Adaptive Plant Selecting In Yangquan 280 Coal Gangue Pile

Coal gangue easy to ignite and impact on environment espesilly for air, and it occupy a great deal of soil. Vegetation restoration is one of available approach for coal gangue pile fathering,the special soil condition of coal gangue pile such as high temperature,acidification, salinity etc. is the main limited factor for vegetation restoration.Due to this question the paper settle a study for adaptive plant selecting on the basis of investigation on soil condition and vegetation of 280 coal gangue pile which finished the earthen up project in 2005 in Shanxi Yangquan,this will establish some groundwoks of theory and for coal gangue pile fathering and vegetation restoration innation .The results of study as following:(1) The results of vegetation investigation shows that there are 83 kinds of plant and 17 kinds of it are growing spontaneousness,vegetation is not uniform distributing,most of it are herbage such as Setaria viridis L, Astragalus adsurgens Pall, Tribulus terrestris L etc. the arbor and shrub inverse proportion is small such as Platycladus orientalis, Ailanthus altissima, Vitex negundo,etc.of herbage for high temperature condition of coal gangue pile is better the arbor and shrub which root distribution is relatively deeper.(2) The soil temperature of soil laye(r0～50cm)in 280 coal gangue pile is higher than normal one for 4.6～18.2℃, the section temperature of soil layer is increasing with depth, it is not change obviously in normal one; soil moisture of soil layer is higher than mantlerock(50cm以下)and will little reduce along with deepness increasing, it is not change obviously in mantlerock; the pH is less than 5.5 in mantlerock of coal gangue pile, it is unfit for most of plant to grow, the pH of soil layer is normal; the salinity content of mantlerock of coal gangue pile is higher, it is belong to salty soil category and unfit for plant growth,but it is not salinited in soil layer.The result shows that the soil condition will not impact herbage and 1,2 years old arbor and shrub which have short roots,but it is disadvantage for adult arbor and shrub to growth.(3) The acidity and salinity of coal gangue and it's weathered products will reduce in evidence when commix with ocher in given proportion,and the survive rate of plant growing on the commixed soil is better.This offer an available approach for increasing thickness of soil which in favor of plant growth and save money for earthen up project.(4)We choose more than 30 kinds plant which growth status is better from 83 kinds plant in 280 coal gangue pile for adaptive plant select by high temperature stress experimentation,acid stress experimentation,soil moisture mensuration which plant growth demand. The result shows that some plant can stand with high temperature of soil such as Setaria viridis L, Portulaca oleracea L, Lotus corniculatus L, Astragalus adsurgens Pall, Amorpha fruticosa, Platycladus orientalis,Ailanthus altissima,etc,they can stand with temperature less than 46.8℃of soil,especially for Setaria viridis L, Portulaca oleracea L, can survive in soil which temperature is less than 53℃;some plant such as Portulaca oleracea L, Elaeagnus pungens, Parthenocissus tricuspidata,Forsythia suspensa, Platycladus orientalis,etc are relatively resist drought which the least moisture plant growth need are small; some plant such as Parthenocissus tricuspidata, Prunus armeniaca, Euonymus maackii,etc.have better survive rate and photosynthesis guide line in acid stress experimentation.