Effect of some micronutrients foliar application on chemical characters of two groundnut cultivars

Abstract

Two filed experiments were carried out in two successive summer seasons (2016 and 2017) at the Production and Research Station, National Research Centre, El- Nubaria Province, El-Beheira Governorate, Egypt to investigate the response of two groundnut (Giza 6 and Gregory) cultivars to some micronutrients foliar application i.e. Zinc, Manganese and Boron and their interaction with different growth stages on some chemical traits of groundnut seeds (macro and micronutrients seed content (%), essential and non-essential amino acids composition, saturated and unsaturated fatty acids composition and saturated and unsaturated fatty acids ratios) under reclaimed sandy soil condition. The data showed that groundnut cultivars were differed in macronutrients seed content (%) affected by micronutrient foliar spraying application treatments, Giza 6 surpassed Gregory cultivar in macronutrient seed content (N, P and K %), where the lowest values of macronutrients seed content % were observed by control treatments (without foliar application). The highest micronutrients seed content were obtained by the mixture of thrice micronutrient foliar application treatment (Zn + Mn + B) with Giza 6 and Gregory cultivars, which records 107.65 and 96.47, 50.65 and 55.0, 27.95 and 26.20, 1.60 and 1.83 (ppm) for Fe, Zn, Mn and B, respectively. Amino acids profile of seed protein indicated that Leucine and Phenylalanine acids were the major content of essential amino acids in the seed protein content. The interaction between groundnut cultivars and micronutrients foliar application on non-essential amino acids composition that, Giza 6 surpassed Gregory cultivar in most non-essential amino acid; aspartic, serine, glutamic, glycine, argnine, proline and cystine, while Gregory cultivar recorded highest value of alanine, histidine. Slightly differences were observed between groundnut cultivars and micronutrients foliar spraying treatments on unsaturated fatty acid composition. Gregory cultivar recorded the highest value of oleic/linoleic ratio (1.88) when treated with dual application of micronutrients foliar Zn + B. On the contrary, the least value of O/L ratio recorded 1.77 with Gregory cultivar when treated with control treatment.