【摘要】 横断山区干旱河谷有四类,即干热河谷、干暖河谷、干温河谷和干凉河谷。不同河谷类型有与其相适应的果树种类,且不同河谷类型的生态条件与典型落叶果树(如梨、苹果、葡萄、石榴、桃、樱桃等)的高产优质关系密切。由此,区内发展落叶果树生产存在着潜力,并有可能建立三个落叶果树商品基地。更多还原

【Abstract】 The arid valleys of the Hengduan Mountainous Region consist of the valleys of the Minjiang River, the Dadu River, the Anning River, the Yalong River, the Jinsha River, the Lancang River, the Nujiang River and their tributaries. According to the differences of humidity and heat quantity these arid valleys are divided into four types, hot-arid, warm-arid, temperate-arid and cool-arid.The relationship between ecological conditions of different arid valleys and good harvest and high quality of typical decidous fruit trees is discussed. The climatic characteristics in these arid valleys arc.abundent heat quantity≥10℃accumulated temperature 2000-6000℃) , appropriate precipitation (500-600mm),rich sunshine (annual sunshine 1500-2500h), large temperature difference (daily range of temperature 9-12℃) and small humidity (ralative humidity below 70%).This type of climate is specially advantageous to the growth and bearing of fruit trees such as apple, pear, grape, pomegranate, peach, cherry, etc. Specially the guality of apple of this region is one of the best in the whole country. So the arid valleys have big potentiality to grow deciduous fruit trees. Author suggests to set up three commodity bases of deciduous fruit trees. 1. the region of the upper reaches of the Minjiang River, 2. the regions of the upper and middle reaches of the Dadu River and their tributaries;3. the region of the middle reaches of the Anning River and the Yalong River.更多还原