Download or read book A Morphological Study of Switchgrass Panicum Virgatum written by Francis Hobart Means and published by . This book was released on 1959 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Switchgrass Panicum Virgatum L Forage Quality as Influenced by Interrelationships Among Biological Chemical Morphological and Anatomical Determinants written by Edward Keith Twidwell and published by . This book was released on 1987 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Swicthgrass Panicum Virgatum L as a Bioenergy Feedstock for the Northeastern and Mid Atlantic USA written by Laura Mary Cortese and published by . This book was released on 2014 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Switchgrass (Panicum virgatum L.) is a warm season, C4 perennial grass native to most of North America with numerous applications, including use as a bioenergy feedstock. Although switchgrass has emerged as a bioenergy crop throughout the midwestern and southern US, little information is available on the performance of switchgrass in the Northeast/Mid-Atlantic. In the first genetic diversity study of switchgrass populations to utilize both morphological and molecular markers, it was found that the combination of morphological and molecular markers differentiated populations best, and should be useful in future applications such as genetic diversity studies, plant variety protection, and cultivar identification. In a study that evaluated several bioenergy traits of 10 switchgrass cultivars in NJ, populations with improved agronomic characteristics were identified. Cultivar Timber exhibited the best combination of characteristics and has promise for biomass production in the Northeast/Mid-Atlantic US. In a third study, the effects of cultivar, location, and harvest date on biomass yield, dry matter, ash, and combustion energy content in three switchgrass cultivars were investigated. Results indicated that a January harvest allowed for optimal feedstock quality and that cultivars Alamo, Carthage, and Timber produced high yielding, high quality biomass. In an effort to improve the establishment capacity of switchgrass, a fourth study was conducted examining the effects of divergent selection for seed weight on germination and emergence in three switchgrass populations over two cycles of selection, and cold stratification on germination in the derived populations. Selection for seed weight alone was not sufficient to improve germination and germination rate in populations tested, while cold stratification improved germination. Therefore, breeding efforts should be directed towards reducing dormancy in order to improve switchgrass germination and establishment. The final two studies examined genotype x environment effects, estimated broad-sense heritability, and stability analysis on lignocellulosic and agronomic traits in switchgrass clones grown on marginal and prime soils in NJ. Results support the existence of both specifically and broadly adapted switchgrass germplasm, and demonstrate the need for evaluation of germplasm across multiple years and environments (including prime and marginal sites) in order to develop cultivars with optimal lignocellulosic and agronomic characteristics.

Download or read book A Cytological Study of Switchgrass Panicum Virgatum written by Robert Franklin Carver and published by . This book was released on 1957 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cytological Study of Switchgrass Panicum Virgatum written by Robert Franklin Carver and published by Hassell Street Press. This book was released on 2021-09-09 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Switchgrass Panicum Virgatum L Distribution Genetic Diversity and Pollen mediated Gene Flow written by and published by . This book was released on 2014 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Switchgrass written by Andrea Monti and published by Springer Science & Business Media. This book was released on 2012-03-09 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for renewable energies from biomass is growing steadily as policies are enacted to encourage such development and as industry increasingly sees an opportunity to develop bio-energy enterprises. Recent policy changes in the EU, USA and other countries are spurring interest in the cultivation of energy crops such as switchgrass. Switchgrass has gained and early lead in the race to find a biomass feedstock for energy production (and for the almost requisite need for bio-based products from such feedstocks). Switchgrass: A Valuable Biomass Crop for Energy provides a comprehensive guide to the biology, physiology, breeding, culture and conversion of switchgrass as well as highlighting various environmental, economic and social benefits. Considering this potential energy source, Switchgrass: A Valuable Biomass Crop for Energy brings together chapters from a range of experts in the field, including a foreword from Kenneth P. Vogel, to collect and present the environmental benefits and characteristics of this a crop with the potential to mitigate the risks of global warming by replacing fossil fuels. Including clear figures and tables to support discussions, Switchgrass: A Valuable Biomass Crop for Energy provides a solid reference for anyone with interest or investment in the development of bioenergy; researchers, policy makers and stakeholders will find this a key resource.

Download or read book Microbiome Stimulants for Crops written by James White and published by Woodhead Publishing. This book was released on 2021-04-17 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbiome Stimulants for Crops: Mechanisms and Applications provides the latest developments in the real-world development and application of these crop management alternatives in a cost-effective, yield protective way. Sections address questions of research, development and application, with insights into recent legislative efforts in Europe and the United States. The book includes valuable information regarding mechanisms and the practical information needed to support the growing microbial inoculant and biostimulant industry, thus helping focus scientific research in new directions. Provides methods for finding and testing endophytic and growth promotional microbes Explains the mechanisms of microbes and other biostimulant function in promoting plant growth Evaluates methods for treatments of plants with microbes and microbiome stimulants Identifies areas for new research

Download or read book Reproduction and Bioconfinement of MiR156 Transgenic Switchgrass Panicum Virgatum L written by Chelsea Renai Johnson and published by . This book was released on 2017 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic engineering of switchgrass (Panicum virgatum L.), an emerging cellulosic bioenergy feedstock, has been performed to alter cell walls for improved biofuel conversion. However, gene flow from transgenic switchgrass presents regulatory issues that may prevent commercialization of the genetically engineered crop in the eastern United States. Depending on its expression level, microRNA156 (miR156) can reduce, delay or eliminate flowering, which may be useful to mitigate transgene flow. However, flowering transition is dependent upon both environmental and genetic cues. In this study of transgenic switchgrass, two low (T14 and T35) and two medium (T27 and T37) miR156 overexpressing 'Alamo' lines and nontransgenic control plants were used. A two-year field experiment was performed to compare flowering, reproduction, and biomass yield in eastern Tennessee, U.S.A. Growth chamber studies assessed temperature and photoperiod effects on flowering and reproduction across a simulated latitudinal cline. In the field, medium miR156 overexpression line T37 resulted in the best overall combination of bioconfinement and biomass production. Though line T37 did flower, not all plants produced panicles, and panicle production was delayed in both years. Line T37 also produced fewer panicles, with a 65.9% reduction in year one and 23.8% reduction in year two over controls. T37 panicles produced 70.6% less flowers than control panicles during the second field year with commensurate decreased seed yield: 1205 seeds per plant vs. 18,539 produced by each control. These results are notable given that line T37 produced equivalent vegetative aboveground biomass as controls. In latitudinal simulation growth chambers, elevated temperatures and decreased daylength promoted flowering of the miR156 transgenic switchgrass lines. As temperatures increased and day lengths decreased, more plants in lines T35, T37, and controls produced panicles. The simulated (Ecuador) tropical conditions were the only chambers in which three of the four transgenic lines flowered. These results suggest that miR156 overexpression levels found in transgenic line T37 can be useful for bioconfinement, and the plants can significantly reproduce in tropical conditions, which would enable plant breeding for line improvement. Furthermore, the study suggests additional ways that miR156 can be manipulated to improve both biomass production and bioconfinement.

Download or read book Evaluation of Traits Associated with Breeding for Improved Biomass and Ethanol Yield in Switchgrass written by Virginia Roseanna Sykes and published by . This book was released on 2014 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Switchgrass (Panicum virgatum L.) is a perennial, warm season grass that can be used as a biofuel. A greater understanding of the relationship of biomass yield and ethanol yield with disease susceptibility and morphological traits, estimation of the underlying genetic parameters of these traits, and the efficacy of selection at different maturity and under different production conditions could help breeders more effectively develop improved biofuel switchgrass cultivars. To examine these issues, three studies were performed. The first examined switchgrass leaves exhibiting low, medium, and high severity of rust symptoms, caused by infection with Puccinia emaculata. Results indicate P. emaculata infection may negatively impact ethanol yield in biofuels switchgrass with predicted ethanol yield reductions of 10% to 34% in leaves exhibiting medium rust severity and 21% to 51% in leaves exhibiting high rust severity. The second study analyzed a diallel of eight parents selected from the cultivars ‘Alamo’, ‘Kanlow’, and ‘Miami’. Correlations of morphological traits to biomass yield indicate a high biomass yielding ideotype of a tall plant with a high number of thick tillers, wide leaves, and an open canopy density. Traits with moderate correlations to biomass yield showed significant, but weak, negative correlations to ethanol yield. Significant SCA effects, maternal effects, and high parent heterosis were found within all traits. Selection during the establishment year did not differ significantly from selection in subsequent years. The third study used the same diallel populations but compared evaluations under space planted conditions to simulated swards. Evaluation under sward conditions differed from evaluation under space planted conditions for estimates of mean production performance, characterization of morphological traits, estimates of genetic parameters, identification of high GCA and SCA in populations, and identification of potential maternal effects or high parent heterosis. If sward conditions are more representative of production conditions, evaluation under space planted conditions could lead to assessment and selection of plants that are less than optimal in production conditions. Results from these three studies should help breeders identify more efficient and effective methods for improving biofuel switchgrass cultivars.

Download or read book A Localized Morphometric Study of Panicum Virgatum and Sister Taxa Poaceae Panicoideae Paniceae written by Sarah Elizabeth Youngstrom and published by . This book was released on 2013 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Morphological distinctions were evaluated between taxa of Panicum section Virgata Nees as recognized by Hitchcock and Chase (1951) and Freckmann and Lelong (2002b): P. virgatum var. virgatum, P. virgatum var. cubense, P. amarum subsp. amarum, and P. amarum subsp. amarulum, using morphometrics and greenhouse experiments on material from the southeastern United States, a region with the most extreme overlap in distribution. 31 characters for 104 specimens were subject to univariate, bivariate, and multivariate analyses. Spikelet bivariate graphs showed two groups with large (C) and small (A+B) spikelets. When habitat, distribution, and phenology was superposed on these graphs, non-exclusive trends polarized the small spikelet group into two groups (A) and (B). Morphogroups A, B, and C did not overlap on PCA graphs, but were not separated by gaps. Results show two morphogroups present: A+B (P. virgatum var. virgatum, var. cubense, P. amarum subsp. amarulum) and C (P. amarum subsp. amarum).

Download or read book Germination Studies with Plant Selections of Switchgrass Panicum Virgatum L written by Ming-Yu Li and published by . This book was released on 1951 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rust Diseases on Switchgrass Panicum Virgatum written by Ying Ma and published by . This book was released on 2015 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Switchgrass (Panicum virgatum) is a perennial C4 grass native to the central prairies of North America. Recent development of switchgrass as a sustainable biofuel feedstock has raised interest in diseases that could impact switchgrass, especially when grown under monoculture conditions. Among the known diseases of switchgrass, rust diseases are the most widespread and could potentially impact yield and biomass quality of new switchgrass cultivars. Two species of rust fungi, Uromyces graminicola and Puccinia emaculata, are known to infect switchgrass, with P. emaculata being the primary or sole rust pathogen on switchgrass in southern US states. The relative importance of each of the two species in the North Central region, however, was unknown. In this study, the rust fungi on switchgrass samples collected from various locations in Nebraska, Illinois, Indiana, Missouri and Wisconsin were identified on the basis of teliospore morphology and DNA sequence analysis. Both U. graminicola and P. emaculata were found in samples from Nebraska and Wisconsin, whereas P. emaculata only was found in samples from the other states. Among 22 switchgrass strains evaluated in a Nebraska varietal experiment, lowland types were found to be more resistant to rust than upland types. Most upland switchgrass strains were infected by both rust species, while most lowland switchgrasses were infected by P. emaculata only. The results indicate that development of new biofuel switchgrass cultivars, particularly those intended for the northern plains, must include improved resistance against both rust species. As a new tool to facilitate future switchgrass research and resistance breeding efforts, a diagnostic polymerase chain reaction (PCR) system was developed whereby the two rust species can be distinguished in individual infection lesions and in infected leaves. The system utilized three sets of primers, one set (UgF and UgR) designed in this study specifically for U. graminicola on the basis of its internal transcribed spacer sequence, and the other two being previously-reported primers diagnostic for P. emaculata and for all rust fungi.

Download or read book 2019 IEEE International Workshop on Metrology for Agriculture and Forestry MetroAgriFor written by IEEE Staff and published by . This book was released on 2019-10-24 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: MetroAgriFor intends to create an active and stimulating forum where academics, researchers and industry experts in the field of measurement and data processing techniques for Agriculture, Forestry and Food can meet and share new advances and research results Attention is paid, but not limited to, new technologies for agriculture and forestry environment monitoring, food quality monitoring, metrology assisted production in agriculture, forestry and food industries, sensors and associated signal conditioning for agriculture and forestry, calibration methods for electronic test and measurement for environmental and food applications

Download or read book Management Strategies for Sustainable Cattle Production in Southern Pastures written by Monte Rouquette, Jr. and published by Academic Press. This book was released on 2019-08-22 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management Strategies for Sustainable Cattle Production in Southern Pastures is a practical resource for scientists, students, and stakeholders who want to understand the relationships between soil-plant interactions and pasture management strategies, and the resultant performance of cow-calf and stocker cattle. This book illustrates the importance of matching cattle breed types and plant hardiness zones to optimize cattle production from forages and pastures. It explains the biologic and economic implications of grazing management decisions made to improve sustainability of pastures and cattle production while being compliant with present and future environmental concerns and cattle welfare programs. Documents the effects of cattle grazing on greenhouse gas emissions and carbon footprints Discusses strategies to enhance soil fertility, soil health, and nutrient cycling in pastures Provides information on the use of stocking rates, stocking strategies and grazing systems to optimize cow-calf production of weaned calves and stockers. Presents innovations in cattle supplementation and watering systems to minimize negative impacts on water and soil health Includes methods for weed control to maintain pasture condition and ecosystem stability Describes management strategies to integrate cattle operations with wildlife sustainability

Download or read book Evaluating the Agronomic Performance of Switchgrass Panicum Virgatum L on Marginal Vs Prime Farmland written by Sergio J. Sosa and published by . This book was released on 2013 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Switchgrass (Panicum virgatum L.) is a warm-season perennial grass native to North America. The difference in biomass production between and within switchgrass ecotypes (upland and lowland) and populations due to genotype x environment interaction (GxE) has been documented. Breeding research for increased biomass production in switchgrass has been conducted on University research farms with prime farmland. This study aims to evaluate the agronomic performance of 14 cultivars and 45 high biomass producing clones of switchgrass in marginal vs. prime farmland. Additionally this study investigates the effects of increasing biodiversity (1 grass species, 3 grass species or 4 species-grass/legume combinations) on biomass production. The cultivars and biodiversity studies were seeded in 2008 and 2009 in six locations (Maryland, New Jersey, New York, Pennsylvania, South Dakota and Wisconsin) and three locations (New Jersey, New York, Pennsylvania), respectively, in paired fields (marginal vs. prime land). Each field had a nitrogen treatment 0 or 100 kg of N·ha-1·year-1. Stand establishment (% coverage), plant height (cm), tiller density (tillers·m-2) and dry biomass yield (Mg·ha-1) data was collected to determine agronomic performance. The clonal material was transplanted in 2009 in two locations (New Jersey and South Dakota). In addition to agronomic data collected, heading date, anthesis date (Julian date) and visual ratings for disease presence were recorded. Cultivars were shorter in marginal soils. For stand establishment and biomass yield, 50% of cultivars showed differences due to soil quality. For tiller density, 40% of the cultivars presented differences due to soil quality; some cultivars had higher tiller density in marginal soils. For the biodiversity study low diversity plots (one grass species) were not significantly different than yields of high diversity plots (four species-grass/legume). For the clone study, soil quality may have influenced a delay in flower initiation and other traits, such as plant height, etc. It was also observed that genotype may have been the most influential factor in tolerance to anthracnose (Colletotrichum navitas) and rust (Puccinia emaculata).

Download or read book Compendium of Bioenergy Plants written by Hong Luo and published by CRC Press. This book was released on 2014-03-14 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the most comprehensive reviews on the latest development of switchgrass research including the agronomy of the plant, the use of endophytes and mycorrhizae for biomass production, genetics and breeding of bioenergy related traits, molecular genetics and molecular breeding, genomics, transgenics, processing, bioconversion, biosystem and chemical engineering, biomass production modeling, economics of switchgrass feedstock production etc. The book will be of interest and great value to the switchgrass research communities in both academia and industry and a handbook for agronomists, geneticists, breeders, molecular biologists, physiologists, biosystems engineers and chemical engineers.