Abstract: 101-14M，5BB，1103P，Beta and Cabernet Sauvignon（CS）grafting were chosen as test
materials to study the absorption kinetics of phosphorus and efficiencies of phosphorus. The results
showed that，absorption efficiencies of different rootstocks on phosphorus were 1103P > Beta >
101-14M > 5BB. Cabernet Sauvignon（CS）grafted on different rootstocks. Under normal P-supply and
P-deficiency （20% of normal P-supply），the root length，root surface area，root volume of CS/1103P were
significantly higher than the other three combinations，under the phosphorus stress，the root length of
CS/1103P was higher than CS/101-14M，CS/Beta and CS/5BB respectively 24.53%、22.22%、33.60%；
The root surface area of CS/1103P was higher than the other three respectively 22.77%，30.72%，34.28%；
The root volume of CS/1103P was higher than the other three respectively 23.10%，36.92%，33.35%.
Under normal P-supply，the phosphorus uptake of CS/1103P was higher than CS/101-14M，CS/Beta and CS/5BB respectively 32.08%，40.31%，27.19%；Under the stress of low phosphorus，the phosphorus
uptake of CS/1103P was higher than the other three respectively 47.35%，44.64%，36.90%. The plant
biomass of CS/1103P was significantly higher than the other three combinations. So we can concluded that
1103P is P-efficient root stock，which can be applied in phosphorus deficiency or soil.

Key words: grape, rootstock, absorption kinetics, phosphorus uptake, biomass