Download or read book Impacts of Landscape Position and Nitrogen Fertilizer on Soils Carbon and Nitrogen Leaching and Greenhouse Gas Fluxes from Switchgrass Production in South Dakota written by Liming Lai and published by . This book was released on 2017 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Grain Yield and Greenhouse Gas Emissions from Organic and Conventional Cropping Systems on Claypan Soil Landscapes written by Dara Lynn Boardman and published by . This book was released on 2015 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing world populations, farmers must become more efficient at producing food, fiber and fuel while reducing negative environmental impacts. The first objective of this study was to determine the effects of tillage, cover crops, and compost rate on organic grain crop production, greenhouse gas (GHG) flux, and soil N content. Carbon dioxide (CO2) and nitrous oxide (N2O) of this organic management study were much lower than what others have reported, attributed to drought conditions and the use of compost. Across all crops, TNCC and TCC out-yielded NTCC, primarily due to increased germination in tilled systems and decreased weed pressure. The 1x and 1.5x compost treatments out-yielded the 0x and the 0.5x. The second objective of this study was to determine the GHG flux of fertilizer treatment within landscape positions of corn and switchgrass cropping systems. In 2014, switchgrass CO2 flux was approximately two times greater than corn. Corn N2O flux was almost 6 times greater than switchgrass. Synthetic fertilizer resulted in 2.5-8 times greater N2O flux than the other fertilizer treatments. The summit emitted at least 1.5 times greater GWP than the other landscape positions and synthetic fertilizer emitted about twice the GWP than other fertilizer treatments. In conjunction with this GHG research, an independent study was conducted to determine the effect of depth to claypan (DTC) on corn and switchgrass water use efficiency (WUE) and crop N recovery efficiency (REN). In dry years on depositional soils switchgrass had greater WUE and REN than corn. This research showed that in organic management systems, grain production generates low GHG emissions, NTCC yields less than tillage treatments, and at least 1x of compost is necessary to maintain yields. This research showed switchgrass to emit less N2O and be more efficient with water and N than corn. This could improve the productivity of marginal soils, such as found in Missouri, while providing a renewable fuel that emits less life-cycle GHG to meet the Renewable Fuel Standard (RFS).

Download or read book Impact of Switchgrass Bioenergy Feedstock Production on Soil Carbon Dioxide Flux and Below Ground Soil Organic Carbon Storage in East Tennessee written by Leah Denise Soro and published by . This book was released on 2011 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bioenergy production from switchgrass has shown promise in restoring degraded soils and helping to mitigate greenhouse gas (GHG) emissions. CO2 loss and C-sequestration in soils are important topics for research to better understand the environmental impacts of bioenergy crops. The need for more thorough research of the carbon cycle in soils used for bioenergy production precipitated the primary interest of this study. The specific objectives of this study were 1) to measure SOC under switchgrass production in order to predict storage of carbon in soils based on previous cropping history, land management, soil physical characteristics, and time; and to 2) measure soil CO2 flux through the entire year to establish a) the annual, seasonal, and daily respiration rates, and b) use this data with soil carbon data to better understand the carbon life cycle in soils under switchgrass production in East Tennessee. Chapter 1 of the study was conducted on twelve farms across East Tennessee. Seven previous different cropping systems, four soil textural classes, and four soil taxonomy classes are represented in this study. There was an increase in SOC of roughly 1 Mg ha−1 from 2008 to 2011. No-till planting resulted in a significant increase in SOC compared to conventional tillage planting resulting in no significant changes in SOC. Chapter 2 results as hypothesized, soil temperature and moisture had a significant influence on CO2 flux variance. Soil temperature and soil moisture were able to explain 83% and 81.5% of variance in flux from clumps (cover) and between clumps (bare) respectively. The summer months exhibited the highest flux rate followed by spring, fall, and finally winter. Although largely overlooked in previous research, the winter months did contribute 5.4 MgCO2 ha−1 season−1 (±2.5 MgCO2 ha−1 season−1) from clumps (cover) and 4.0 MgCO2 ha−1 season−1 (±3.2 MgCO2 ha−1 season−1) from between clumps (bare). Annual switchgrass flux rate was 7.39 MgCO2 ha−1 (±4.08 MgCO2 ha−1).

Download or read book Changes in Soil Carbon and Nitrogen Associated with Switchgrass Production written by Porfirio Jose Lobo Alonzo and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Greater knowledge of the short- and long-term effects of biomass production practices on soil biological and chemical properties is needed to determine influences on sustainable land management. Soil samples under switchgrass (Panicum virgatum L.), other forage grasses, cultivated crops, and forest were collected seasonally at six locations. Soil organic C (SOC), total N, soil microbial biomass C (SMBC) and N (SMBN), soil mineralizable C and N, and basal soil respiration (BSR) were in general greatest under long-term coastal bermudagrass [Cynodon dactylon (L.) Pers.] pasture (>40 years), second highest under Alamo switchgrass and kleingrass (Panicum coloratum L.) planted in 1992 and forest, followed by Alamo switchgrass planted in 1997, and was lowest under the cultivated soils. Soil organic C at 0-5 cm was 42-220% greater in soils under Alamo switchgrass planted in 1992 than cultivated soils, except at College Station where SOC values under Alamo planted in 1992 and the cultivated rotation were not significantly different. Although the rotation treatment is cultivated at this location, two high residue crops are used, wheat (Triticum aestivum L.) and sorghum [Sorghum bicolor (L.) Moench.]. Similar trends were noted for total N, SMBC, SMBN, mineralizable C and N, BSR, and the ratio of SMBC/SOC. Insufficient information was collected in this study to determine whether the parameters evaluated for forest and switchgrass were different. In addition to its high yield potential, adaptation to marginal sites and tolerance to water and nutrient limitations, switchgrass appeared to be a competitive crop in terms of land sustainability, resulting in enhanced soil quality characteristics compared to long-term cultivated soils.

Download or read book Switchgrass Cultivar and Intraspecific Diversity Impacts on Nitrogen Use Efficiency written by Aislinn Johns and published by . This book was released on 2016 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Bioenergy feedstock production is an important component of the national renewable energy strategy, which is based on biomass supply. Biofuels for ethanol production may be produced in high-input crop production systems, but the efficacy of these systems for increasing net energy yields over its full life-cycle compared to traditional fuels is under debate, because it is now evident that the benefits of feedstock production are maximized only when biofuels are derived from feedstocks produced with much lower life-cycle greenhouse-gas emissions than traditional fossil fuels. To this end, the reduction of agricultural inputs is key to developing an effective biofuel feedstock crop. Native prairie grasses have low-input production requirements, and upon land conversion for biofuel production they have positive impacts on belowground carbon (C) sequestration, a measure of soil quality. Specifically, Panicum virgatum (hereafter switchgrass), a perennial C4 grass native to the mid-west of the United States, is a promising bioenergy crop. It has large root systems, which allow it to produce large amounts of biomass with less water and nutrient requirements than traditional bioenergy crops, such as corn. To produce switchgrass feedstock in an environmentally sustainably manner (i.e., with the least amount of fertilizer inputs), we will need to adopt agricultural practices that promote N cycling efficiency in the system. Previous studies have found that different cultivars of switchgrass vary significantly in specific root length (SRL), and greater SRL may be linked to greater N acquisition owing to the root systems' greater surface area. In addition, it has been found that growing switchgrass in genotypically diverse mixtures enhanced biomass production, which may result from belowground niche differentiation and complementarity effects that enhance N acquisition. With this study, I aimed to evaluate (1) whether differences in the architecture among root systems of switchgrass cultivars led to differences in the efficiency of nitrogen uptake, and (2) whether growing switchgrass cultivars in diverse mixtures would enhance the efficiency of nitrogen cycling though niche differentiation and complementarity effects. Our experiment was conducted at the Sustainable Bioenergy Crop Research Facility at the Fermilab National Environmental Research Park, where experimental field plots consisted of seven switchgrass cultivars, planted either in monoculture or in diverse mixtures of 2, 4, or 6 randomly selected cultivars. To evaluate differences in nitrogen use efficiency (NUE) among cultivars in monocultures and among diversity treatments, I applied a stable isotope 15N tracer at the beginning of the growing season. Following senescence, the switchgrass was harvested and the percent of 15N recovered was measured in the aboveground biomass to determine NUE. I found that switchgrass cultivars differed in NUE and these differences could potentially be linked to germplasm origin in relation to the field site. I also found that NUE was not influenced by increases in cultivar diversity. Our results suggest that NUE is not the sole mechanism behind greater biomass production associated with enhanced diversity."--Boise State University ScholarWorks.

Download or read book Soil Ecology and Management written by Joann K. Whalen and published by CABI. This book was released on 2010 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the organisms inhabiting the soil, their functions and interactions and the dimensions of human impact on the activity of soil organisms and soil ecological function; and discusses basic soil characteristics and biogeochemical cycling, key soil flora and fauna, community-level dynamics (soil food webs) and the ecological and pedological functions of soil organisms. Also conveys an understanding of how human activities impact upon soil ecology in a section on ecosystem management and its effects on soil biota.

Download or read book Soil Carbon Nitrogen Sequestration and Greenhouse Gas Mitigation Under Global Change written by Ling Zhang and published by Mdpi AG. This book was released on 2023-04-21 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global change induced extreme climate events are becoming more common than ever. Soil carbon and nitrogen pools correlated significantly with changes in atmospheric greenhouse gas. Large increase in atmospheric greenhouse gases, majorly carbon dioxide, nitrous oxide, and methane, can enhance the heating of atmosphere, which will be generally followed by global warming. Mitigation of greenhouse gas emissions including various strategies, such as the sequestrations of carbon and nitrogen in soil, plant or ecosystems, efficient management of agricultural and forestry ecosystems, mitigation of ecosystem carbon and nitrogen leaching, etc. The mitigation of greenhouse gas emissions from all kinds of sources will be therefore crucial in mitigation of global climate change. This reprint gathered latest case studies and methodologies, including, but not limited to measurement and mitigation strategies of carbon and nitrogen pools in soil, plant, or ecosystems, and greenhouse gas emissions, will substantially improve our understanding of the potential, ability, and capacity of ecosystems in mitigation of greenhouse gas emissions and hence global climate change. This reprint can be used by colleagues working on global climate change, ecology, agriculture, forestry and policy makers associated with global change. Chapters included in this reprint were contributed by colleagues from China, Egypt, Italy, Jordan, Mexico, Pakistan, Saudi Arabia, Turkey, etc. It can be used in most countries in the world.

Download or read book Disturbance Effects on Soil Carbon and Greenhouse Gas Emissions in Forest Ecosystems written by Scott X. Chang and published by MDPI. This book was released on 2020-05-23 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest ecosystems are often disturbed by agents such as harvesting, fire, wind, insects and diseases, and acid deposition, with differing intensities and frequencies. Such disturbances can markedly affect the amount, form, and stability of soil organic carbon in, and the emission of greenhouse gases, including CO2, CH4, and N2O from, forest ecosystems. It is vitally important that we improve our understanding of the impact of different disturbance regimes on forest soil carbon dynamics and greenhouse gas emissions to guide our future research, forest management practices, and policy development. This Special Issue provides an important update on the disturbance effects on soil carbon and greenhouse gas emissions in forest ecosystems in different climate regions.

Download or read book Impacts of Integrated Crop livestock System on Soil Surface Greenhouse Gas Fluxes at a Farm Scale in South Dakota written by Brant Douville and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Greenhouse Gas Emissions and Soil Carbon Stocks Associated with Crop Residues and Organic Fertilizers Mixtures in Sugar Cane Cropping Systems written by Vladislav Dimitrov Kyulavski and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the current environmental context, it is crucial to optimize the use of resources to reduce waste and greenhouse gas (GHG) emissions. Renewable resources use and recycling lies at the heart of the circular economy model, in which a waste is a mobilizable, transformable, reusable and therefore renewable resource. In agriculture, the “virtuous circle” of circular economy can be achieved through the recycling of organic wastes as fertilizer and the adoption of an agroecological approach that favors ecosystem services for pest control, soil protection and carbon stocks increase, one of the examples of which is mulching. In sugarcane cropping systems straw left on the soil surface is also increasingly coveted by industrial sector to produce second-generation agrofuels. The emerging competition for biomass use and the underlying environmental issues make it necessary to assess both, the agronomic and the environmental advantages and disadvantages of joint recycling of sugarcane mulch and organic fertilizers. Therefore, the objectives of this work are i) to compare the effect of fertilizers of contrasting physicochemical quality, on the decomposition of a sugarcane mulch, and ii) to evaluate the potential of GHG emissions from mulch-fertilizer mixtures, according to the quantity of straw left and the quality of the fertilizers applied. The research strategy adopted in a first step aimed to detect carbon/nitrogen interactions during the combined recycling of straw and organic fertilizers. We have thus tested the predictability of the mineralization dynamics of C and N of the organic materials alone, or in mixture (straw/fertilizer) in the laboratory, by a simple additive model, and a mechanistic model of carbon and nitrogen transformation in the soil - CANTIS. Our results showed that both models overestimated the C mineralization and did not correctly predict the N mineralization of the mixtures. This antagonistic interaction for the mixtures was corrected by the application of a contact factor in CANTIS, which reflects the bioavailability decrease of C and N, due to distribution heterogeneities at a fine scale within the soil. In a second step, we conducted field trials (under real conditions) to measure both the decomposition of sugarcane straw mixed with organic fertilizers and GHG emissions. The amount of straw decomposed was proportional to the initial amount left and was affected neither by the amount of straw nor the type of fertilizer provided. This proportionality is transposable to the potential for carbon sequestration in the soil and should be considered when setting up carbon sequestration or when exporting the straw for alternative use. The type of fertilizer plays a key role in GHG emissions in the short term after fertilization. The highest average CO2 and N2O emission fluxes were obtained by applying pig slurry, which has a high water content and is rich in mineral N. Conversely, the kinetics of GHG emissions from solid fertilizers have been governed by environmental factors, some of which could be controlled, such as water intake or fertilizer quantity application. The use of organic fertilizers is beneficial when they are rich in organic N and poor in water content, such as dry sewage sludge, but the mineralization of nitrogen in this case is gradual and requires elaboration of a specific application strategies to meet crop needs. A better integration of the interactions between the different N and C sources should be considered, in order to develop modeling as a precise tool for the management of an agroecosystem.

Download or read book Soil Nutrient and Greenhouse Gas Cycles in Managed Mixed Deciduous Ontario Forests written by Carolyn Louise Winsborough 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 Carbon Dynamics in Switchgrass Land Managed for Biomass Production written by DoKyoung Lee and published by . This book was released on 2003 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biochar Application written by T. Komang Ralebitso-Senior and published by Elsevier. This book was released on 2016-05-07 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochar Application: Essential Soil Microbial Ecology outlines the cutting-edge research on the interactions of complex microbial populations and their functional, structural, and compositional dynamics, as well as the microbial ecology of biochar application to soil, the use of different phyto-chemical analyses, possibilities for future research, and recommendations for climate change policy. Biochar, or charcoal produced from plant matter and applied to soil, has become increasingly recognized as having the potential to address multiple contemporary concerns, such as agricultural productivity and contaminated ecosystem amelioration, primarily by removing carbon dioxide from the atmosphere and improving soil functions. Biochar Application is the first reference to offer a complete assessment of the various impacts of biochar on soil and ecosystems, and includes chapters analyzing all aspects of biochar technology and application to soil, from ecogenomic analyses and application ratios to nutrient cycling and next generation sequencing. Written by a team of international authors with interdisciplinary knowledge of biochar, this reference will provide a platform where collaborating teams can find a common resource to establish outcomes and identify future research needs throughout the world. Includes multiple tables and figures per chapter to aid in analysis and understanding Includes a comprehensive table of the methods used within the contents, ecosystems, contaminants, future research, and application opportunities explored in the book Includes knowledge gaps and directions of future research to stimulate further discussion in the field and in climate change policy Outlines the latest research on the interactions of complex microbial populations and their functional, structural, and compositional dynamics Offers an assessment of the impacts of biochar on soil and ecosystems

Download or read book Climate Resilient Agriculture written by Arun Shanker and published by BoD – Books on Demand. This book was released on 2018-03-14 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing climatic scenario has affected crop production in the adverse ways, and the impact of it on agriculture is now emerging as a major priority among crop science researchers. Agriculture in this changing climatic scenario faces multiple diverse challenges due to a wide array of demands. Climate-resilient agriculture is the need of the hour in many parts of the world. Understanding the adverse effects of climatic change on crop growth and development and developing strategies to counter these effects are of paramount importance for a sustainable climate-resilient agriculture. This multiauthored edited book brings out sound climate-resilient agriculture strategies that have a strong basic research foundation. We have attempted to bridge information from various diverse agricultural disciplines, such as soil science, agronomy, plant breeding, and plant protection, which can be used to evolve a need-based technology to combat the climatic change in agriculture.

Download or read book Effects of Precipitation Changes on Switchgrass Biomass and Greenhouse Gas Emission written by Sadiye Aras and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Nitrogen and Phosphorous Fertilizers on the Growth Responses of Sand Bluestem and Switchgrass written by Neptale Q. Zabala and published by . This book was released on 1965 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantifying Soil Greenhouse Gas Emissions and Soil Carbon Storage to Determine Best Management Practices in Agroecosystems written by Tyler R. Goeschel and published by . This book was released on 2016 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensive agriculture, coupled with an increase in nitrogen fertilizer use, has contributed significantly to the elevation of atmospheric greenhouse gases (GHGs), including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). Rising GHG emissions usually mean a decrease in soil carbon. Currently, soil C is twice that of all standing crop biomass, making it an extremely important player in the C cycle. Fortunately, agricultural management practices have the potential to reduce agricultural GHG emissions whilst increasing soil C. Management practices that impact GHG emissions and soil C include various tillage practices, different N fertilization amounts and treatments (synthetic N, cattle manure, or a combination of both), the use of cover crops, aeration, and water levels. Employing agricultural best management practices (BMPs) can assist in the mitigation and sequestration of CO2, N2O and soil C. Measuring soil carbon storage and GHG emissions and using them as metrics to evaluate BMPs are vital in understanding agriculture’s role in climate change. The objective of this research was to quantify soil carbon and CO2 and N2O emissions in agroecosystems (dairy, crop, and meat producing farms) under differing management practices. Three farms were selected for intensive GHG emissions sampling: Shelburne Farm in Shelburne, VT, a dairy in North Williston, VT, and Borderview Farm in Alburgh, VT. At each site, I collected data on GHG (CO2 and N2O) emissions and soil carbon and nitrogen storage to a depth of 1 meter. Soil emissions of CO2 and N2O were taken once every two weeks (on average) from June 2015 through November, 2015 using static flux chambers and a model 1412 Infrared Photoacoustic Spectroscopy (PAS) gas analyzer (Innova Air Tech Instruments, Ballerup, Denmark). Fluxes were measured on 17 dates at Shelburne Farms, 13 dates at the Williston site, and 13 dates in the MINT trial. Gas samples were taken at fixed intervals over a 10-14 minute time frame, with samples normally taken every one or two minutes. I also measured soil carbon to a depth of 1m in six BMPs at Borderview Farm. Overall, I found that manure injection increased N2O and CO2 emissions, but decreased soil C storage at depth. Tillage had little to no impact on N2O emissions, except at Shelburne Farms, where aeration tillage decreased N2O emissions (marginally significant, P