The article is based on self-produced rice’s controlled release fertilizers to study the different membrane thickness and adding inhibitor on nutrients releasing rules and rice’s absorbing characters by field experiments. The results are: the nutrients releasing rate of controlled release fertilizers are lower than routine compound fertilizer, the treatment of 8% membrane thickness is prior to 5% membrane thickness; after adding inhibitor, the soil available nitrogen is higher than routine compound fertilizer evidently; the nutrients absorbing of 8% membrane thickness are higher than that of 5%, which can meet the nutrient need at the later stage; the nitrogen absorbing amount of adding inhibitor are higher than non-adding treatments. On the condition of equal pure nutrients of fertilizers, the increasing extent of adding inhibitor and coating membrane is the most distinct.
