Irrigation Levels and Fertilization Rates as Pre-Harvest Factors Affecting the Growth and Quality of Hippeastrum

Growing Hippeastrum in an open field or a greenhouse requires precision irrigation and fertilizer to promote plant growth development. Therefore, this research aimed study the effect of level combined with fertilization rate on development Hippeastrum. Two experiments were carried out determine influence growth, flowering, bulb quality In first experiment, bulbs ‘Red Lion’ circumferences 25 cm grown plastic plots using mixed soil as growing media under 50% shading net. Plants irrigated daily until drainage water contained macropores by gravity action (Field capacity: FC) for 90 days after planting (DAP) supplied three different 15N-15P2O5-15K2O rates, i.e., 0, 2.5, 5 g per pot. Plant use efficiency measured at 45, 60, DAP. The results showed that plants 0 had lowest height number leaves DAP, whereas there was no significant treatments flower quality. efficiency, evapotranspiration (ET), crop standard condition (ETc), coefficient (Kc), photosynthetic rate, stomatal conductance decreased when pot second four levels, 100, 75, 50, 25% ETc At 180 deficit treatment (50 ETc) Irrigation 100% 2.5 75% optimum levels