Download or read book Soil Carbon Dynamics in a Nitrogen enriched Grassland microform written by Heidorn, Christina Melanie and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2000 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Carbon Dynamics in a Nitrogen enriched Grassland written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Carbon Dynamics in a Nitrogen enriched Grassland written by Christina Melanie Heidorn and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil organic carbon (SOC) dynamics were investigated in a grassland where 13 years of N fertilization shifted vegetation from C4 to C 3 species. The fraction of organic matter (OM) input retained in the soil ranged from 17 to 28%, and was unaffected by litter quality (C:N ratio). Isotopic composition ([delta]13C) of soil ranged from -19.7 to -24.9‰; there was no isotopic fractionation during formation of SOC from plant inputs. [delta]13C of active and slow SOC pools described by the CENTURY model ([delta]13C active and [delta]13Cslow, respectively) were estimated from soil incubation [delta]13Cslow was strongly correlated to [delta]13C of OM inputs during 13 years. The size of the active pool ranged from 1.9 to 13.6% of total SOC and was related to plant growth and species diversity. [delta]13C active, did not reflect [delta]13C of recent OM inputs. Any interpretation of [delta]13Cactive, must consider the plant and physical conditions when sampling occurred.

Download or read book Nitrogen and Carbon Dynamics in Grassland Soils and Plants After Application of Digestate written by Meike Andruschkewitsch and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soil Management and Climate Change written by Maria Angeles Munoz and published by Academic Press. This book was released on 2017-10-16 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Management and Climate Change: Effects on Organic Carbon, Nitrogen Dynamics, and Greenhouse Gas Emissions provides a state of the art overview of recent findings and future research challenges regarding physical, chemical and biological processes controlling soil carbon, nitrogen dynamic and greenhouse gas emissions from soils. This book is for students and academics in soil science and environmental science, land managers, public administrators and legislators, and will increase understanding of organic matter preservation in soil and mitigation of greenhouse gas emissions. Given the central role soil plays on the global carbon (C) and nitrogen (N) cycles and its impact on greenhouse gas emissions, there is an urgent need to increase our common understanding about sources, mechanisms and processes that regulate organic matter mineralization and stabilization, and to identify those management practices and processes which mitigate greenhouse gas emissions, helping increase organic matter stabilization with suitable supplies of available N. - Provides the latest findings about soil organic matter stabilization and greenhouse gas emissions - Covers the effect of practices and management on soil organic matter stabilization - Includes information for readers to select the most suitable management practices to increase soil organic matter stabilization

Download or read book Carbon and Nitrogen Dynamics in Compost amended Soils microform written by Derek Henry Lynch and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2003 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Chronosequence of Soil Carbon and Nitrogen Dynamics in Tropical Multistrata Agroforestry Systems microform written by Marney Elizabeth Isaac and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2003 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Carbon and Nitrogen Dynamics for Soil Management written by M J Shaffer and published by CRC Press. This book was released on 2019-08-30 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good management practices for carbon and nitrogen are vital to crop productivity and soil sustainability, as well as to the reduction of global greenhouse gases and environmental pollution. Since the 1950's, mathematical models have advanced our understanding of carbon and nitrogen cycling at both the micro- and macro-scales. However, many of the models are scattered in the literature, undergo constant modification, and similar models can have different names. Modeling Carbon and Nitrogen Dynamics for Soil Management clarifies the confusion by presenting a systematic summary of the various models available. It provides information about strengths and weaknesses, level of complexity, easiness of use, and application range of each model. In nineteen chapters, internationally known model developers and users update you on the current status and future direction of carbon and nitrogen modeling. The book's coverage ranges from theoretical comparison of models to application of models to soil management problems, from laboratory applications to field and watershed scale applications, from short-term simulation to long-term prediction, and from DOS-based computer programs to Object-Oriented and Graphical Interface designs. With this broad scope, Modeling Carbon and Nitrogen Dynamics for Soil Management provides the tools to manage complex carbon/nitrogen processes effectively.

Download or read book Modeling Carbon and Nitrogen Dynamics for Soil Management written by Marvin James Shaffer and published by . This book was released on 2001 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents a systematic summarization of the models available to carbon and nitrogen dynamics for soil management, and provides information about the strengths and weaknesses, level of complexity, ease of use and the application range of each model.

Download or read book Soil Carbon Dynamics Along Gradients of Climate and Land use written by Alan Ronald Townsend and published by . This book was released on 1993 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Plant soil Interactions on Grassland Carbon Dynamics in a Changing World written by Robert Kenneth Connell and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants are a major conduit through which carbon moves between the atmosphere and the terrestrial biosphere. The organic inputs from plants provide energy to soil microbes which fuels microbial extracellular enzyme production. Soil microbial activity determines the proportion of plant organic inputs that remains stored in soil as organic matter or is mineralized and released back into the atmosphere as carbon dioxide. Plant-soil interactions are, therefore, a critical driver of terrestrial carbon cycling. We live in an era of human-driven change which affects every aspect of ecosystem functioning, so it is critical to understand how different global change factors modulate the plant-soil interactions that influence carbon cycling. In this dissertation I focus on the effects of four specific global change factors on plant-soil interactions in a tallgrass prairie ecosystem: (1) land-use change (i.e., fire suppression and bison removal), (2) woody encroachment, (3) plant invasion, and (4) nutrient enrichment. The overall conclusion from my dissertation research is that all four of these global change factors alter plant-soil interactions in ways that change the storage or turnover of soil carbon. First, long-term fire suppression and/or bison exclusion increases soil C content over time. This change in soil C content is associated with an increase in woody plants in the case of fire suppression or an increase in the dominance of warm-season grasses in the case of bison exclusion under a frequent fire regime. Second, potential C mineralization rates under clonal woody shrubs is higher when the microbial community is decomposing proportionally more shrub-derived organic matter, suggesting that the rate of soil C flux may be dependent on how long the soil has been occupied by woody species. Third, the invasive grass Bromus inermis induces legacy effects on soil microbial community composition and soil organic matter (SOM) decomposition rates. These legacy effects persist for at least six months post-invasive grass removal. Finally, phosphorus fertilization stimulates the rate of SOM decomposition in soil undergoing woody encroachment, but nitrogen fertilization does not. Collectively, these results suggest that the effects of many global change factors on carbon cycling is dependent on spatiotemporal context and historical factors. Additionally, since each of the global change factors I studied affected carbon cycling independently, it will be important to study the combined effects of multiple global change factors acting simultaneously in order to better predict how carbon cycles through terrestrial ecosystems as the world continues to change.

Download or read book Effects of Grassland Management Intensification on Dynamics of Soil Organic Carbon and Nitrogen in Temperate Grassland Soils written by Anja Marie Nüsse and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen Deposition Effects on Soil Carbon Dynamics in Temperate Forests written by Shimon Ozeri Ginzburg and published by . This book was released on 2014 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Labile and Total Carbon and Nitrogen Dynamics in Two Grassland Ecosystems written by Douglas Walter Grant and published by . This book was released on 2004 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Consequences of Land Use Change from Conventional Agriculture to Perennial Grassland for Soil Carbon and Nitrogen Dynamics written by Kendra Kay McLauchlan and published by . This book was released on 2004 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Influences of Nitrogen on Carbon Dynamics in Forest Soil and Density Fractions written by Christopher W. Swanston and published by . This book was released on 2000 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Application of N fertilizer is a common forest management practice in the Pacific Northwest, yet the long-term influence of fertilization on forest soil properties is not well known. Although elevated N often increases mineralization of C and N from labile organic matter, negative effects have been documented in recalcitrant organic matter and whole soil. Using a series of paired plots in which one of each pair had undergone long-term N fertilization, I investigated the effects of elevated N on C and N mineralization in forest soils and organic fractions. The O2 horizons (O2), whole soils (WS), light fractions (LF), heavy fractions (HF), and physically recombined fractions (RF), from the paired plots were incubated in the laboratory for 300 d. For control soils, an additional "summed" fraction (SF), was computed from LF and HF results. Prior to analysis of the effects of elevated N, a general test of the density fractionation technique was conducted in the control soils. The LF and HF were hypothesized to represent labile and recalcitrant fractions in soil, but C and N were not substantially more stable in the HF during the incubation. Total cumulative respiration and N mineralization were similar for both the SF and the WS, but C and N mineralization in both fractions were higher than in the RF. The depressed respiration in the RF might be explained by an antagonistic interaction between the varied microbial communities that degrade LF and HF; in the heterogeneous WS, these communities may be spatially separated. The density separation technique appears to be a viable method for isolating and studying different soil fractions, but these fractions should be considered more carefully in the context of microbial interaction and soil spatial heterogeneity. Elevated N depressed cumulative respiration to a similar extent in all substrates. The mechanisms most involved in degrading these substrates are negatively affected by elevated N, but may not be the same in each substrate. While laboratory results may not withstand the variability of the natural environment, the potential for elevated N to stabilize C in soil suggests the need for more detailed field measurements.

Download or read book The Influence of Long term Soil Warming and Increased Nitrogen Availability on Carbon Dynamics of Subarctic Grasslands written by Niel Verbrigghe and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: