Abstract Water shortage is a major challenge for cotton production in Uzbekistan, substantially deteriorating crop growth and yield. Two-year field studies in a split-plot design were conducted at the experimental station of Cotton Research Institute located in Kashkadarya region, Uzbekistan to investigate the response of cotton to different chemical fertilization rates (N250P175K125 kg ha−1 and N200P140K100 kg ha−1) under two irrigation regimes (1-2-1 vs. 1-3-1). Results showed that the cotton plants grown under N250P175K125 kg ha−1 chemical fertilization in combination with 1-3-1 irrigation regime produced significantly higher biomass by 16.4% (3.55 Mg ha−1) and 19.1% (3.37 Mg ha−1), economic yield by 25.3% (3.61 Mg ha−1) and 25.9% (4.03 Mg ha−1) and lint yield by 20% (1.26 Mg ha−1) and 20.7% (1.26 Mg ha−1), respectively, in Iolotan-14 and Surkhan-14 cotton varieties than did the lower level of these treatments. Moreover, a combination of irrigation regime (1-3-1) plus chemical fertilization (N250P175K125 kg ha−1) was superior for fiber quality parameters under arid regions for both tested Gossipium barbadense varieties. Whereas, a total norm of the supplied water under 1-2-1 and 1-3-1 irrigation regimes were 4225.3 and 4148.3 m3 ha−1, showing the effectiveness of the 1-3-1 tested irrigation method. Modern water-saving technologies are important for pima cotton production of Uzbekistan with positive impacts on nutrition and water use efficiencies under arid harsh conditions.

中文翻译：

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提高乌兹别克斯坦干旱条件下皮马棉 (Gossypium barbadense L.) 品种的营养和水分利用效率

摘要 水资源短缺是乌兹别克斯坦棉花生产面临的主要挑战，严重影响了作物的生长和产量。在位于乌兹别克斯坦 Kashkadarya 地区的棉花研究所实验站进行了为期两年的裂区设计田间研究，以研究棉花对不同化学施肥量（N250P175K125 kg ha-1 和 N200P140K100 kg ha-1）的响应) 在两种灌溉制度下（1-2-1 与 1-3-1）。结果表明，在 N250P175K125 kg ha-1 化学施肥和 1-3-1 灌溉制度下生长的棉花植物产生了显着更高的生物量，分别为 16.4% (3.55 Mg ha-1) 和 19.1% (3.37 Mg ha-1)，经济产量分别提高了 25.3% (3.61 Mg ha-1) 和 25.9% (4.03 Mg ha-1)，皮棉产量分别提高了 20% (1.26 Mg ha-1) 和 20.7% (1.26 Mg ha-1)，在 Iolotan-14 和 Surkhan-14 棉花品种中，这些处理的水平低于较低水平。此外，灌溉制度 (1-3-1) 加化学施肥 (N250P175K125 kg ha-1) 的组合在干旱地区的纤维质量参数方面对两种测试的 Gossipium barbadense 品种均具有优势。而 1-2-1 和 1-3-1 灌溉制度下的供水总规范为 4225.3 和 4148.3 m3 ha-1，表明 1-3-1 测试灌溉方法的有效性。现代节水技术对于乌兹别克斯坦的皮马棉生产非常重要，对干旱恶劣条件下的营养和水资源利用效率产生积极影响。灌溉制度 (1-3-1) 加化学施肥 (N250P175K125 kg ha-1) 的组合在干旱地区对于两种测试的 Gossipium barbadense 品种的纤维质量参数均具有优势。而 1-2-1 和 1-3-1 灌溉制度下的供水总规范为 4225.3 和 4148.3 m3 ha-1，表明 1-3-1 测试灌溉方法的有效性。现代节水技术对乌兹别克斯坦的皮马棉生产非常重要，对干旱恶劣条件下的营养和水资源利用效率产生积极影响。灌溉制度 (1-3-1) 加化学施肥 (N250P175K125 kg ha-1) 的组合在干旱地区对于两种测试的 Gossipium barbadense 品种的纤维质量参数均具有优势。而 1-2-1 和 1-3-1 灌溉制度下的供水总规范为 4225.3 和 4148.3 m3 ha-1，表明 1-3-1 测试灌溉方法的有效性。现代节水技术对乌兹别克斯坦的皮马棉生产非常重要，对干旱恶劣条件下的营养和水资源利用效率产生积极影响。