Rational application of field-management technology can not only improve mango (Mangifera indica L.) fresh fruit yield and quality but also improve irrigation water use efficiency (IWUE). However, few studies have involved the simultaneous use of mulch and irrigation-management techniques in hot and dry environments to achieve a relatively good level of performance. We used the entropy weight method (EWM) to explore an optimal mulching and irrigation-management technology for mango production in a dry hot environment. Three irrigation levels [FI, 100% mango evapotranspiration (ET_C); DI₇₅, 75% ET_C; DI₅₀, 50% ET_C] were designed with (SM) and without (NM) sugarcane leaf mulching in 2018 and 2019 in a dry hot environment. The results showed that the photosynthetic rate, stomatal conductance, transpiration rate, leaf water-use efficiency, and carboxylation efficiency in the SM treatment were 12.5% to 83.7% higher than those in the NM treatment in both years. Compared with the NM treatment, the SM treatment increased the fresh fruit yield and IWUE by 45.7% and 49.7% in 2018 and by 46.1% and 63.2% in 2019. The solid-to-acid ratio and sugar-to-acid ratio in the SM treatment were 48.5% and 50.4% higher than those in the NM treatment, respectively, but the titratable acid content decreased by 31.3%. Compared with FI, DI₇₅ increased carotenoid content, total soluble solids, solid-to-acid ratio and sugar-to-acid ratio by 8.4%–40.7%, while it reduced titratable acid by 22.8%. Compared with FI, DI₅₀ reduced fresh fruit yield by 24.3% and 21.9% in 2018 and 2019, respectively, while it increased IWUE by 13.6% and 17.7%. The fresh fruit yield of SMDI₇₅ was the highest, which was 1.42 and 1.44 times that of NMFI in both years, respectively. A comprehensive evaluation by EWM also showed that the SMDI₅₀ treatment had the highest comprehensive scores of mango yield, quality and water-use efficiency, which could provide a basis for the scientific management of mango fertiliser in dry and hot areas of China.

合理应用田间管理技术，不仅可以提高芒果（Mangifera indica L.）鲜果产量和品质，还可以提高灌溉用水效率（IWUE）。然而，很少有研究涉及在炎热和干燥的环境中同时使用覆盖物和灌溉管理技术以实现相对良好的性能水平。我们使用熵权法 (EWM) 来探索干燥炎热环境下芒果生产的最佳覆盖和灌溉管理技术。三种灌溉水平 [FI, 100% 芒果蒸散量 (ET _C ); DI ₇₅ , 75% ET _C ; DI ₅₀ , 50% ET _C] 在 2018 年和 2019 年在干热环境中设计有 (SM) 和没有 (NM) 甘蔗叶覆盖。结果表明，SM处理的光合速率、气孔导度、蒸腾速率、叶片水分利用效率和羧化效率均比NM处理高12.5%～83.7%。与NM处理相比，SM处理使2018年鲜果产量和IWUE分别提高了45.7%和49.7%，2019年分别提高了46.1%和63.2%。 SM处理分别比NM处理高48.5%和50.4%，但可滴定酸含量降低了31.3%。与FI相比，DI ₇₅增加类胡萝卜素含量、总可溶性固形物、固酸比和糖酸比 8.4%–40.7%，而可滴定酸减少 22.8%。与FI相比，DI ₅₀在2018年和2019年分别降低了24.3%和21.9%的鲜果产量，同时增加了13.6%和17.7%的IWUE。SMDI _75的鲜果产量最高，分别是NMFI的1.42和1.44倍。EWM综合评价还表明，SMDI ₅₀处理在芒果产量、品质和水分利用效率综合得分最高，可为我国干热地区芒果施肥科学管理提供依据。