Bent branches are commonly utilized in cut roses to enhance commercial flower quality through increased nutrient production and biomass. However, the ideal number of bent branches concerning crop water productivity remains unknown. The experiment was conducted in Jinning, Yunnan, in 2022 with total of three growth periods with 1–3 bent branches. Sap flow of a commercial branch was measured using the heat ratio method to assess rose transpiration and crop water productivity during each growth period. Across three harvests, cut roses with three bent branches increased plant height by 87.9% compared to those with one bent branch (217 cm). The Fresh weight of cut roses with three bent branches was 63.6 g shoot, 135% more than with one bent branch. The roses with three branches produced 56% more high-grade (grade A and grade B) shoots than in other treatments. Daily transpiration in roses with three bent branches was 4.09 mm d across three harvests, which was 115% higher than in one bent branch. The economic value in three bent branches was 54% higher than in two bent branches and 120% higher than in one bent branch. Crop water productivity in three bent branches across three periods was 14.7 kg m, which was 84.7% higher than in two bent branches and 167% than in one bent branch. Our results help farmers to optimize irrigation of cut rose in greenhouse conditions and could be used in improving rose models by quantifying transpiration at crop level.

中文翻译：

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优化弯曲枝条数量可提高温室切花玫瑰 (Rosa Hyda) 的蒸腾作用和作物水分生产率

弯曲的枝条通常用于切花玫瑰，通过增加养分产量和生物量来提高商业花卉的质量。然而，与作物水分生产力相关的理想弯曲枝条数量仍然未知。试验于2022年在云南晋宁进行，共3个生育期，1~3个弯曲枝条。使用热比法测量商业枝条的液流，以评估玫瑰在每个生长期间的蒸腾作用和作物水分生产力。在三个收获期中，与具有 1 个弯曲枝条（217 厘米）的切花玫瑰相比，具有 3 个弯曲枝条的切花玫瑰株高增加了 87.9%。三弯枝月季切花鲜重为63.6克，比一弯枝玫瑰鲜重增加135%。三枝玫瑰比其他处理多产生 56% 的高级（A 级和 B 级）芽。具有三个弯曲枝条的玫瑰在三个收获期中的日蒸腾量为 4.09 毫米·天，比具有一个弯曲枝条的玫瑰高 115%。三弯枝的经济价值比二弯枝高出54%，比一弯枝高出120%。三个时期三弯枝作物水分生产力为14.7 kg·m，比二弯枝高84.7%，比一弯枝高167%。我们的结果帮助农民优化温室条件下切花玫瑰的灌溉，并可通过量化作物水平的蒸腾作用来改进玫瑰模型。