露天煤矿排土场植被调查与自然恢复研究(英文)

通过分析辽宁省海州露天煤矿排土场植被组成、物种多样性及重要值的变化,研究了排土场植物群落恢复与演替的一般规律。结果表明:排土场共有植物63 种,分属于23 科,其中菊科15 种、豆科11 种、禾本科8 种;蒺藜+水稗草+猪毛菜、水稗草+大籽蒿+黄蒿、水稗草+披硷草+黄蒿+大籽蒿+黄花草木犀、芦苇+披硷草+水稗草+狗尾草分别是年限为5、10、20、40 梯田层群落的优势种群;重要值对植被重建中物种筛选有指示性,蒺藜在排土场人工恢复中可做为先锋种,披硷草、芦苇、水稗草可做为重要的优势种;排土场植被自然恢复速度缓慢,为了尽快改善生态环境,应该筛选并合理配置先锋植物和适生植物,进行植被重建,加强抚育管理,缩短演替进程。表2 参17。

Natural vegetation recovery on waste dump in opencast coalmine area

The changes of vegetation compositions, plant species diversity, species important value and succession of plant community were studied on waste dumps in Haizhou opencast coalmine which is located in the west of Liaoning Province, China (41°41′–42°56′ N, 121°1′–122°56′E). Four kinds of terraces with different ages (5, 10, 20 and 40 years) were selected for investigation of plants. Total of 63 species of natural colonized plants were recorded on the waste dump and they belong to 23 families. The main families were Composiatae (15 species), Fabaceae (11 species) and Leguminosae (8 species), which accounted for 54.0% of total species and play an important role in natural vegetation recovery in waste dump area. The dominant species on 5-, 10-, 20-, 40-year-old terraces wereTribulus terrestris+Echinochloa hispidula+Salsola collina, Echinochloa hispidula+Artemisia sieversiana+Artemisia scoparia, Echinochloa hispidula+Clinelymus dahuricus+Artemisia scoparia+Artemisia sieversiana+Melilotus officinalis, Clinelymus dahuricus+Phragmites communis+ Echinochloa hispidula+Setaria viridis, respectively. According to the important value of species calculated. It is determined thatTribulus terrestris can act as pioneer species on waste dump andClinelymus dahuricus, Phragmites communis andEchinochloah hispidula are important dominant species in vegetation restoration in Haizhou opencast coalmine. The study results can provide scientific basis for selecting and disposing appropriately plant species and rehabilitating vegetation on waste dumps of coalmine. Foundation item: This study was supported by National Natural Science Foundation of China (70273050,30370281) and International Cooperation Project of Heilongjiang Provincial Key Technology Projects (WC04206) Biography: CHENG Jian-long (1976-), male, Ph. Doctor in Institute of Restoration Ecology, China University of Mining and Technology, Beijing 100083, P. R. China Responsible editor: Chai Ruihai