Physiological Role of Humic Acid and Nicotinamide on Improving Plant Growth, Yield, and Mineral Nutrient of Wheat (<i>Triticum durum</i>) Grown under Newly Reclaimed Sandy Soil

Abstract

Humic acid is not a fertilizer as it does not directly provide nutrients to plants, but is a compliment to fertilizer. Nicotinamide (Vitamin pp) is a stress-associated compound that can induce and regulate secondary metabolic accumulation and/or the manifestation of defense metabolism in plants. A field experiment was conducted at the experimental station of National Research center at El-Nubaria region, Egypt, to study the role of foliar application of humic acid (as soil conditioner 13 cm/l) and/or priming grains in nicotinamide (vitamin pp 5 mg/l) in saving irrigation water, decreasing fertilizer dose of NPK and at the same time increasing durum wheat (Triticum durum) cultivars' (Beni Sweif-1 and Beni Sweif-3) productivity grown under newly reclaimed sandy soil exposed to drought for three weeks continuously. The results showed that plant treated with humic acid or nicotinamide increased significantly all morphological criteria (plant height, leaves number, fresh and dry weights of shoots), metabolism (photosynthetic pigment, total soluble sugar, total carbohydrates, total amino acids and proline), mineral contents (N, P, K, Ca and Mg) and yield (grain, straw and biology) of both cultivars amended with either recommended or half recommended doses of NPK. Foliar application of humic acid to plant priming in Vitamin pp induced significant increases in all studied parameters (morphology, chemical and yield) of plants amended with recommended or half recommended doses of NPK as compared with control plants. The maximum yields of grain, straw and biology of both cultivars were obtained in response to triple treatment (humic acid + nicotinamide + recommended dose of NPK) or (humic acid + nicotinamide + half recommended dose of NPK) respectively.

Effect of Nitrogen Fertilization and Organic Acids on Grains Productivity and Biochemical Contents of Quinoa Plant Grown Under Soil Conditions of Ras Sader-Sinai

“…On the opposite, N1+ Fol 0 without OM gave the lowest values of N, P and K uptake by straw and were 96.2, 10.5 and 43.7 kg ha -1 , respectively. The previous results agree with those obtained by Khaled and Fawy (2011), Azarpour et al (2014) and El-Bassiouny et al (2014).…”

“…The superior treatment was N 2 Hu 2 As 2 with OM, which recorded the best nutrients content in straw and seeds of quinoa plants under condition of Ras Suder soil during the two studied seasons. The previous results agree with those obtained by Darwinkel and Stølen (1997), Khaled and Fawy (2011), Brunetti et al (2013), Azarpour et al (2014), El-Bassiouny et al (2014) and Geren (2015).…”

“…Canellas and Olivares (2014) also stated that the humic substances increased roots density and absorption of nutrients across the plasma membranes of roots. El-Bassiouny et al (2014) reported that application of humic acid to quinoa increased each of the followings: plant height, number of leaves, shoot growth and weights, photosynthetic pigment, soluble sugar, carbohydrates, amino acids and proline content, uptake of N, P, K, Ca, Mg and seed yield. Khaled and Fawy (2011) reported that foliar spray of humic substances increased the uptake of nutrients by maize grown under salt stress.…”

Doses e parcelamento de niacina no desenvolvimento inicial de meloeiro Cantaloupe

“…No entanto, essas técnicas também devem vislumbrar o equilíbrio da produtividade de alimentos e sua qualidade nutricional. A utilização de vitaminas é, atualmente, pouco explorada, apesar da verificação do seu potencial suplementar à adubação química, tendo em vista as melhorias morfofisiológicas e bioquímicas observadas em plantas cultivadas, como o trigo (EL-BASSIOUNY et al, 2014) e o milho (HASSANEIN et al, 2009).…”

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“…Para a cultura do trigo a pré-embebição de sementes por um período de 12 horas em solução contendo 5 mg L -1 de niacina, promoveu o aumento dos teores de clorofilas a e b e carotenoides, estimulou o acúmulo de carboidratos, induzindo ao maior desenvolvimento da planta e maior produtividade (El-Bassiouny et al, 2014).…”