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The study was aimed to explore the effects of reducing chemical fertilizer application combined with microbial fertilizer on the quality of cempedak [Artocarpus champeden (Lour.) Spreng.] and soil nutrients. 7-year-old Duoyi No.1 cempedak was used as the material and 6 treatments, 100% compound fertilizer treatment (CK, 2 kg), 20% reduction in compound fertilizer + 20% microbial fertilizer (T1), 40% reduction in compound fertilizer + 40% microbial fertilizer (T2), 60% reduction in compound fertilizer + 60% microbial fertilizer (T3), 80% reduction in compound fertilizer + 80% microbial fertilizer (T4), and 100% microbial fertilizer treatment (T5, 5 kg) were set up. The effects of different fertilization treatments on cempedak quality, the effects of soil nutrients, and the correlation between cempedak quality index and soil nutrient index were analyzed. Compared with CK and T5 treatments, other treatments increased the fruit weight, edible rate, single aril pit weight, single aril weight, and soluble solids content of cempedak, reduced the fruit wall thickness. The T3 and T4 treatments significantly increased the single fruit weight and single aril weight of cempedak. The combined application of microbial fertilizer had a certain promoting effect on soil nutrients. The T4 treatment significantly enhanced soil total nitrogen, available phosphorus, available potassium, organic matter, and pH, while also increasing the levels of six metal elements in the soil: Ca, Mg, Fe, Mn, Cu, and Zn. The T3 treatment was second only to T4 treatment. Correlation analysis showed that the combined application of microbial fertilizer improved the single fruit weight and single aril weight of cempedak mainly by increasing available phosphorus, available potassium, Fe and Mn in the soil. In conclusion, the treatments of T3 and T4 not only improved the yield and quality of cempedak, but also improved the soil environment and ecological benefits, which are the optimal combined application modes for green and efficient cultivation of cempedak.
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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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