vitality of root system,the higher is the yield of potato on dryland. |