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Author: Chu T Hoanh
Publisher: CABI
ISBN: 1780643667
Category : Science
Languages : en
Pages : 240
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Book Description
The book provides an analysis of impacts of climate change on water for agriculture, and the adaptation strategies in water management to deal with these impacts. Chapters include an assessment at global level, with details on impacts in various countries. Adaptation measures including groundwater management, water storage, small and large scale irrigation to support agriculture and aquaculture are presented. Agricultural implications of sea level rise, as a subsequent impact of climate change, are also examined.
Author: Chu T Hoanh
Publisher: CABI
ISBN: 1780643667
Category : Science
Languages : en
Pages : 240
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Book Description
The book provides an analysis of impacts of climate change on water for agriculture, and the adaptation strategies in water management to deal with these impacts. Chapters include an assessment at global level, with details on impacts in various countries. Adaptation measures including groundwater management, water storage, small and large scale irrigation to support agriculture and aquaculture are presented. Agricultural implications of sea level rise, as a subsequent impact of climate change, are also examined.
Author: Shaobing Peng
Publisher: Int. Rice Res. Inst.
ISBN: 3540589066
Category : Nature
Languages : en
Pages : 379
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Book Description
Issues of global climate change; Emission of greenhouse gases; Ultraviolet-B radiation; Carbon dioxide and temperature; Simulation modeling.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This project produced detailed data on the processes that affect methane and nitrous oxide emissions from rice agriculture and their inter-relationships. It defines the shifting roles and potential future of these gases in causing global warming and the benefits and tradeoffs of reducing emissions. The major results include: 1). Mechanisms and Processes Leading to Methane Emissions are Delineated. Our experiments have tested the standard model of methane emissions from rice fields and found new results on the processes that control the flux. A mathematical mass balance model was used to unravel the production, oxidation and transport of methane from rice. The results suggested that when large amounts of organic matter are applied, the additional flux that is observed is due to both greater production and reduced oxidation of methane. 2). Methane Emissions From China Have Been Decreasing Over the Last Two Decades. We have calculated that methane emissions from rice fields have been falling in recent decades. This decrease is particularly large in China. While some of this is due to reduced area of rice agriculture, the bigger effect is from the reduction in the emission factor which is the annual amount of methane emitted per hectare of rice. The two most important changes that cause this decreasing emission from China are the reduced use of organic amendments which have been replaced by commercial nitrogen fertilizers, and the increased practice of intermittent flooding as greater demands are placed on water resources. 3). Global Methane Emissions Have Been Constant For More Than 20 Years. While the concentrations of methane in the atmosphere have been leveling off in recent years, our studies show that this is caused by a near constant total global source of methane for the last 20 years or more. This is probably because as some anthropogenic sources have increased, others, such as the rice agriculture source, have fallen. Changes in natural emissions appear small. 4). Nitrous Oxide Emissions From Rice Fields Increase as Methane Emissions Drop. Inundated conditions favor anaerobic methane production with high emission rates and de-nitrification resulting in modest nitrous oxide emissions. Under drier conditions such as intermittent flooding, methane emissions fall and nitrous oxide emissions increase. Increased nitrogen fertilizer use increases nitrous oxide emissions and is usually accompanied by reduced organic matter applications which decreases methane emissions. These mechanisms cause a generally inverse relationship between methane and nitrous oxide emissions. Reduction of methane from rice agriculture to control global warming comes with tradeoffs with increased nitrous oxide emissions. 5). High Spatial Resolution Maps of Emissions Produced. Maps of methane and nitrous oxide emissions at a resolution of 5 min x 5 min have been produced based on the composite results of this research. These maps are necessary for both scientific and policy uses.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 925107920X
Category : Technology & Engineering
Languages : en
Pages : 139
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Book Description
Greenhouse gas emissions by the livestock sector could be cut by as much as 30 percent through the wider use of existing best practices and technologies. FAO conducted a detailed analysis of GHG emissions at multiple stages of various livestock supply chains, including the production and transport of animal feed, on-farm energy use, emissions from animal digestion and manure decay, as well as the post-slaughter transport, refrigeration and packaging of animal products. This report represents the most comprehensive estimate made to-date of livestocks contribution to global warming as well as the sectors potential to help tackle the problem. This publication is aimed at professionals in food and agriculture as well as policy makers.
Author: Reiner Wassmann
Publisher: Springer Science & Business Media
ISBN: 9401008981
Category : Science
Languages : en
Pages : 391
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Book Description
Rice production is affected by changing climate conditions and has the dual role of contributing to global warming through emissions of the greenhouse gas methane. Climate change has been recognized as a major threat to the global environment. Because of insufficient field data, rice-growing countries face a problem when trying to comply with the United Nations Framework Convention on Climate Change stipulations to compile a national inventory of emissions and to explore mitigation options. Given the expected doubling in rice production in Asia, the need to evaluate the interaction between climate change and rice production is critical to forming a sound basis for future directions of technology developments by policy makers, agriculturists, environmentalists, rice producers, and rice consumers. The present book comprises two sections. The first part documents a comprehensive overview of the results achieved from an interregional research effort to quantify methane emission from major rice ecosystems and to identify efficient mitigation options. This research report broadens understanding of the contribution of rice cultivation to methane emissions and clarifies that emissions are relatively low, except in specific rice ecosystems, and that these high emissions could be ameliorated without sacrificing yield. The second section shows results from other projects that investigated the role of rice cultivators in field and laboratory approaches. The findings represent inputs for future modeling approaches in the role of rice cultivators. The expanded database generated by other projects is reflected in modeling efforts.
Author: Martin Gummert
Publisher: Springer Nature
ISBN: 3030323730
Category : Agriculture
Languages : en
Pages : 199
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Book Description
This open access book on straw management aims to provide a wide array of options for rice straw management that are potentially more sustainable, environmental, and profitable compared to current practice. The book is authored by expert researchers, engineers and innovators working on a range of straw management options with case studies from Vietnam, the Philippines and Cambodia. The book is written for engineers and researchers in order to provide them information on current good practice and the gaps and constraints that require further research and innovation. The book is also aimed at extension workers and farmers to help them decide on the best alternative straw management options in their area by presenting both the technological options as well as the value chains and business models required to make them work. The book will also be useful for policy makers, required by public opinion to reduce greenhouse gas emissions and air pollution, looking for research-based evidence to guide the policies they develop and implement.
Author: Mark Liebig
Publisher: Academic Press
ISBN: 012386898X
Category : Technology & Engineering
Languages : en
Pages : 602
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Book Description
Global climate change is a natural process that currently appears to be strongly influenced by human activities, which increase atmospheric concentrations of greenhouse gases (GHG). Agriculture contributes about 20% of the world's global radiation forcing from carbon dioxide, methane and nitrous oxide, and produces 50% of the methane and 70% of the nitrous oxide of the human-induced emission. Managing Agricultural Greenhouse Gases synthesizes the wealth of information generated from the GRACEnet (Greenhouse gas Reduction through Agricultural Carbon Enhancement network) effort with contributors from a variety of backgrounds, and reports findings with important international applications. - Frames responses to challenges associated with climate change within the geographical domain of the U.S., while providing a useful model for researchers in the many parts of the world that possess similar ecoregions - Covers not only soil C dynamics but also nitrous oxide and methane flux, filling a void in the existing literature - Educates scientists and technical service providers conducting greenhouse gas research, industry, and regulators in their agricultural research by addressing the issues of GHG emissions and ways to reduce these emissions - Synthesizes the data from top experts in the world into clear recommendations and expectations for improvements in the agricultural management of global warming potential as an aggregate of GHG emissions
Author: International Rice Research Institute
Publisher: Int. Rice Res. Inst.
ISBN: 9711041901
Category : Cropping systems
Languages : en
Pages : 287
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Book Description
Overview; Morphology and physiology of rice ratoons; Rice ratooning in practice; Evaluation and potential of rice ratooning; Cultural practices; Genetics and varietal improvement.
Author: M. O. Andreae
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 376
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Book Description
Microbiological basic of NO and N2O production and consumption in soil; Factors controlling NOx emissions from soils; Control of methane production in terrestrial ecosystems; Biological sinks of methane; What regulates production and consumption of trace gases in ecosystems: biology or physicochemistry?; Regional extrapolation of trace gas flux based on soil and ecosystems; Regional extrapolation: Vegetation-atmosphere approach; Global-scale extrapolation: a critical assessment; Aircraft-based measurements of trace gas fluxes; Extrapolation of flux measurements to regional and global scales; Chamber and isotop techniques; Micrometeorological techniques for the measurement of trace gas exchange; Methane flux measurements: methods and results; Fluxes of NOx abovesoil and vegetation; What are the relative roles of biological production, micrometeorology, and photochemistry in controlling the flux of trace gases between terrestrial ecosystems and the atmosphere?; Atmospheric deposition and nutrient cycling; Global climate and trace gas composition: from atmospheric history to the century; Experimental design for studying atmosphere interactions; Trace gas exchange and phsical climate: Critical interactions; Research priorities for studies on trace gas exchange.
Author: B. A. M. Bouman
Publisher: Int. Rice Res. Inst.
ISBN: 9712202194
Category : Rice
Languages : en
Pages : 59
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Book Description
