论文部分内容阅读
应用群落物种多样性特征值和生物量分析了福建海岸带不同防沙工程措施中沙地植被的两种恢复过程,即网格草地恢复:厚藤群落,鬣刺+海边月见草+海滨蟛蜞菊群落,鬣刺+厚藤+海滨蟛蜞菊群落;平台草地恢复:绢毛飘拂草+海边月见草+厚藤群落,丁葵草+厚藤+海滨蟛蜞菊群落,矮生苔草+绢毛飘拂草+马缨丹群落。生活型为匍匐草本或草质藤本的物种较其它生活型的物种能更好的适应海岸带沙地环境。两恢复过程中,植被的群落物种丰富度和多样性指数都表现为先增大后减小的n形变化趋势。在网格草地恢复中,网格设置与匍匐草本厚藤促进了物理环境的改善,并为后期定居者创造了较好的定居条件,而在平台草地恢复初期,化学材料与黏土混和平台的设置提高了下垫面稳定性,使近缘防护林内的草地物种得以成功定居和繁殖。海岸防沙工程为先锋种的定居提供了优越的下垫面条件,促进了组成的多元化和结构的复杂化,使土壤有机质和全氮含量增加,pH值明显降低,并对海岸带沙地植被生物量的积累起到了促进作用,因此采用工程方式恢复海岸带沙地植被,对于海岸带退化生态系统的恢复有着重要意义。
Based on the eigenvalue and biomass of community species diversity, two restoration processes of sandy vegetation in different sand control measures of Fujian coast were analyzed, that is, restoration of grid grassland: thick vine community, seaweed + sea evening primrose + sea buckthorn Community, hyena + thickened vine + seashore Wollastonia community; platform grassland restoration: sericulture floss grass + seaside evening primrose + thick vine community, tachyglus + thick vines + seashore Wollastonia community, short moss grass + + Lantana community. Living-type creeping herbs or rattan species better than other living species can adapt to the coastal sand sandy environment. During the two restoration processes, the species richness and diversity index of vegetation communities showed the trend of n-shape firstly increasing and then decreasing. In grid grassland restoration, the setting of grids and the growth of the prostrate herb thickened rattan improved the physical environment and created better settlements for later settlers. However, in the early stage of grassland restoration, the setting of the mixing platform of chemical materials and clay The stability of the underlying surface is improved, and the grass species in the shelter forest can be successfully settled and multiplied. Coastal sand control project provides pioneering species settlement superior ground conditions, and promote the composition of the diversification and structural complexity, so that soil organic matter and total nitrogen content increased significantly lower pH, and on the coast of sand The accumulation of vegetation biomass has played a catalytic role, so the use of engineering methods to restore coastal sandy land vegetation is of great significance for the restoration of degraded coastal ecosystems.