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Objective To prepare cultivated soil standard material for agricultural soil testing process to ensure that the test process is closer to the actual test samples. Methods The candidate samples prepared by drying, crushing, grinding, mixing, packing, using the$F$test uniformity test, examined the long-term stability of the candidate in storage for more than 18 months and short-term stability of simulated transportation conditions, invited 10 long undertake the soil standard material value laboratory cooperation value, using a variety of test methods and the current advanced and reliable test methods, copper and nickel test, the sample with the average as the specified value, the final synthesis uncertainty. Results Developed by soil composition analysis standard material uniformity is good, for 18 months of stability monitoring, through the calculation evaluation for 5 years, the fixed value project comprehensive accurate, reasonable uncertainty assessment, the relative extension of copper uncertainty is${6.5}\%$, the relative uncertainty of total nickel is${6.7}\%$, better than similar concentration of other same grade of soil national standard material. Conclusion The standard material is widely used and can be used for soil composition analysis in agriculture, forestry, environment and geochemistry.
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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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