Abstract: A 2-year investigation was made on the characteristics of canopy interception of Pinus tabulaeformis, Robinia pseudoacacia, Caragana korshinskii, and Salix psammophila plantations in the Liudaogou watershed in a farming-pastoral zone of Loess Plateau. The canopy interception and the throughfall of the four plantations had significant positive correlations with precipitation, and the canopy interception could be expressed as a power function of precipitation. The average interception of the plantations was 167% for P. tabulaeformis, 116% for R. pseudoacacia, 112% for C. korshinskii, and 128% for S. psammophila. Simulation result showed that modified Wang’s model could more accurately estimate the canopy interception of the representative tree and shrub plantations in semiarid region of Loess Plateau.

Key words: Cchinensis varbrevisepala, Population characteristics, Endangering mechanism