我国北方有史以来以旱作为主。其中抗旱性强的高粱作物,在北方各省都有较大的种植面积。尤其是山西省晋西北的黄土丘陵区,常年高粱种植面积在百万亩以上,单产较高,既是主要食粮,也是饲料和轻工业的主要原料。然而,由于我国长期以来只重视水地育种而忽视旱地育种,使这些干旱地区无对路品种,遇到严 The northern part of our country has been dominated by drought. Among them, sorghum crops with strong drought resistance have larger planting areas in all the northern provinces. Especially in loess hilly areas in northwestern Shanxi Province, perennial sorghum has a planted area of ​​more than 1 million mu and a high yield, both as a staple food and as a major raw material for feed and light industry. However, due to our long-term emphasis on water breeding and neglect of dryland breeding, so that these dry areas have no way to encounter serious problems encountered