Análise econômica e viabilidade energética da cultura do feijoeiro comum sob irrigação

Abstract

RESUMOEste trabalho foi realizado com o objetivo de avaliar a viabilidade econômica e energética da cultura do feijoeiro comum de terceira safra com lâminas de irrigação na região Noroeste do Paraná. O experimento foi implantado com seis lâminas de irrigação e quatro repetições, em delineamento de blocos ao acaso. A cultura do feijoeiro não foi viável economicamente sem irrigação. Os lucros cresceram com o aumento das lâminas de irrigação atingindo um lucro operacional total de R$1.427,24 ha -1 na lâmina de 333 mm. O preço de equilíbrio sem irrigação foi de R$ 134,06 e R$ 152,65 a saca, em curto e longo prazos, respectivamente. A irrigação favoreceu o balanço energético (energia extraída/energia utilizada) de maneira linear atingindo 1,63 na aplicação da maior lâmina (333 mm).Palavras-chave: custo operacional de produção, manejo de irrigação, terceira safra, balanço de energia Economic analysis and energetic viability of the common bean crop under irrigation ABSTRACT This study was conducted to evaluate the economic and energetic viability of the third season of common bean under irrigation depths in the northwestern region of Parana. The experiment was established with six irrigation levels and four replications in a randomized block design. The bean crop was not economically viable without irrigation. Operating profit increased with increasing irrigation depths, reaching a total operating profit of R$ 1,427.24 ha -1 by 333 mm irrigation depth. The equilibrium price without irrigation was R$ 134.06 and R$ 152.65 bag -1 , short and long term, respectively. The irrigation favored the energy balance extracted (energy/used energy), reaching 1.63 in the application of greater depth (333 mm).

Impact of Irrigation and Nitrogen Fertilization on the Energy Balance and Energy Return on Investment of Jatropha Production

“…Gomes et al (2013), in a study with common bean, also observed increment of EROI with plant under irrigated condition. In this study, irrigation promoted an increase of 52, 63, 34, and 203% in EROI for fertilization levels N150, N100, N50, and N0, respectively.…”

“…According to Cavalett & Ortega (2010), Macedo et al (2008), and Gomes et al (2013), the highest energy consumption in agricultural phase or the on-farm activities is expected. It emphasizes the importance of improving the crop production system by implementing and adequate crop management such as fertilizer and water use efficiency.…”

Economic and Energy Viability of Sunflower Irrigated Crop

“…Jordan et al (2012a) also found that inputs were responsible for mo re than 90% of the energy demand in sunflower cultivation without irrigation. In general, inputs are main ly responsible for energy demand in conventional agriculture (Checheto et al, 2010;Go mes et al, 2013). The average energy used (EU) to produce the sunflower crop without irrigation was 8365 MJ ha -1 (Table 10), with 100.03 MJ consumed in the form of energy depreciation (Table 9), 9 MJ of energy of hand of (EHO).…”

“…Irrigation is among the technologies that most contributes to the increase of productivity (Lira et al, 2015;Pereira et al, 2015); however, it also increases the input (consumption) of energy in the agricultural system. In this sense, some studies have been carried out over the last years aiming to analyze the energetic ratio of irrigated crops (Go mes et al, 2013, Jordan et al, 2012aJordan et al, 2012b).…”

Economic of the irrigated production of forage millet

“…The technical and economic sustainability can be determined by quantifying the level of production relative to the number of inputs necessary to reach the desired level of production (GOMES et al, 2013). The conversion of forage dry matter into animal weight depends, among other factors, on the supply of animal feed.…”