TITLE:
Physiological Role of Humic Acid and Nicotinamide on Improving Plant Growth, Yield, and Mineral Nutrient of Wheat (Triticum durum) Grown under Newly Reclaimed Sandy Soil
AUTHORS:
Hala Safwat Mohamed El-Bassiouny, Bakry Ahmed Bakry, Amany Abd El-Monem Attia, Maha Mohamed Abd Allah
KEYWORDS:
Humic Acid, Metabolism, Mineral Ions, Nicotinamide, Wheat
JOURNAL NAME:
Agricultural Sciences,
Vol.5 No.8,
July
22,
2014
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.