Foliar spray of growth promoters significantly ameliorated the harmful effects of environmental warming and nutrient deficiency on growth, development and yield of major field crops. So, the current experiment was carried out to evaluate the potential effects of five growth promoting substances, including Moringa leaf extract, Polydol, Multisol, Classic and Asahi star along with water and no spray on growth indices, dry matter assimilation, seed cotton yield and related traits as well as chlorophyll scores of cotton var. MNH-886 under a semi-arid environment of Pakistan. On average bases, the results indicate that exogenous spray of growth promoters enhanced leaf area index by 20.0–26.0%, growth rate by 15.0–21.0%, dry matter partitioning by 15.0–21.0%, sympodial branches by 22.0–33.0%, harvested bolls by 46.0–48.0%, boll weight by 28.0–30.0% and total chlorophyll contents by 15.0–25.0% relative to control treatment. Due to improved morphological and yield contributing traits, the exogenous spray of promoters also increased the seed cotton yield by 21.0–33.0% and net benefit by 50.0–68.0% as compared to control. In conclusion, the MLE, being a cheaper source, could ameliorate the damages imposed by environmental warming and nutrient deficiency, leading to high cotton productivity. The farmers across the world can get high yield of cotton by foliar spray of MLE.

叶面喷施生长促进剂显着改善了环境变暖和养分缺乏对主要大田作物生长、发育和产量的有害影响。因此，本实验旨在评估包括辣木叶提取物、Polydol、Multisol、Classic 和 Asahi star 在内的五种促生长物质与水和不喷洒对生长指数、干物质同化、籽棉产量和棉花变种的相关性状以及叶绿素评分。巴基斯坦半干旱环境下的 MNH-886。结果表明，外源喷施生长促进剂使叶面积指数提高20.0-26.0%，生长率提高15.0-21.0%，干物质分配提高15.0-21.0%，合生枝提高22.0-33.0%，收获棉铃46.0-48.0%，棉铃重量 28.0-30。0% 和总叶绿素含量相对于对照处理 15.0-25.0%。由于形态和产量贡献性状的改善，与对照相比，外源喷洒促进剂也使籽棉产量增加了 21.0-33.0%，净收益增加了 50.0-68.0%。总之，作为更便宜的来源，MLE 可以减轻环境变暖和营养缺乏造成的损害，从而提高棉花生产力。世界各地的农民都可以通过叶面喷洒 MLE 获得高产棉花。可以减轻环境变暖和营养缺乏造成的损害，从而提高棉花生产力。世界各地的农民都可以通过叶面喷洒 MLE 获得高产棉花。可以减轻环境变暖和营养缺乏造成的损害，从而提高棉花生产力。世界各地的农民都可以通过叶面喷洒 MLE 获得高产棉花。