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Outline
In order to explore the impact of human activities on net phosphorus input in different ecological types in the agricultural-pastoral ecotone in northern China, the statistical data of 23 prefecture-level cities in 7 provinces involved in the northern agricultural-pastoral ecotone from 1985~2020 were collected based on the net phosphorus input model of human activities (NAPI), and the development trend of NAPI in the region was analyzed. The results show that the NAPI change in the northern agropastoral zone shows a downward trend as a whole, increasing due to fertilizer application and food intake in 1985~2015, and decreasing due to agricultural restructuring in 2015~2020, but Liaoning and Ningxia are inconsistent with the overall trend due to agricultural restructuring in only some areas; In terms of NAPI composition, phosphorus fertilizer input accounted for the highest proportion of NAPI, more than 50%, followed by food phosphorus, accounting for 30%~40%. In terms of influencing factors, NAPI was positively correlated with population density, cultivated land area, and livestock and poultry volume per unit area (P<0.001).Therefore, the adjustment of agricultural structure in the northern agricultural-pastoral ecotone has effectively reduced the net phosphorus input of human activities.
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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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