Sorghum has become an important crop option for the second growing season, a period characterized by high instability in water availability. Although sorghum is considered drought-tolerant, studies have been conducted to improve grain yield through the application of biostimulants. Therefore, this study aimed to evaluate the effects of nicotinamide and Azospirillum brasilense, applied individually or in combination, at two sorghum growth stages. The treatments consisted of applying A. brasilense at 10 mL L-¹ and nicotinamide at 300 mg L-¹, either individually or in combination, at two phenological stages (2 and 6), in addition to a control without biostimulant application. Biometric and yield-related traits, as well as the economic performance of the treatments, were evaluated. Among the plant traits assessed, only grain yield was affected by nicotinamide and A. brasilense application. Moreover, all treatments involving biostimulant application increased economic return. For both grain yield and economic return, application at growth stage 6 produced the greatest response. Therefore, nicotinamide and A. brasilense, applied individually or in combination, increased sorghum grain yield and economic return, with the greatest numerical and economic responses observed at growth stage 6.
Matheus Rodrigues Oliveira, B. L. Q. Ribeiro, C. de Castro Seron et al.· Revista de Agricultura Neotr...· 0 citations
The common bean (Phaseolus vulgaris L.) is an important food crop in tropical agriculture. However, fertilization and soil management methods for common beans require further investigation to reduce production costs and increase sustainability. Furthermore, cultivation methods can directly affect GHG emissions. Thus, this study evaluates the CO2 emissions from fuel consumption as a function of soil management and fertilization methods on the common bean crop. The randomized block design was used in a 2 × 3 factorial scheme with six repetitions composed of two fertilization systems (spread and furrow) and three soil management systems: convention-al tillage—CT, minimum tillage—MT, and no-tillage—NT. The productive performance of common beans varies according to fertilization methods and soil management. Field capacity in the (CT) was impaired due to the various mechanized soil preparation operations with 0.30 and 0.32 ha h−1, without a significant effect from the fertilization method. CT system resulted in higher CO2 emissions of 175.74 kg ha−1 and 165.50 kg ha−1; thus, in soil conservation management, these same values were up to 58% lower, with the lowest rates for NT. Crop yield in the MT system presented the best result compared to the CT and NT, with an appropriate cost–benefit ratio for bean production in tropical crops.
A. C. Marques Filho, Weverton Caetano Nunes, C. E. S. Volpato et al.· AgriEngineering· 0 citations
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