美国大豆育种动向,主要是:一、培育耐水肥的高产品种:美国培育和推广的高产品种如“克拉克63”、“阿姆索”、“韦恩”等品种,亩产较高者达700—900斤,最高的近千斤。今后将着重培育根系发达、维管束效率高和蒸腾效率低的品种。据最近试验,根瘤固氮菌的作用只能满足大豆对氮素养 US soybean breeding trends, mainly: First, the cultivation of high-yielding varieties of water-resistant fertilizer: the United States to cultivate and promote high-yielding varieties such as “Clark 63”, “” Amoso ​​“,” Wayne "and other varieties, Production of up to 700-900 pounds, the highest of nearly jin. In the future, we will focus on cultivating varieties with well-developed roots, high vascular bundles and low transpiration efficiency. According to recent tests, the role of nitrogen-fixing bacteria can only meet the soybean nitrogen nutrient