Logistic model research on effect of surface film on ammonia volatilization

Pans and field experiments were conducted to investigate the effect of surface film on ammonia volatilization from water. Results showed that surface film could reduce ammonia volatilization significantly, but the effect was correlative to the addition rate of surface film. Logistic model was introduced to simulate the process of ammonia volatilization with surface film applied. Combined with modified parameter c, ammonia volatilization was fitted well by the model.