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Physicochemical reclamation of saline soils using coal powder
Raychev T.,Popandova S.,J???3zefaciuk G.,Hajnos M.
International Agrophysics , 2001,
Abstract: A new method of saline soils reclamation using coal powder was proposed and tested in practice in pot experiments on Halaquept soil with alfalfa as a testing plant. The experiment showed the possible applicability of the method in practice.
Soil bacteria and their biochemical characteristics on reclamation of coal mines
矿山复垦区土壤微生物及其生化特性研究

HONG Jian-Ping,
洪坚平

生态学报 , 2000,
Abstract: A serires of soil bacteria and their biochemical characteristics was studied on coal gangue hills by reclamation measurements.The results show that:all bacteria population and biochemical activity,genus of actinomyces and fungi,and soil nutrients on covered area with soil were better than those on coal gangue hills without soil cover.Above indexes on legume areas were better than those of grass family areas with the same soil cover.But a variety of thick soil layers from 10 to 20 cm did not show significant different in soil nutrients,physiological bacteria and their activities.Planting legume on thin soil covered\|coal gangue hills is a fast and effective measurement for reclamation of coal mining region.
Nvestigation of Some Physicochemical and Microbial Succession Parameters of Palm Wine
I.N. Nwachukwu,V.I. Ibekwe,B.N. Anyanwu
Journal of Food Technology , 2013,
Abstract: The microbial successions, based on some physicochemical parameters of palmwines from Eastern Nigeria during storage were investigated. The wines were investigated when fresh, at 36, 72, 480 and 600 h. The physicochemical parameters investigated included PH, titrable acidity, soluble solids, percentage moisture, reducing sugar and alcohol contents. The microbial investigation included total aerobic and anaerobic bacterial count, total yeast counts, identification of bacteria and yeast present and their successions. A total of 13 genera of bacteria and 8 species of yeasts were isolated and identified. Significant variations were observed in the physicochemical succession parameters during storage (p<0.05).
Primary and secondary succession on wooded peat-bogs
Robert Neuh?usl
Acta Societatis Botanicorum Poloniae , 1992, DOI: 10.5586/1160
Abstract: Study of primary and secondary succession on wooded peat- bogs are presented. Research has been done on a complex of mountain peat-bogs in the Bohemian Moravian Highland (Czechoslovakia). Natural succession series began with reed sedge and reed stands and terminated with Viccinio uliginosi-Pinetum, Calamagrostio villosae-Piceatum and Alnion glutinosae uder oligotrophic, oligo-mesotrophic and meso-eutrophic conditions, respectively. In marginal parts of peat-bogs (lagg) sedge fens are followed by birch cart. Open pine stands (Pino rotundatae-Sphagnetum) is submitted to cyclic succesion. The secondary succession may begin with the Sphagnum cuspidatum, Eriophorum angustifolium or Carex rostrata, and Carex rostrata stages, depending on trophic conditions of water. The final stage is usually Vaccinio uliginosi-Pinetum or Pino rotundatae-Spagnetum. Secondary succession pattern is influenced both by eutrophication and peat-land drainage.
Microbial Succession And Biochemical Aspects Of Mandai Fermentation At Low Salt Concentration.
Hasrul Satria Nur
Makara Seri Sains , 2009,
Abstract: Mandai isfermented food that traditionally made from the flesh of jack fruit (Arthocarphus champeden Spreg.). Usually mandai ismade as high salt concentration. However, the objective of this research is to study the succession and biochemicalaspects of microbials during fermentation at low salt concentration (10% w/v) for 14 days. During the period offermentation microbial cell numbers and biochemical aspects were observed at the 3rd, 5th, 7th and 14th day. Total cellnumber of bacteria and yeast were measured by pour plate method. The measurement was also conducted on fleshbefore incubation. The biochemical aspect observation included the contents of reducing sugar, N-total, salt, and pH.The research results indicated that the pattern of microbial succession occurred the fermentation. Yeast cells grewdominantly (2.8 x 109 CFU/g) on the 5th day fermentation but bacteria were dominant at the end (1.1 x 107 CFU/g). Thehighest decrease of reducing sugar and N-total contents were 0.240% at the 14th day and 0.159% at the 5th day,respectively. However, salt concentration was relatively stable and pH was varied within the range of 3.71-6.12 for thewhole period fermentation.
Dynamics and trajectories of secondary succession in Central Amazonia  [PDF]
Paulo Eduardo dos Santos Massoca,Ana Catarina Conte Jakovac,Tony Vizcarra Bentos,Garry Bruce Williamson
Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais , 2013,
Abstract: Land use history is a primary driver of secondary succession in the Central Amazon, resulting in the establishment of distinct trajectories differing in structure, composition, biomass and dynamics. Intensive use with prescribed fire to maintain pastures compromises the regenerative potential of land which, once abandoned, is colonized by few species and dominated by the genus Vismia, resulting in secondary forests that are depauperate in richness and stalled in succession. Where land use has been less intensive, a more diverse vegetation, dominated by the genus Cecropia colonizes, fostering relatively rapid plant succession. Based on knowledge acquired over two decades of study, we present here practical aspects related to the management of secondary succession for the restoration of environmental services in an economical and sustainable way with potential to reduce deforestation in the region. To manage the canopy and enrich secondary forests is technologically viable and economically feasible in secondary forests dominated by Cecropia, but forests dominated by Vismia will require alternative, more intrusive management practices. Finally, we discuss research projects currently underway at the Pioneers Project, the investigation of successional trajectories in second growth across distinct regions of the Amazon and the potential effects of climatic change on secondary formations and successional pathways.
PERFORMANCE OF TREE SPECIES USED ON THE RECLAMATION OF DEGRADED LANDS
Patrícia Aparecida de Souza,Nelson Venturin,Renato Luiz Grisi de Macedo,Maria Inês Nogueira Alvarenga
CERNE , 2001,
Abstract: This study was carried out on the margins of the Rio Grande at Monte Alegre Farm, in Ribeir o Vermelho county, Minas Gerais State, Brazil. The purpose of the study was to test 12 tree species for reclamation of an area degraded by the extraction of river bed sand. The experiment used 3,0 x 1,5 m spacing fo r testing 12 species distributed in a quinconx system. Soil fertilization varied inP leveles (100, 200, and 400g P/plant), chosen after soil chemical analyses. The source was simple super-phosphate. The statical design was randon blocks with a 12 x 3 design (12 species x 3 fertilizer levels), with a total of 36 treatments and 3 repetitions. The experiment contained 108 sample units. The interation species-fertilizer was not significant using treatment means. Two years after planting, the following was concluded: the degraded area is recovering, and the species are growing following the secondary succession pioneer, light-demanding climax and shade-tolerant species; preliminary observations indicated as most promising species Acacia mangium and Schinus terebinthifolius (survivorship in the field), Acacia mangium, (mean diameter at the ground level); and Schinus terebinthifolius, (crown area). These two species are thus recomended for the reclamation of areas degraded by extraction of river bed sand.
Spatio-temporal variations in soil moisture and physicochemical properties of a typical semiarid sand-meadow-desert landscape as influenced by land use
L. Duan, T. Liu, X. Wang, G. Wang, L. Ma,Y. Luo
Hydrology and Earth System Sciences (HESS) & Discussions (HESSD) , 2011,
Abstract: A good understanding of the interrelations between land cover alteration and changes in hydrologic conditions (e.g., soil moisture) as well as soil physicochemical properties (e.g., fine soil particles and nutrients) is crucial for maintaining the fragile hydrologic and environmental conditions of semiarid land, such as the Horqin Sandy Land in China, but is lacking in existing literature. The objectives of this study were to examine: (1) spatio-temporal variations of soil moisture and physicochemical properties in semiarid land; and (2) how those variations are influenced by land cover alteration. Using the data collected in a 9.71 km2 well-instrumented area of the Horqin Sandy Land, this study examined by visual examination and statistical analyses the spatio-temporal variations of soil moisture and physicochemical properties. The results indicated that for the study area, the soil moisture and physicochemical properties were dependent on local topography, soil texture, vegetation density, and human activity. Long-term reclamation for agriculture was found to reduce soil moisture by over 23 % and significantly (p-value < 0.05) lower the contents of soil organic matter, fine soil particles, and nutrients.
The pattern of seed banks during secondary succession on poor soils
Anna J. Kwiatkowska-Falińska,Ma?gorzata Jankowska-B?aszczuk,Maciej Wódkiewicz
Acta Societatis Botanicorum Poloniae , 2011, DOI: 10.5586/asbp.2011.040
Abstract: Studies on the soil seed banks of fallow lands of different ages were carried out on poor soil abandoned fields and in a fresh coniferous forest in north-eastern Poland. The size and diversity of seed banks was studied with the seedling emergence method. Species abundance (i), density (ii), number of species from different biological groups (iii) and distribution and mean LI value (iv) were analysed as the function of fallow land age. It was found that: (i) species diversity, number of species and ln of density are linear declining function of the fallow land age; (ii) for approx. 25 years the share of diaspores of identified species groups has been relatively similar. Seed banks of 40-50-year-old fallow lands are dominated by Calluna vulgaris, while the seed bank of the old fresh coniferous forest is dominated by dicotyledonous perennials and grasses; (iii) within the first 50 years of succession the persistence of seed banks measured by the Longevity Index increases gradually.
Microbial secondary succession in soil microcosms of a desert oasis in the Cuatro Cienegas Basin, Mexico  [PDF]
Nguyen E. López-Lozano,Karla B. Heidelberg,William C. Nelson,Felipe García-Oliva
PeerJ , 2013, DOI: 10.7717/peerj.47
Abstract: Ecological succession is one of the most important concepts in ecology. However for microbial community succession, there is a lack of a solid theoretical framework regarding succession in microorganisms. This is in part due to microbial community complexity and plasticity but also because little is known about temporal patterns of microbial community shifts in different kinds of ecosystems, including arid soils. The Cuatro Cienegas Basin (CCB) in Coahuila, Mexico, is an arid zone with high diversity and endemisms that has recently been threatened by aquifer overexploitation. The gypsum-based soil system of the CCB is one of the most oligotrophic places in the world. We undertook a comparative 16S rRNA 454 pyrosequencing study to evaluate microbial community succession and recovery over a year after disturbance at two sites. Results were related to concurrent measurements of humidity, organic matter and total C and N content. While each site differed in both biogeochemistry and biodiversity, both present similar pattern of change at the beginning of the succession that diverged in later stages. After one year, experimentally disturbed soil was not similar to established and undisturbed adjacent soil communities indicating recovery and succession in disturbed soils is a long process.
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