The hydrogenionic potential (pH) is one of the parameters that characterize the quality of water for irrigation, and can influence soil microbiology and the cation exchange process between soil and plant. However, there are few studies related to the pH of irrigation water for hop culture. According to this, our work aimed to evaluate the irrigation effect with different water pH ranges on the agronomic development of hops grown in a greenhouse, in Botucatu, state of São Paulo, Brazil. It was used a completely randomized design (CRD), with three treatments (pH levels) and ten replications. The treatments consisted of three water pH levels: T1 – 6 to 6.5, T2 – 6.5 to 7, and T3 – 7 to 7.5. To obtain the different pH ranges were used solutions of 0,1 mol L⁻¹ of sodium hydroxide (NaOH), and phosphoric acid (H₃PO₄). Gas exchanges, nutritional content in plant leaf tissue, yield, and alpha and beta-acids concentration were evaluated. The results obtained allowed us to conclude that the pH range 6.5 to 7 promotes greater availability, absorption, and accumulation of K in plant leaf tissue, as well as greater photosynthetic capacity, in addition to greater yield between treatments. The preliminary values of alpha and beta-acids were higher in plants irrigated with the water pH of T1, indicating that possible stress may favor the production of these compounds.

氢离子势（pH）是表征灌溉用水水质的参数之一，可影响土壤微生物和土壤与植物之间的阳离子交换过程。但是，很少有与啤酒花培养用灌溉水的pH有关的研究。据此，我们的工作旨在评估在巴西圣保罗州博图卡图的温室pH下，不同水pH值范围下的啤酒花对农艺发展的灌溉效果。它使用了完全随机的设计（CRD），进行了三种处理（pH值）和十次重复。处理包括三个水的pH值：T1 – 6至6.5，T2 – 6.5至7和T3 – 7至7.5。为了获得不同的pH范围，使用了0.1 mol L ^-1的氢氧化钠（NaOH）和磷酸（H₃ PO ₄）。评估了气体交换，植物叶片组织中的营养成分，产量以及α和β-酸的浓度。获得的结果使我们得出结论，pH范围为6.5至7可以促进植物叶片组织中钾的更多有效性，吸收和积累，以及更高的光合作用能力，以及两次处理之间的更高产量。用T1的水pH灌溉的植物中α和β酸的初步值较高，表明可能的胁迫可能有利于这些化合物的生产。