Jujube is one of the characteristics fruit in loess hilly and semiarid areas. In recent years, the planting model of high-efficiency water use in hilly dense planted jujube trees make great achievements by means of mountain rainwater-collecting micro-irrigation and dwarf dense planted technology, Irrigation quantity decreased 84.4%, while the average output increased 46.7% compared with traditional furrow irrigation. It can change jujube tree root zone water environment, affect root distribution and promote...