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In order to explore a method to protect Orah from frost damage, Orah harvested early from 2021—2022 were used as the materials, and prochloraz+ambient temperature storage and CK + ambient temperature storage were used to determine the sugar, acid, vitamin C and other quality indicators, as well as the weight loss, decay, electrical conductivity and other storage resistance indicators during the storage period. SPSS analysis software was used to cluster seven indicators in two years. The results showed that prochloraz could effectively inhibit the growth of the rot pathogen of citrus during storage, and prolong the occurrence time of fruit rot; At the same time, it could maintain the content of soluble solids in fruits to the level before harvest. During the 150 d storage period, the titratable acid content of the two treatments decreased gradually with the extension of storage time. The titratable acid content in prochloraz treatment group decreased faster than that in CK. Therefore, the solid acid ratio of prochloraz treatment group was higher than that of CK. As the solid acid ratio increased with the increase of storage time, the flavor quality of the two treatments also gradually improved. During the storage period, there was no significant difference in vitamin C content between the two; At 150 days of storage, it could still be maintained at about 20.90 mg/100 g (2021) and 14.50 mg/100 g (2022). In terms of fruit storage resistance, the weight loss rate of prochloraz treatment group was slightly lower than that of the CK in 2022 (prochloraz was significantly lower than that of the CK in 2021); On the contrary, the peel conductivity of prochloraz treatment group was higher than that of the CK in 2022 (in 2021, prochloraz treatment was significantly higher than that of the CK). The seven indexes of the two treatments in two years were clustered into two categories by the cluster analysis. The first category were CK of 0, 15, 30, 45, 60, 90 d and prochloraz treatments of 0, 15, 30, 45, 60 d; The second category were CK of 120, 150 d and prochloraz treatments of 90, 120, 150 d. To sum up, prochloraz can effectively reduce the occurrence of rot rate of Orah, improve the fruit flavor of early fruit picking, and maintain good total soluble solids and vitamin C content of fruits. According to the comprehensive indicators and cluster analysis results, the orah can be harvested early, treated with prochloraz and other preservatives, and stored at ambient temperature for 60 days or 60 days before being refrigerated, or stored at ambient temperature for 90 days before being released from the market.
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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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