|
|
|
| The evaluation of soil conservation of forest ecosystem in China |
| Lu Shaowei1, Jin Fang1, Yu Xinxiao1, Xie Yuanyuan1, Li Yuanhui2, Wang Shusen1 |
| 1Key Laboratory of Soil and Water Conservation and Desertification Combating of the Ministry of Education, College of Soil and Water Conservation Beijing Forestry University; 100083, Beijing; 2Hebei Agricultural University, 071000, Baoding, Hebei: China |
|
|
|
|
Abstract The value of soil conservation of forest is the important part of environmental product value of the forest Aiming at economic value of soil conservation of forest in China, the value of reducing soil degradation, nutrient loss of soil and sediment deposition is calculated for Chinese forest ecosystem taking opportunity cost method, shade price method and substitution engineering method The results show that total value of reducing abandoned soil is 624140 million/a in China, total value of reducing loss of N, P and K of soil is 453 billion and 872400 million/a, total value of reducing sediment deposition is 1 billion and 37545 million/a and total value of reducing soil erosion is 455 billion and 872000 million/a The value order of protecting soil function in Chinese forest ecosystem is subtropical zone>tropical zone>warm temperate grasslands>cold temperate zone>temperate zone>temperate deserts>warm temperate zone >Tibetan Plateau zone The maximum quantity of soil conservation are 3 billion 287040 million t/a in subtropical zone, and the minimum quantity of soil conservation is 262145 million t/a in temperate desert.
|
|
Received: 10 December 2004
|
|
|
|
|
|
|
