Soil Chemical Properties and Growth of Sunflower (Helianthus Annuus L.) as Affected by the Application of Organic Fertilizers and Inoculation With Arbuscular Mycorrhizal Fungi

Abstract

The use of organic fertilizers and the inoculation of mycorrhizal fungi in the cultivation of oil crops is essential to reduce production costs and minimize negative impacts on natural resources. A field experiment was conducted in an Argissolo Amarelo (Ultisol) with the aim of evaluating the effects of fertilizer application and inoculation of arbuscular mycorrhizal fungi on the growth attributes of sunflower (Helianthus annuus L.) and on soil chemical properties. The experiment was conducted at the Federal University of Rio Grande do Norte, Brazil, using a randomized block design with three replicates in a 4 × 2 factorial arrangement consisting of four treatments in regard to application of organic fertilizer (liquid biofertilizer, cow urine, mineral fertilizer, and unfertilized control) and two treatments in regard to arbuscular mycorrhizal fungi (with and without mycorrhizal fungi). The results showed that the physiological attributes of relative growth rate and leaf weight ratio were positively influenced by fertilization, compared to the control treatment, likely brought about by the Apolino José Nogueira da Silva et al.supply of nutrients from the fertilizers applied. The growth and productivity attributes were positively affected by mycorrhization.Keywords: nutrient uptake, Ultisol, organic fertilizers, growth attributes. RESUMO: PROPRIEDADES QUÍMICAS DO SOLO E CRESCIMENTO DE GIRASSOL (Helianthus annuus L.) EM RAZÃO DA APLICAÇÃO DE FERTILIZANTES ORGÂNICOS E INOCULAÇÃO COM FUNGOS MICORRÍZICOS ARBUSCULARES O uso de fertilizantes orgânicos e a inoculação de fungos micorrízicos no cultivo de oleaginosas é essencial para reduzir os custos de produção e minimizar os impactos negativos

<b>Mycorrhizal association in soybean and weeds in competition

“…The screen factor was not significant; in other words, root contact in the competitive process did not alter the percentage of mycorrhizal colonization of soybean. Mycorrhizal symbiosis strongly influences the patterns and intensity of effects of intra and interspecific competition between weed, and the benefit degree of the species is consequence of the plant mycorrhizal dependence (Rinaudo, Bárberi, Giovannetti, & Van Der Heijden, 2010;Silva et al, 2015). As observed, other species involved in the competition process also presented influences of mycorrhizal associations.…”

Response of Seeds Quality of Sunflower to Inoculation with Single and Mixed Species of Indigenous Arbuscular Mycorrhizal Fungi

“…However, AMF species could influence protein content differently. Silva et al [39] found that crude protein levels in seeds were not significantly affected by inoculation of sunflower with Glomus fasciculatum. On contrary, protein content was enhanced in seeds of soya inoculated with Glomus mosseae [40], maize inoculated with AMF mixture (Glomus intraradices, Glomus aggregatum, Glomus viscosum, Glomus etunicatum, and Glomus claroideum) [41], and wheat inoculated with G. intraradices and G. mosseae [30].…”

A Preliminary Study on the Response of Confectionery Sunflower (Helianthus annuus L.) to Arbuscular Mycorrhizal Fungi (AMF)

“…Mycorrhizal fungi induce plant growth through increasing the availability of mineral nutrients such as P, Zn and Cu (Phiri et al, 2003). Inoculation of roots with AMF can also reduce the harmful effects of chemical fertilizer used in conventional farming (Silva et al, 2015), increase plant defense mechanisms to alleviate different stresses (Mayer et al, 2017) and aid in weed control (Veiga et al, 2011). In addition, colonization of arbuscular mycorrhiza (AM) in the rhizosphere enhances growth (Jalaluddin and Hamid, 2011;Silva et al, 2015) and morphological parameters (Kavitha and Nelson, 2014) in sunflower.…”

“…Inoculation of roots with AMF can also reduce the harmful effects of chemical fertilizer used in conventional farming (Silva et al, 2015), increase plant defense mechanisms to alleviate different stresses (Mayer et al, 2017) and aid in weed control (Veiga et al, 2011). In addition, colonization of arbuscular mycorrhiza (AM) in the rhizosphere enhances growth (Jalaluddin and Hamid, 2011;Silva et al, 2015) and morphological parameters (Kavitha and Nelson, 2014) in sunflower. AMF applications increased head diameter, seed number in head, seed and oil yield and oil percentage when compared with nontreatment (control) (Soleimanzadeh, 2010).…”