9Guo Weihua, Li Bo, Zhang Xinshi, et al. Effects of water stress on water use efficiency and water balance compo- nents of Hippophae rhamnoides and Caragana intermedia in the soil-plant-atmosphere continuum [ J ]. AgroforestrySystems ,2010,80 ( 3 ) :423 - 435.
10Ma C,Gao Y,Guo H,et al. Physiological adaptations of four dominant Caragana species in the desert region of the Inner Mongolia Plateau[ J:. Journal of Arid Environ- ments, 2008,72 ( 3 ) : 247 - 254.