Seed Yield and Fatty Acids Composition of Peanut (Arachis hypogaea L.) Under Magnesium, Molybdenum and Bio-Fertilizers Application in Different Planting Densities.

Peanut optimal planting density is necessary to obtain the maximum yield. Also, peanut as heavy feeder of nutrients needs to be supplemented through foliar application and bio-fertilizer (BF) plays an important role in food safety and sustainable production. This experiment was done in Rasht, Iran, during the 2017–2018 and 2018–2019 cropping seasons and carried out as split-factorial based on randomized complete blocks design with three replications. Three planting densities including 83,333 (PD1), 100000 (PD2) and 125,000 (PD3) plants ha−1 in main plot, four levels of BF including no application of BF as control (Z0) as check, Rhizobium spp. (RB), Arbuscular mycorrhizal fungi (AMF) and the combined application of RB + AMF and three treatments of magnesium (Mg), molybdenum (Mo) and Mg + Mo as factorial 4 × 3 in sub plot, comprised experimental treatments. The tripartite interaction of PD2 × (RB+AMF) × (Mg+ Mo) produced the greatest seed yield (3515 kg ha−1), pod yield (4472 kg ha−1), biological yield (9380 kg ha−1), oil yield (1515 kg ha−1) and protein yield (793 kg ha−1). Also, the application of AMF along with Mo fertilizer increased the content of OA (58.51%) and SA (4.43%) in PD1 treatment. According to the results of this experiment, the inoculation of RB + AMF along with foliar application of Mg + Mo in PD2 treatment enhanced the SY of peanut and combined application of AMF and Mo improved oil quality in PD1 treatment and be recommended to enhance quantitative and qualitative yield of peanut under similar climatic conditions. [ABSTRACT FROM AUTHOR]