农业土壤中Cd的主要输入途径是大气沉降、磷肥和固体废弃物。随工业污染排放标准的提高,肥料则成为土壤Cd的重要输入源。欧共体国家土壤Cd的输入总量中,肥料占50%(334t),大气沉降18%,牲畜粪便14%,而污泥仅为3%(20.4t)(vanderVoetetal.,1994)。肥料是保持世界农业持续生产的关键 The main input routes for Cd in agricultural soils are atmospheric deposition, phosphate fertilizer and solid waste. With the improvement of industrial pollution discharge standards, fertilizer has become an important input source of soil Cd. In the total EC input to soil in the EC countries, fertilizers accounted for 50% (334t), atmospheric sedimentation 18%, livestock excrement 14%, while sludge was only 3% (20.4t) (vander Voetetal, 1994). Fertilizer is the key to sustaining the world’s agricultural production