Scarcity of good quality water is a limiting factor for irrigated agriculture, especially in a semi-arid region, which induces the use of waters with high salt levels to irrigate crops. As a result, it becomes necessary to use salt tolerant genotypes and appropriate cultivation strategies that enable their production. With this focus, this study was carried out to evaluate the production components of three naturally colored cotton genotypes (‘BRS Rubi’, ‘BRS Topázio’, and ‘BRS Safira’), subjected to various irrigation management strategies, varying the stages of development in which plants were irrigated with saline water. The study also aimed to evaluate the influence of the water salinity level at which seeds were formed, in a new production cycle, using the same irrigation strategies and varying the phenological stages. There were seven salinity management strategies in the first year of cultivation and ten in the second year, both experiments were conducted in a randomized block design. Among the genotypes, ‘BRS Rubi’ was the most tolerant to salinity, with respect to the intrinsic characteristics of the fiber, regardless of the development stage. In the second production cycle, plants grown from seeds formed under salt stress during the stages of flowering and yield formation had increases in lint weight and fiber quality. In the second year, the oil content of the cotton genotypes was not compromised by the cumulative salt stress, considering seeds produced in plants irrigated with saline water in the previous cycle.

中文翻译：

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天然彩棉两个生产周期的盐水灌溉策略

缺乏优质水是灌溉农业的一个限制因素，特别是在半干旱地区，这导致使用含盐量高的水来灌溉作物。因此，有必要使用耐盐基因型和适当的栽培策略来实现它们的生产。以此为重点，本研究旨在评估三种天然有色棉花基因型（“BRS Rubi”、“BRS Topázio”和“BRS Safira”）的生产成分，这些棉花受到各种灌溉管理策略、不同发育阶段的影响其中植物用盐水灌溉。该研究还旨在评估在新的生产周期中，使用相同的灌溉策略和改变物候阶段的水盐度水平对种子形成的影响。第一年有七种盐度管理策略，第二年有十种，这两个实验都是在随机区组设计中进行的。在基因型中，就纤维的内在特征而言，无论发育阶段如何，“BRS Rubi”对盐分的耐受性最强。在第二个生产周期中，从开花和产量形成阶段在盐胁迫下形成的种子生长的植物的皮棉重量和纤维质量有所增加。在第二年，棉花基因型的油含量没有受到累积盐胁迫的影响，考虑到在前一个周期用盐水灌溉的植物中产生的种子。在基因型中，就纤维的内在特征而言，无论发育阶段如何，“BRS Rubi”对盐分的耐受性最强。在第二个生产周期中，从开花和产量形成阶段在盐胁迫下形成的种子生长的植物的皮棉重量和纤维质量有所增加。在第二年，棉花基因型的油含量没有受到累积盐胁迫的影响，考虑到在前一个周期用盐水灌溉的植物中产生的种子。在基因型中，就纤维的内在特征而言，无论发育阶段如何，“BRS Rubi”对盐分的耐受性最强。在第二个生产周期中，从开花和产量形成阶段在盐胁迫下形成的种子生长的植物的皮棉重量和纤维质量有所增加。在第二年，棉花基因型的油含量没有受到累积盐胁迫的影响，考虑到在前一个周期用盐水灌溉的植物中产生的种子。从开花和产量形成阶段在盐胁迫下形成的种子生长的植物的皮棉重量和纤维质量有所增加。在第二年，棉花基因型的油含量没有受到累积盐胁迫的影响，考虑到在前一个周期用盐水灌溉的植物中产生的种子。从开花和产量形成阶段在盐胁迫下形成的种子生长的植物的皮棉重量和纤维质量有所增加。在第二年，棉花基因型的油含量没有受到累积盐胁迫的影响，考虑到在前一个周期用盐水灌溉的植物中产生的种子。