|
|
|
| Effects of different vegetation restoration patterns in Gangue Pile on soil erosion and nutrient loss |
| Wang Liyan1，Zhang Chengliang2, Han Youzhi1, Pei Zongyang1 |
| 1. Foresty College,Shanxi Agricutural University, 030801 , Taigu, Shanxi ；2. College of Soil and Water Conservation, Beijing Foresty University, 100083, Beijing： China |
|
|
|
|
Abstract To solve the serious problem of soil erosion in the gangue pile land, seven types of vegetation restoration were selected from the slope surface of 280 coal-gangue piles belonging to the No. 3 Shanxi Yangquan coal group. The bare land was taken as control. We observe the effects of different vegetation restoration patterns on soil erosion and nutrient loss on the erosion experiment plots set in the study area. The results showed that compared with the bare land, all restoration patterns played positive effect in the control of soil erosion and nutrient loss in the gangue pile land. The effects of mixed tree and shrub in the downhill section were better than those of the herbs and shrubs. In the uphill sections, the order of the effects in the reduction of soil erosion were given as follows ：Vitex negundo > Medicago > Sativa > Astraga- lus adsurgens > Melilotus suaveolens Ledeb，while in the downward slope, there were not significant differ-ence among mixed plantation of Robinia pseudoacacia L and Caragana intermedia，mixed plantation of Caragana korshinskii and Robinia pseudoacacia，mixed plantation of Vitex negundo, Ulmus pumila and Amorpha fruticosa. By parital correlation analysis, the effects of restoration on nutrient losses were ex-pressed as tha amount of eroded soil > runoff > slope degree > the length of slope. Different restoration pattern also have significant effects on available nutrient content of weathered gangue pile.
|
|
Received: 02 December 2010
|
|
|
|
|
|
|
