关键词: 沙区, 果树, 生理生态特性, 节水灌溉, 适应性

Abstract: Six fruit trees, such as Golden Delicious, Mollies Delicious, Starkrimson, Pyrus bretschnederi, RehdPyrus, Bretschnederi Rehd and jujube etc., were selected as the research materials. Their physiological indexes of Photosynthetic, water and rational irrigation were tested, Pv curves of their rootstocks in common use are protracted and their water parameters, drought resistant characteristics and adaptability to arid environment in desert area were analyzed. Viewpoint and method, which determines rational irrigating scheme of several fruit trees based on water potential and relative water content etc., are first put forward. Meanwhile, with consideration to the growing state of these main fruit trees in Hexi region, their adaptability for ecological environment in Hexi desert area was evaluated comprehensively. Last the paper put forward that "three pear varieties, two jujube varieties and one vintage grape variety" should took for the developmental key point and direction of economical forest in Hexi region in future.

Key words: desert area, fruit tree, physiological-ecological characteristics, water-saving irrigation, adaptability