Effect of Abiotic Stress on Onion Yield: A Review

Onion (Allium cepa L.) is a spice crop and valuable economic cultivated in variety of environments around the world. Because its export demand, it extremely important terms foreign exchange. Drought stress, waterlogging heat cold salinity stress all have an impact on onion growth, production, yield different ways. A lack water causes low productivity, therefore to increase yield, constant supply needed. Onions are particularly susceptible salt stress. The number bulbs per unit area, height, fresh weight bulbs, affected by irrigation water. It has effect bulbing quality harvested bulbs. Waterlogging major bulb development at various growth stages. onions may prevent moving from source sink, lowering yield. possible flavor can be surrounding climate. response influenced temperature, degree which varies variety. As temperature increases, leaves decreases. diameter, weight, index (bulb/neck diameter) as rises. This review provides in-depth description abiotic