Download or read book Investigation of Rhizosphere Priming Effects for N Mineralisation in Contrasting Soils written by Conor Murphy and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the context of nutrient cycling in soil, plant-mediated mineralisation of carbon (C) and nitrogen (N) is poorly understood. The broad focus of this thesis was to investigate the potential importance of plant-mediated mineralisation (i.e.priming) on C and N mineralisation in soils with contrasting crop productivities. The studies focus on two soils, which had similar chemical and physical properties but contrasting plant productivities relating to their N supply capacity. These soils were used to investigate the potential importance of priming processes in contributing to the contrasting capacities of these soils to supply N for plant growth. 13C and 15N stable isotopes were used to measure specific gross C and N fluxes. Sole C or N and combined C with N treatments were established to disentangle the effect of carbon and nitrogen availability on plant-mediated mineralisation. The addition of labile C increased gross carbon and nitrogen fluxes from native soil organic matter (SOM) but the effect was soil specific. The addition of nitrogen did not affect SOM mineralisation in either soil. The much lower C-to-N ratio of the 'primed' flux compared to the 'basal' flux indicated that the primed flux utilises different OM pools highlighting that primed and basal mineralisation may be distinct processes. The priming response (i.e. positive or negative and associated mechanisms) was different depending on carbon and nitrogen supply to the microbial community. Overall, the studies in this thesis places the microbial community as the focal point of soil N supply. This data strongly supports the concept that the release of labile carbon from plant roots functions as a nutrient acquisition response, increasing mineralisation of SOM. From the data a conceptual model of priming mechanisms, based on nutrient availability to the microbial community, was established. This could be used as the foundation to develop key concepts for sustainable agricultural practices.
Download or read book Methods of Soil Analysis Part 2 written by Richard W. Weaver and published by ACSESS. This book was released on 1994 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil sampling for microbiological analysis; Statistical treatment of microbial data; Soil sterilization; Soil water potencial; Most probable number counts; Light microscopic methods for studying soil microorganisms; Viruses; Recovery and enumeration of viable bacteria; Coliform bacteria; Autotrophic nitrifying bacteria; Free-living dinitrogen-fixing bacteria; Legume nodule symbionts; Anaerobic bacteria and processes; Denitrifiers; Actiomycetes; Frankia and the actinorhizal symbiosis; Filamentous fungi; Vesicular-arbuscular mycorrhizal fungi; Isolation of microorganisms producting antibiotics; Microbiological procedures for biodegradation research; Algae and cyanobacteria; Marking soil bacteria with lacZY; Detection of specific DNA sequences in environmental sample via polymerase chaim reaction; Isolation and purification of bacterial DNA from soil; Microbial biomass; Soil enzymes; Carbon mineralization; Isotopic methods for the study of soil organic matter dynamics ; Practical considerations in the use of nitrogen tracers in agricultural and environmental research; Nitrogen availability; Nitrogen mineralization, immobilization, and nitrification; Dinitrogen fixation; Measuring denitrification in the field; Sulfur oxidation and reduction in soils; Iron and manganese oxidation and reduction.
Download or read book Estimating Nitrogen Mineralization Potential of Soils and the Effect of Water and Temperature and Crop Residues on Nitrogen Net Mineralization written by Amabelia Silvia del Pino Machado and published by Cuvillier Verlag. This book was released on 2005 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temperature Control of Rhizosphere Priming Effect on Soil Organic Matter Decomposition written by Biao Zhu and published by . This book was released on 2010 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Humic Substances in Terrestrial Ecosystems written by A. Piccolo and published by Elsevier. This book was released on 1996-06-07 with total page 689 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the increasing importance of humic substances in the different scientific fields related to terrestrial ecology, soil quality conservation, and environmental chemistry. It shows that modern humic substances research is not only directed to unravel their yet ill-defined chemical structure but is successfully exploring the interconnected chemical, biological, and physical processes that maintain the ecological equilibrium of soil and ensure a sustainable agricultural production. The book will primarily be of interest to soil scientists and to ecological and environmental scientists. People in the fields of forest science, agronomy, analytical and environmental chemistry, water science, environmental engineering, and coal science will also find this publication worthy of their attention.
Download or read book The Rhizosphere written by Roberto Pinton and published by CRC Press. This book was released on 2007-05-11 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the rhizosphere, exudates from plants and microorganisms as well as stable soil organic matter influence processes that can control plant growth, microbial infections, and nutrient uptake. As the chemistry and biochemistry of these substances becomes more and more clear, their study promises to shed light on the complex interactions between plan
Download or read book Factors of Soil Formation written by Hans Jenny and published by Courier Corporation. This book was released on 1994-01-01 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masterpiece offers a detailed discussion of the nature of the earth's terrestrial environment, and a method of subdividing and studying it. 1941 edition.
Download or read book Rhizosphere Biology Interactions Between Microbes and Plants written by Vadakattu V. S. R. Gupta and published by Springer Nature. This book was released on 2020-08-21 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a detailed discussion on the direct interactions of plants and microorganisms in the rhizosphere environment. It includes fifteen chapters, each focusing on a specific component of plant-microbe interactions, such as the influence of plants on the root microbiome, and the downstream effects of rhizosphere microbial dynamics on carbon and nutrient fluxes in the surroundings. As such, the book helps readers gain a better understanding of diversity above the ground, and its effect on the microbiome and its functionality.
Download or read book Mass Spectrometry of Soils written by Thomas Boutton and published by CRC Press. This book was released on 1996-05-30 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work provides detailed coverage of the applications of proven spectometric techniques in soil science. It presents analytical approaches important in the study of pool sizes and the dynamics of macro- and micronutrients, the structure and function of soil organic matter, and the co-evolution of soils, plant communities and climate. Interdisciplinary perspectives from soil science, ecology, geology, chemistry, biogeochemistry, agronomy and physics, are offered.
Download or read book Effects of Rhizosphere Priming and Microbial Functions on Soil Carbon Turnover written by Davidson A. Lloyd 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 Organic Matter and Biological Activity written by D. Vaughan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognized that soil organic matter is the key to soil fertility. As a nutrient store it gradually provides essential elements which the soil cannot retain for long in inorganic form. It buffers growing plants against sudden changes in their chemical environment and preserves moisture in times of drought. It keeps the soil in a friable, easily penetrated physical condition, well-aerated and free draining, providing young seedlings with an excellent medium for growth. But it has another property, the nature and extent of which have been the subject of argu ment and controversy ever since scientists began to study the soil, and that is its ability to affect growth directly, other than by providing nutrient elements. Any one wishing to learn about these effects has been faced with a daunting mass of literature, some confusing, often contradictory, and spread through a multitude of journals. Individual aspects have been covered from time to time in reviews but there has obviously been a need for a modern authoritative text book dealing with the many facets of this subject, so the publication of this volume is timely. The editors and authors are all specialists in their fields, fully familiar with the com plex nature of soil organic matter and with the particular difficulties arising in any study of its properties. Where controversies exist they have presented all sides of the argument and have highlighted areas where further work is badly needed.
Download or read book Agroecosystem Diversity written by Gilles Lemaire and published by Academic Press. This book was released on 2018-10-08 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agro-Ecosystem Diversity: Impact on Food Security and Environmental Quality presents cutting-edge exploration of developing novel farming systems and introduces landscape ecology to agronomy. It encompasses the broad range of links between agricultural development and ecological impact and how to limit the potential negative results. Presented in seven sections, each focusing on a specific challenge to sustaining diversity, the book provides insights toward the argument that by re-introducing diversity, it should be possible to maintain a high level of productivity of agro-ecosystems while also maintaining and/or restoring a satisfactory level of environment quality and biodiversity. Demonstrates that diversified agro-ecosystems can be intensified with environmental quality preserved, restored and enhanced Includes analysis of economic constraints leading to specialization of farms and regions and the social locking forces resisting to diversification of agro-ecosystems Presents a global vision of world agriculture and the tradeoff between a necessary increase in food production and restoring environment quality
Download or read book Solute Movement in the Rhizosphere written by P. B. Tinker and published by Oxford University Press. This book was released on 2000-03-02 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a completely revised edition of the previously titled Solute Movement in the Soil-Root System. It describes in detail how plant nutrients and other solutes move in the soil in response to plant uptake, and it provides a basis for understanding processes in the root zone so that they can be modeled realistically in order to predict the effects of variations in natural conditions or our own practices.
Download or read book Forest Monitoring written by and published by Newnes. This book was released on 2013-03-16 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for comparable, long-term, high quality data on forest ecosystems' status and changes is increasing at the international and global level. Yet, sources for such data are limited and in many case it is not possible to compare data from different monitoring initiatives across space and time because of methodological differences. Apart from technical manuals, there is no comprehensive multidisciplinary, scientific, peer-reviewed reference for forest monitoring methods that can serve and support the user community. This book provides in a single reference the state-of-the-art of monitoring methods as applied at the international level. The book present scientific concepts and methods that form the basis of the transnational, long-term forest monitoring in Europe and looks at other initiatives at the global level. Standardized methods that have been developed over two decades in international forest monitoring projects are presented. Emphasis is put on trans-nationally harmonized methods, related data quality issues, current achievements and on remaining open questions. A comprehensive overview of needs, requirements, organization and possible outcomes of an integrated monitoring program Tested and quality assured, internationally harmonized methodologies based on a complete revision of existing methods carried out in 2009-2011 Connection with monitoring results allows assessment of the potential of the monitoring method
Download or read book Biochar for Environmental Management written by Johannes Lehmann and published by Taylor & Francis. This book was released on 2024-06-03 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully revised and updated for its third edition, this book presents the definitive compilation of current knowledge on all aspects of biochar. Research on biochar continues to accelerate as its importance for soil health, climate change mitigation and adoption, and the circular economy becomes more widely acknowledged. This book not only reviews recent advances made in our understanding of biochar properties, behavior, and effects in agriculture, environmental management, and material production, but specifically develops fundamental principles and frameworks of biochar science and application. This third edition has been fully revised and updated to reflect recent developments and growing trends, with important coverage of the application of biochar outside of its traditional soil-based uses, the commercialization of biochar, and its incorporation into policy. This includes brand new chapters on the role of biochar-based materials for environmental remediation, building construction, and animal feed, and a greater discussion of biochar's role in the circular economy, climate change mitigation, and sustainable development. Overall, this book provides a systematic, comprehensive, and global examination of biochar. Written by an international team of academics and professionals, it addresses its uses, production, and management and its broader potential for mitigating climate change and driving forward sustainable development. Edited by two leading figures in the field, Biochar for Environmental Management is essential reading for students, scholars, practitioners, and policymakers interested in biochar and the role it can play in environmental sustainability and global sustainable development.
Download or read book Microbiological Activity for Soil and Plant Health Management written by Ravindra Soni and published by Springer Nature. This book was released on 2021-11-24 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants and the soil they grow in, are confronted with severe biotic and abiotic stresses viz. nutrient starvation, salt stress, drought, flooding, xenobiotic contamination, in order to sustain in an ecosystem. They also shape the microbial composition in their vicinity by modulating their secretions. This book discusses the pressing demand for novel and potential microorganisms to support an environment-friendly and cost-effective way of stress management in the plants. The book summarizes the processes and mechanisms involved in microbe-assisted plant and soil stress management. It discusses the challenges and opportunities in the application of microbial interactions in plant health. It describes in detail the nutrient dynamics of different soil systems. It includes important topics like agriculturally important genes and enzymes, rhizosphere modeling & engineering, genetically engineered bio-inoculants etc. It also talks about the application of next-generation technologies, omics and nano-based technologies. In the recent years, more than 50% of agricultural production relies on chemical fertilizers, leading to serious health issues and environmental concerns. This book provides natural solutions to these environmental concerns. This book is useful for researchers and students in the field of microbiology, agriculture, soil biology and plant sciences.
Download or read book Biochar assisted Remediation of Contaminated Soils Under Changing Climate written by Shah Fahad and published by Elsevier. This book was released on 2024-04-26 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil contamination with heavy metals like Cr, Co, Cu, Ni, Mn, Cd, Pb, and Zn is becoming a main problem across the globe especially in developed countries. Globally, it has become a serious threat to human health and ecosystem integrity. applying amendments like phosphate compounds, liming materials, clay minerals, coal fly ash, organic composts, metal oxides, and biochar to heavy metals contaminated soil is considered one of the most promising in-situ remediation techniques. Biochar has become one of the most attractive research hotspots as a result of its special properties along with its important role in the climate change, global biogeochemical cycle and environmental system. This book will summarize recent progresses in understanding (a) metal-biochar interactions in soils, (b) potential risks associated with biochar amendment and (c) application of biochar for the remediation of HM polluted soils. In addition, research gaps and future directions in understanding biochar-metal interactions in soils will also be explored. Enables readers to understand the most recent developments surrounding metal-biochar interactions in soils and their impact on agricultural productivity Provides the latest statistics and literature review regarding the role of biochar in remediation of heavy metals polluted soils Examines the global status of heavy metals polluted soil
