Organic and mineral fertilizer application in upland rice irrigated by sprinkler irrigation: economic analysis

Abstract

Organic fertilizers produced by agro-industrial waste are sources of nutrients for plants, making it relevant to study their technical and economic efficiency in several crops as well as in upland rice irrigated by sprinkler irrigation. Thus, this study aimed to conduct an economic analysis of the application of organic fertilizer made from fridge waste and mineral fertilizer in two upland rice cultivars irrigated by sprinkler irrigation. The experiment was conducted in the agricultural years 2009/2010 and 2010/2011, in Selviria - MS. Treatments consisted of two rice cultivars with different characteristics (BRS Primavera - intermediate type and IAC 202 - modern type) and six combinations of mineral and organic fertilizer at sowing (100% mineral fertilizer, 80% mineral fertilizer + 20% organic fertilizer, 60% mineral fertilizer + 40% organic fertilizer, 40% mineral fertilizer + 60% organic fertilizer, 20% mineral fertilizer + 80% organic fertilizer and 100% organic fertilizer). Total Operating Cost, Gross Revenue, Operating Profit, Profitability Index, Equilibrium Yield and Equilibrium Price have been estimated. It was concluded that, in the year without excessive rainfall (2009/2010), BRS Primavera cultivar in association with 40% mineral fertilizer + 60% organic fertilizer has obtained higher yield. However, the highest profit was obtained with IAC 202 with 80% mineral fertilizer + 20% organic fertilizer. In the year with heavy rainfall in sowing and harvesting season (2010/2011), IAC 202 cultivar with 100% organic ferti­lizer has obtained higher yield and profitability. Additional keywords: agro-industrial waste; Oryza sativa L.; profitability; total operating cost.