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Salt damage is a common factor that hinders the normal growth of plants in agriculture. The southern end of Guangxi has a long coastline facing the South China Sea. Bananas are widely planted on the coastline. Seawater is often poured into the land, causing high concentrations of salt stress. Every year from August to September is the high-incidence period of typhoons. The water vapor formed from the South China Sea enters the inland with the typhoon, which will cause low-concentration salt stress. In this paper, taking Pisang Awak as the research material, the nutrient elements and soil components of each part of the Pisang Awak plant under salt stress were measured, the absorption and distribution characteristics of the elements were studied, and the mechanism of salt tolerance was analyzed. The results showed that: when the salt concentration of soil was 0.01%, the nutrient element content of each part was not significantly different from that of the control; when the salt concentration was greater than 0.01%, with the increase of the salt concentration, the total nitrogen, total phosphorus, total potassium, total magnesium and total calcium showed a decreasing trend, indicating that the higher concentration of salt stress reduced the ability of Pisang Awak to absorb nutrients from the soil, but the total magnesium and total calcium content of leaves decreased more slowly than those of other parts, and the proportion of the decline was lower. It was also lower than those of other parts, indicating that the leaves might have the ability to selectively absorb Ca2+ and Mg2+; when the salt concentration was greater than 0.01%, the Cl and Na contents of roots and pseudostems increased rapidly, and the increase speed and amplitude were much greater than those of leaves and bulbs. Therefore, it is believed that the mechanism of salt tolerance of Pisang Awak is that more Cl and Na were stored in the root and that Cl and Na were absorbed by the stem during the transportation to the leaves. When the salt concentration was greater than 0.2%, the contents of alkaline hydrolyzable nitrogen, available phosphorus and available potassium in the soil showed a decreasing trend, indicating that the high concentration of salt hindered the flow of mineral ions in the soil to the root surface. The research results could provide a data basis for the changes of elements in various parts of Guangxi Pisang Awak and the changes of soil components when they are subjected to seawater inversion and typhoon weather.
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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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