农业是国民经济的基础 ,也是人类赖以生存的物质条件。因此 ,长期以来各国都对农业高度重视并予政策保护。在国际农产品贸易中 ,不论发达国家还是发展中国家 ,既想从农产品贸易中获得好处 ,又处处设置障碍防止本国农业在国际贸易中受到伤害。随着关税措施作用的削弱 ,非关税措 Agriculture is the foundation of the national economy and is also the material condition for human survival. Therefore, for a long time, all countries have attached great importance to agriculture and provided policy protection. In the international agricultural trade, both developed countries and developing countries, both want to benefit from agricultural trade, but also set obstacles everywhere to prevent their agriculture from being harmed in international trade. With the weakening of tariff measures, non-tariff measures