3　入世后化肥分销体制调整的基本依据3·1　粮食安全与化肥使用( 1 )　粮食安全的重要性2 0世纪 2 0年代以来 ,欧美等工业化国家对粮食和农业的生产和流通一直进行较强的干预 ,形成了相当稳定的一系列配套政策。美国的格林沃尔德主编的《现代经济辞典》一书中指出 :“美国基本 3 BASIC FUNDAMENTAL ADJUSTMENTS TO THE CHEMICAL FERTILIZER DISTRIBUTION SYSTEM AFTER JOINING THE WORLD 3.1.1 The Importance of Food Security and Fertilizer Use (1) The Importance of Food Security Since the 1920s, the industrialized countries such as Europe and the United States have consistently carried out stronger production and circulation of food and agriculture The formation of a very stable series of supporting policies. According to the “Modern Economic Dictionary” edited by Greenwald in the United States, "The basic principle of the United States