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The effects of spraying different combinations of plant growth regulators and foliar fertilizers at the appropriate fruit-setting time on the fruit expansion and quality of seedless fruits of Tainong No.1 mango were studied to provide a scientific basis for the high-quality and high-yield cultivation techniques of seedless fruits of Tainong No.1 mango, and to offer a reference for the scientific application of fertilizers for the expansion of seedless fruits of other small-and medium-sized mangoes. From 2022 to 2024, the seedless fruits of Tainong No.1 mango were used and four foliar spraying treatment schemes were set up, the control group (CK) with foliar fertilizer, T1 treatment with gibberellic acid + foliar fertilizer, T2 treatment with gibberellic acid + plant growth regulator + foliar fertilizer, and T3 treatment with compound plant growth regulator product + foliar fertilizer. The growth and development and fruit quality indicators of the seedless fruits were measured and analyzed. The results showed that when the fruits were 6-10 mm in size, spraying gibberellic acid + plant growth regulator + foliar fertilizer four times, the single-fruit weight of green fruits in T1 and T3 treatments was greater than 100 g, while the average single-fruit weight of green fruits in CK was 67.55 g, and the fruit-expanding effect was obvious. Among them, the average single-fruit weight of green fruits in T3 treatment increased by 98.98% compared with CK. T1 and T3 treatments significantly increased the calcium content. T1 and T3 treatments significantly decreased the average density, weight loss rate, total acid content, and vitamin C content of green fruits. T1 and T3 treatments had no significant effect on the fruit shape index. T2 treatment significantly decreased the soluble solid content, while T1 and T3 treatments had no significant effect on the soluble solid content. T1 and T3 treatments significantly increased the solid-acid ratio. Among them, T1 treatment significantly increased the solid-acid ratio, which was 45.34% higher than CK, and T2 treatment had no significant effect on the solid-acid ratio. T1 and T3 treatments significantly increased the magnesium content, while T2 treatment had no significant effect on the magnesium content. T1 and T2 treatments significantly decreased the potassium content, while T3 treatment had no significant effect on the potassium content. No residues of the used plant growth regulators were detected in the fruits. 1 mango in each treatment. Comprehensive score of the fruit quality of the fruits revealed the fruit quality of T1 treatment was the best, followed by T3 treatment. However, the single-fruit weight of T1 treatment after full ripening was less than 100 g, which could not fully meet the market's requirement for single-fruit weight. The fertilizer combination of T3 treatment is recommended for the production of seedless fruits of Tainong No.1 mango.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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