Abstract: This paper deals with the relationships between water and productivity of seabuckthorn in different habitats of the Loess Plateau in north Shaanxi. The typical habitats were classified with hilltop, sunny, shady, semi-shady and semi-sunny hillside. The results showed that values of transpiration of five kinds of habitats were different, and transpiration of semi-shady was relatively stronger in the morning while others were weaker. With the variation of directions of sunshine, transpiration of shady and sunny was declining and meanwhile transpiration of hilltop was steady. transpiration of semi-shady reached the peak in 12:00. In the afternoon, these values of transpiration all reduced in different extents except seabuckthorn of shady, especially semi-shady. The mean transpiration of 5 habitats was ordered in semi-shade >shade >semi-sunny >hilltop >sunny. There were remarkable difference between diffuse resistance and transpiration, and same relationship was found between relative humidity and transpiration. But this relationship was not found between light intensity and transpiration. Different habitats had different productivities, and productivity of seabuckthorn in shade habitat was higher than those in other habitats.