Chemical Fertilizers Use Management for Rice Production (A Case Study of Sari Goharbaran)

Soil fertility in an optimal fertilizers use management system which is maximizing yield along with minimizing environmental damages is so critical. Nitrogen (N), phosphorus (K) and potassium (P) are the most important required nutrients for plant growth. Since the use of chemical fertilizers could create serious dangers for the environment and community health, the purpose of this study is determination of the optimal combination of fertilizers used for rice production in the Goharbaran of Sari using Goal Programming Model and the Game Theory. Required data for this study was collected by questionnaires and interviewing the 198 farmers during the 2014-2015 crop years. The results of this study showed that the amount of fertilizers use for Tarom and Shiroodi rice have not been optimal by representative farmers, so that on average, fertilizers use for Tarom and Shiroodi rice is more than optimal value, and it has increased soil pollution to chemical material. Following the presented optimal pattern in this study for fertilizer use, reducing soil contamination to chemicals, reduce the cost of fertilizers and increase the production per unit of fertilizer. Therefore, farmers can manage the use of chemical fertilizers concerning the results of the current and similar studies. Furthermore, agricultural organizations also should try in promoting the cultivation of organic products.