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The study of classified water price can provide scientific basis for the rational formulation of agricultural water price, which is of great significance for guaranteeing the benign operation of irrigated areas and promoting the high quality development of regional agriculture. Taking grain and oil crops as the research object, two evaluation indexes of irrigation benefit apportionment coefficient and irrigation water output were selected to define the irrigation benefit apportionment coefficient by emergy theory. The agricultural water price share evaluation system of different crops was constructed based on entropy weight method, and the irrigation classified water price evaluation model was established and applied in Baojixia irrigation district of Xianyang City. The results show that the share coefficient of irrigation benefit was 0.42, the share of agricultural water price of grain and oil crops was 0.37, and that of cash crops was 0.63. For agricultural water supply at full cost, the agricultural water price of grain and oil crops was 0.485 yuan/m3, and that of cash crops was 0.827 yuan/m3. As for the water price of agricultural water supply operation cost, the agricultural water price of grain and oil crops was 0.377 yuan/m3, and that of cash crops was 0.641 yuan/m3.
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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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