Gladiolus is one of the most important bulbous flowers produced worldwide. The objective of this study was to evaluate the combined effect of irrigation and soil mulching on soil water conservation and its effect on gladiolus floral stem quality. Two field experiments were conducted with gladiolus at the Federal University of Santa Maria, state of Rio Grande do Sul, Brazil, during 2019 and 2020. The experimental design was a completely randomized three-factor design, with two cultivars (Red Beauty and T704 in experiment 1 - E1 and Red Beauty and Jester in experiment 2 - E2), two cultivation systems (soil mulched with straw and bare soil) and two water regimes (irrigated and non-irrigated) as treatments. When gladiolus plants reached the R2 stage (harvest point), total stem length, spike length, stem diameter and final number of florets were evaluated. Variables were subjected to analysis of variance and Tukey's test at 5% of error probability. Irrigation improved the quality of floral stems, with greater stem and spike length, greater diameter and number of florets per spike, thus resulting in stems with greater decorative value. The soil covered with straw did not influence the quality parameters of the floral stem of the gladiolus, the only observed difference between cultivars being the variable length of the spike.

中文翻译：

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灌水覆土提高唐菖蒲花茎品质

唐菖蒲是世界上最重要的球茎花卉之一。本研究的目的是评估灌溉和土壤覆盖对土壤水分保持的综合作用及其对唐菖蒲花茎品质的影响。2019 年和 2020 年期间，在巴西南里奥格兰德州圣玛丽亚联邦大学对唐菖蒲进行了两次田间试验。试验设计是完全随机的三因素设计，有两个品种（Red Beauty 和 T704）实验 1 - E1 和实验 2 - E2 中的 Red Beauty and Jester），两个栽培系统（用稻草和裸土覆盖的土壤）和两个水体（灌溉和非灌溉）作为处理。当唐菖蒲植株达到 R2 阶段（收获点）时，总茎长、穗长、评估了茎的直径和最终的小花数。变量以 5% 的错误概率进行方差分析和 Tukey 检验。灌溉提高了花茎的质量，茎和穗的长度增加，直径和每穗的小花数增加，从而使茎具有更大的装饰价值。用稻草覆盖的土壤不影响唐菖蒲花茎的质量参数，品种之间唯一观察到的差异是穗的长度可变。