Cotton is a relatively new crop in southern Kansas and its effective irrigation scheduling requires information on crop water requirement and water productivity in a given climatic condition. This study aimed to: (1) assess cotton crop actual evapotranspiration, irrigation water requirement, (2) evaluate lint yield and quality, and (3) determine the water productivity related to total water (irrigation and rainfall), irrigation, and evapotranspiration under different irrigation technologies and rainfed conditions in semi-arid climate of western Kansas. Field experiments were conducted in 2020, 2021, and 2022 at the Southwest Research and Extension Center (SWREC) in Garden City, KS, to evaluate cotton production under four irrigation technologies which were low elevation spray application (LESA), low energy precision application (LEPA), mobile drip irrigation 1 (MDI1 with 3.79 L/h), mobile drip irrigation 2 (MDI2 with 7.57 L/h) and a rainfed treatment under a randomized complete block design with the variety PHY 205 W3FE. Crop management was similar across all treatments for three growing seasons. The results showed that the seasonal actual evapotranspiration (ETa) varied among the irrigation technologies, the rainfed treatment, and years. On average, LESA recorded the highest ETa value of 463.9 mm and LEPA had the lowest ETa value of 457.2 mm. The lint yield and lint quality (micronaire, length, strength, uniformity, color grade) varied significantly among the irrigation technologies and the rainfed setting. The highest lint yield of 1061.94 kg ha⁻¹ was obtained under LEPA, while the rainfed registered the lowest lint yield of 224.13 kg ha⁻¹. The irrigated cotton had a high value for lint quality parameters with the LEPA having the best lint quality. Furthermore, on average, LEPA recorded the highest evapotranspiration-water, total-water, and irrigation-water use efficiencies, and the values were 0.23, 0.33, and 0.39 kg m⁻³, respectively. The cotton ETa and water productivity are valuable parameters for effective irrigation scheduling for cotton production under similar climate and soil conditions.

棉花是堪萨斯州南部相对较新的作物，其有效的灌溉计划需要有关特定气候条件下作物需水量和水生产率的信息。本研究旨在：(1) 评估棉花作物的实际蒸散量、灌溉需水量，(2) 评估皮棉产量和质量，以及 (3) 确定与总水量（灌溉和降雨）、灌溉和蒸散量相关的水生产率堪萨斯州西部半干旱气候下的不同灌溉技术和雨养条件。2020 年、2021 年和 2022 年在堪萨斯州加登城西南研究和推广中心 (SWREC) 进行了田间试验，评估低海拔喷洒 (LESA)、低能精准施用 (LESA) 和低能量精准施用 (LESA) 四种灌溉技术下的棉花产量。 LEPA）、移动滴灌 1（MDI1，3.79 L/h）、移动滴灌 2（MDI2，7.57 L/h）以及采用 PHY 205 W3FE 品种的随机完整区组设计下的雨养处理。三个生长季节所有处理的作物管理相似。结果表明，季节性实际蒸散量（ETa）因灌溉技术、雨养处理和年份而异。平均而言，LESA 记录的 ETa 值最高，为 463.9 毫米，LEPA 记录的 ETa 值最低，为 457.2 毫米。不同灌溉技术和雨养环境下的皮棉产量和皮棉质量（马克隆值、长度、强度、均匀度、颜色等级）存在显着差异。LEPA 下的最高皮棉产量为 1061.94 kg ha ^-1，而雨养的皮棉产量最低为 224.13 kg ha ^-1。灌溉棉花的皮棉质量参数值很高，其中 LEPA 的皮棉质量最好。此外，平均而言，LEPA记录的蒸散量水、总水和灌溉水利用率最高，分别为0.23、0.33和0.39 kg m ^-3。棉花ETa和水分生产率是在相似气候和土壤条件下棉花生产有效灌溉调度的重要参数。