【摘要】 菌根真菌可以与陆地上80%以上的植物形成菌根共生体,促进植物在逆境的生长。采煤沉陷地在人工接种菌根真菌后复垦植被种群进行了自我修复与演变,监测采煤沉陷地复垦植物人工接种菌根真菌复垦后4 a对植被种群的自我演变规律影响。以神东矿区大柳塔采煤沉陷地人工林樟子松、沙棘和文冠果为研究对象,野外原位监测植被种类、生活型组成及植被多样性指数,并利用地统计学方法进行克里金插值,对比接种菌根真菌4 a后(+M)与同期种植的自然状态下(CK),两种处理样地内植被种类、数量及其多样性指标,揭示不同人工林在自然状态和人工接种4 a后,区域内物种个体种类、数量和群落多样性差异。研究结果表明:接菌提高樟子松人工林灌木层物种多样性,而降低草本层物种多样性;接菌提高沙棘和文冠果人工林的草本植物群落稳定性和物种多样性及其均匀度,抑制灌木层物种多样性增加。3种人工林微生物复垦4 a后多年生草本占优势地位。接菌组进入多年生草本+灌木的生态组成结构阶段,而对照组则相对滞后,处于一年生草本+多年生草本+灌木的组成结构阶段,接菌促进了生态的演变进程。综合分析植物分布特征,发现植物的最优拟合模型以高斯模型居多,阿尔泰狗娃花、地肤、猪毛蒿、白花草木樨、牛心朴子、野樱桃、油蒿及柠条的预测值精度较好。接菌可促进地稍瓜、阿尔泰狗娃花、牛心朴子、达乌里胡枝子和柠条频度和数量的增加,可能使绳虫实、糙隐子草、苦苣菜和花棒的频度和数量下降。本文为煤矿沉陷区采用微生物修复人工林促进生态群落自我演变进程奠定了初步的研究基础。更多还原

【Abstract】 Mycorrhizal fungi can form mycorrhizal symbiote with more than 80% of the plants on land,which is beneficial to the growth of plants in adversity.In order to explore the self-evolution law of reclaimed vegetation population after the artificial inoculation of mycorrhizal fungi in coal mining subsidence,the experiment of artificial inoculation of mycorrhizal fungi is carried out on the reclaimed plants of coal mining subsidence.Pinus sylvestris var.mongolica Litv,Hippophaer hamnoides and Xanthoceras sorbifolia Bunge are the research object in Shendong coal mining subsidence.The species,life type composition and vegetation diversity index of vegetation were monitored by field in-situ monito-ring method.The kriging interpolation was carried out by geostatistics method to obtain the difference of the vegetation species number and diversity index between the inoculation with mycorrhizal fungi after four years and the same period grown under natural conditions.The plantations can make a difference on the individual species,quality and community diversity of other species in the region between the two conditions.The results show that the species diversity of shrub layer in Pinus sylvestris var.mongolica Litv plantation that inoculated with mycorrhizal fungi is bigger than the natural condition.The species diversity of herb layer in Pinus sylvestris var.mongolica Litv plantation that inoculated with mycorrhizal fungi is smaller than the natural condition.The species diversity of shrub layer in Hippophaer hamnoides and Xanthoceras sorbifolia Bunge plantation that inoculated with AM fungi is smaller than the natural condition.The species diversity of herb layer in Hippophaer hamnoides and Xanthoceras sorbifolia Bunge plantation that inoculated with AM fungi is bigger than the natural condition.The perennial herb took over the dominant position in three planted forests.The sites that inoculated with mycorrhizal fungi is on the perennial herb +shrubsstage,while the natural sites is oneyear herb+perennial herb+shrubswhich,which is relatively lagged.The comprehensive analysis of the characteristics of plant distribution found that the best fitting model of plants is Gauss model.In terms of predictive value accuracy,Heteropappus hispidus(Thunb.) Less,Cynanchum thesiodes(Freyn).K.Schum,Artemisia scoparia Waldst.et Kit,Melilotus albus Medic.ex Desr,Cynanchum hancockianum(Maxim.) Al.Iljinski,Caragana intermedia,Artemisiaordosica,Caragana intermediaa and Cornus chinensis Wanger are better than others.Inoculated with mycorrhizal fungi can increase the frequency and quality of Cynanchum thesiodes(Freyn). K. Schum,Heteropappus hispidus(Thunb.) Less,Cynanchum hancockianum(Maxim.) Al. Iljinski,Lespedeza davurica and Caragana intermedia. The frequency and quality of Corispermum declinatum,Cleistogenes squarrosa(Trin.) Keng,Sonchus oleraceus L.and Hedysarum scoparium will decrease because of inoculating with mycorrhizal fungi.The study provides an important basis on revealing the ecological self-succession after artificial plantation by micro-reclamation.更多还原