Two filed experiments were carried out during the winter seasons of 2016/2017
and 2017/2018 at the Experimental Farm, El-Gemmeiza, Agric Res. Station, (ARC), Gharbya
Governorate (Middle Delta, Egypt), to study the effect of nitrogen fertilization at 90 and 120 kg/fad.,
and some stimulants; viz, salicylic acid (SA at 100 mg/l ), lithovit at 2 g/l and algae extract at 2%,
beside unsprayed treatment on dry weight, yield, bulb quality and storability of garlic, Balady
cultivar under clay soil conditions using flood irrigation system. The obtained results revealed that,
the interaction between using 120 kg N/fad., and lithovit at 2 g/l increased dry weight of bulb, leaves
and total dry weight/plant, N, P and K contents in bulb and leaves mineral uptake, uptake by bulb,
leaves and their total uptake by plant as well as total chlorophyll in leaves, average bulb weight,
marketable and total yields/faddan. While, the interaction between using 90 kg N/fad., and lithovit or
SA increased nitrogen use efficiency, dry matter (DM). TSS, Pungency in bulbs at harvesting time
and decreased total weight loss percentage after 180 days from storage in both seasons. The relative
increases in total yield/fad., were about 41.96 and 61.11% for the interaction between fertilizing
garlic plants with 120 kg N/fad., and spraying with lithovit at 2 g/l over 90 Kg N without spraying
with stimulants in the 1st and 2nd seasons, respectively. In the same time, the interaction between 90
kg N/fad., and lithovit recorded increases in total yield/fad., were about 9.59 and 10.10% over the
plants which received 120 kg N/fad., without spraying with stimulants in the 1st and 2nd seasons,
respectively.