联合国预测世界人口到２０４０年将达到９０亿。为了给急剧增长的世界人口提供充足营养，世界上贫瘠土地种植小麦的单产量也必须迅速增长。世界上目前共有耕地８０亿英亩，但其中近２５亿英亩为铝含量极高酸性耕地。在这种酸性耕地里，在表层土壤下面往往就存在铝，而铝对植物 The UN predicts that the world’s population will reach 9 billion by 2040. In order to provide adequate nutrition to a rapidly growing population of the world, the yield per unit of wheat grown in barren land in the world must also increase rapidly. There are currently 8 billion acres of arable land in the world, but nearly 2.5 billion acres of them are extremely acidic areas with high levels of aluminum. In this acid soils, there is often aluminum beneath the surface soils, while aluminum is on the plants