Organic and mineral fertilization determining the agronomic performance of sunflower cultivars and soil chemical attributes

Abstract

This study aimed to verify the effect of the application of filter cake, via soil and in association with mineral fertilization, on sunflower cultivars (Helianthus annuus L.) and the chemical properties of the soil. The experimental design used was randomized blocks in a 3 × 2 factorial scheme with six replicates, totaling 36 experimental units. Three sunflower cultivars (Sany 66, Nusol 4140, and Nusol 4170) and two fertilization strategies (mineral fertilization with and without filter cake) were used. Resorting to the filter cake increased the oil concentration in Sany 66. Mineral fertilization did not significantly affect achene production, with mean values being 2561.58 kg ha-1. However, including filter cake resulted in a 21% increase in phosphorus (P) content in the 0-0.20 m soil layer in sunflower crops of the Nusol 4140 variety. Therefore, fertilization with filter cake, in combination with chemical fertilizers or alone, can be an effective strategy to increase soil P content and oil concentration in sunflower cultivation.

Comportamiento agronómico del pasto insurgente bajo diferentes dosis de residuos sanguíneos líquidos y composición química del suelo

“…Otro punto relevante para considerar en la exploración de fuentes alternativas de fertilizantes orgánicos son los conflictos geopolíticos asociados a las crisis sanitarias (6) , ya que estos conflictos han llevado a aumentos sustanciales en los precios de los fertilizantes químicos, aumentando los riesgos para la seguridad alimentaria. Por ello, la sustitución parcial o total de fertilizantes químicos por alternativas orgánicas puede resultar en una reducción significativa de los costos de producción, haciendo que la producción primaria sea menos onerosa (22,30) .…”

Features of Forming Soil Regimes under Sunflower Cultivation with Different Levels of Biologization in Non-irrigated Conditions of the Southern Steppe of Ukraine

“…Some researchers adhere to a different concept: they declare a scientifically substantiated saturation of agrophytocenoses with sunflower without fundamentally revising the zonal cultivation technology to include elements of biologization (Dehtiarova 2023). The inclusion of elements aimed at optimizing plant life factors in sunflower cultivation technology (and elements of biologization are not an exception in this aspect) aims to transform the basic ecological factors that determine the final seed productivity indicator (Polyakov and Shcherbak 2022;Silva et al, 2023). In the conditions of the Southern Steppe of Ukraine, the water, nutrient, and microbiological regimes of the soil are of crucial importance for sunflower cultivation.…”