锌是生物必需微量元素，但过多时对动植物都有毒害。本文对锌在人类食物链中的行为及在土壤－植物－人类和动物系统中的迁移，决定农业系统中锌动力学的关键过程，锌在作物可食部位的丰度，影响锌生物有效性的土壤环境、植物因子及锌在食物中的需要量等作了综述和讨论。此外，还简要介绍了锌在食物中的形态。一般认为，动物食品锌含量高且易于吸收． Zinc is a biological essential trace elements, but too much when the plants and animals are poisoned. In this paper, the behavior of zinc in the human food chain and its migration in soil-plant-human and animal systems, the key processes that determine zinc kinetics in agricultural systems, the abundance of zinc at the edible parts of crops, the bioavailability of zinc Soil environment, plant factors and the demand of zinc in food were reviewed and discussed. In addition, it also briefly introduced the form of zinc in food. It is generally believed that animal foods have high zinc content and are easily absorbed.