The experiments were conducted to study zinc adsorption and desorption equilibrium, zinc diffusion, move and enrichment in soil, and zinc uptake , accumulation and consumption of plant in paddy and paddy soil system.It was investigated that input and output of zinc in paddy soil for illustrating the cycle of zinc in paddy field ecosystem. Input way and input amount of zinc in proper order were fertilization (organic and chemical fertilizers) > rainfall >irrigation >seedling transplantation; Output way of zi...