Efficiency of Phosphorus Use in Sunflower

Abstract

Sunflower is an oleaginous plant of great importance worldwide that stands out in the production of edible oil and human food. The identification of differences between cultivars regarding the use of phosphorus and the production of achenes at different levels of phosphate fertilization is a viable strategy to allow its cultivation in soils with different concentrations of phosphorus, without compromising yield and reducing environmental damage associated with excessive applications of phosphate fertilizers. Thus, the objective of this study was to evaluate different levels of phosphorus fertilization and sunflower cultivars regarding the efficiency of phosphorus use in two agricultural crops. The experimental design was in randomized blocks with four replications in split-plots, where four doses of phosphorus (50, 100, 150, and 200 kg ha−1 of P2O5) were allocated in the plots, and in the subplots three sunflower cultivars (Aguará 06, Altis 99, and BRS 122). The phosphorus use efficiency of sunflower cultivars was estimated through agronomic efficiency, vegetative efficiency, agrophysiological efficiency, apparent recovery efficiency, and utilization efficiency. The dose of 50 kg ha−1 of P2O5 provided the best phosphorus efficiency indices for the different sunflower cultivars in the two studied crops. Cultivar Aguará 06 was more efficient in conditions with P2O5 supply below 150 kg ha−1, regardless of the crop. Sunflower cultivars had the best efficiency indices of phosphorus applied in the 2016 harvest.

Effect of BioNiK-Phos and Phosphorus-based fertilizers on yield of hybrid sunflower in Northern Uganda

“…The implication of this finding is that soil testing, soil fertility management and improvement could be used as a strategy for increasing hybrid sunflower productivity in northern Uganda. Oliveira et al (2022) described the benefits of Phosphorus fertilization for sunflower. Other studies have also shown that phosphorus application promotes growth and increases sunflower yield (Abaca et al, 2022;Sadozai et al, 2022).…”

Effects of Different Kinds of Fertilizers on the Vegetative Growth, Antioxidative Defense System and Mineral Properties of Sunflower Plants

“…As a result, farmers have initiated to utilize of organic fertilizers to improve soil chemical and physical structure. Crop productivity is increased by carefully adjusting agricultural methods such as fertilization, tillage, and removal of weeds [14][15][16][17]. There are several kinds of organic fertilizers, such as biofertilizers which are considered the most recent eco-friendly technique for promoting sustainable agriculture.…”

Desempenho agronômico de variedades de girassol em função de populações de plantas

“…Para tanto são realizados ensaios em diferentes ambientes para determinação do comportamento agronômico dos genótipos de girassol disponíveis e sua capacidade de adaptação (TARSITANO et al 2016). Tais variedades podem apresentar diferentes características em relação à altura de plantas, área foliar, tamanho de capítulo, resposta à adubação, resistência a pragas e doenças, dentre outras (MARCHESINI et al 2018, TAHA et al 2018, SOARES et al 2020, OLIVEIRA et al 2022). Estas variações podem ter um efeito direto na interação da planta com as condições de cultivo, em especial a densidade de plantas utilizada na implantação da lavoura (SILVA & ALMEIDA 1994).…”