Reasonable fertilization is of great significance for increasing the yield of oil-tea Camellia, and the application of bio-organic fertilizers is superior to the current practice of using farm manure as the main fertilizer for oil-tea Camellia in many aspects. In order to develop and value the specialized bio-organic fertilizers suitable for the soil conditions of oil-tea Camellia plantations in tropical regions, the nutrient contents of oil-tea Camellia leaves, the physical and chemical properties, and enzyme activities of oil-tea Camellia forest soil were determined. The results showed that the application of bio-organic fertilizers and conventional compound fertilizer could significantly increase the water content, relative chlorophyll content (SPAD value), and nutrient elements of oil-tea Camellia leaves. The soil moisture contents and field capacities of different fertilization treatments were higher than those without fertilization, but there were no significant differences in soil bulk density and porosity between the treatments and the control group. All four types of bio-organic fertilizers could increase the contents of soil organic matter, alkaline nitrogen, available phosphorus, available potassium, and soil enzyme activity in different soil layers. T1 and T4 bio-organic fertilizer improved the chemical properties of oil-tea Camellia soil more, which is of great significance for the targeted improvement of the fertility and available potassium content of Hainan oil-tea Camellia forest land. The results would provide data for screening specialized bio-organic fertilizers suitable for tropical oil-tea Camellia, laying a scientific foundation for the subsequent large-scale application of bio-organic fertilizers for tropical oil-tea Camellia.
| 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 |