干旱沙区几种果树生理生态特性及其适应性研究

选择沙区栽培的金冠苹果、毛里斯苹果、新红星苹果、苹果梨、锦丰梨、民勤小枣等主要的经济树种及其常用砧木为研究对象,进行了各树种光合、水分生理指标和合理灌水生理指标的测试分析及各树种和其常用砧木PV曲线的绘制。分析讨论了几种果树的主要水分参数、抗旱特性及对沙区干旱环境条件的适应性,首次提出以水势和相对含水量等生理指标来确定几种主要经济树种合理灌水方案的观点和方法。同时结合几种主要经济树种在河西生态环境条件下生长表现情况,对它们在河西沙区的适应性进行了综合评价,提出河西沙区今后应以"三梨二枣和酿酒葡萄"作为经济林发展重点和方向。

Studies on Physiological-Ecological Characteristics And Adaptability of Several Fruit Trees in Desert Area

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.