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Author: Marcus Guderle
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Although root water uptake is an important component in the plant-soil-water relation for single plants and on ecosystem scale, studies investigating the effect of co-existing plant species on community water use have been conducted without estimating root water uptake profiles. However, knowledge of root water uptake is essential for understanding of intra- and interspecific interactions of plants. For those reasons, minimal-invasive and easy to use methods for estimating root water uptake are inevitable. Within this dissertation, an attempt has been made to identify a simple but sufficient accurate method for estimating evapotranspiration and root water uptake profiles from soil water content measurements without a priori information on root distribution parameters. Subsequently, this method was applied to investigate the effect of co-existing plant species on community root water uptake. First, four different complex water balance methods were evaluated regarding their applicability on the ecohydrological issue. Therefore, a synthetic experiment with numerical simulations for a grassland ecosystem was conducted. In the second part, an additional accuracy assessment considering magnitudes of evapotranspiration, soil texture variability, and sensor uncertainty was carried out on 12 weighable lysimeters. Third, we investigated the effect of co-existing plant species on the community root water uptake. Analysis of estimated root water uptake profiles were combined with measurements of leaf water potentials and stomatal conductance, which constitutes the novelty of this thesis. The results indicate that the investigated communities with higher species richness are able to adjust their root water uptake strategy in a way that the water use of the entire community is optimized.
Author: Marcus Guderle
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Although root water uptake is an important component in the plant-soil-water relation for single plants and on ecosystem scale, studies investigating the effect of co-existing plant species on community water use have been conducted without estimating root water uptake profiles. However, knowledge of root water uptake is essential for understanding of intra- and interspecific interactions of plants. For those reasons, minimal-invasive and easy to use methods for estimating root water uptake are inevitable. Within this dissertation, an attempt has been made to identify a simple but sufficient accurate method for estimating evapotranspiration and root water uptake profiles from soil water content measurements without a priori information on root distribution parameters. Subsequently, this method was applied to investigate the effect of co-existing plant species on community root water uptake. First, four different complex water balance methods were evaluated regarding their applicability on the ecohydrological issue. Therefore, a synthetic experiment with numerical simulations for a grassland ecosystem was conducted. In the second part, an additional accuracy assessment considering magnitudes of evapotranspiration, soil texture variability, and sensor uncertainty was carried out on 12 weighable lysimeters. Third, we investigated the effect of co-existing plant species on the community root water uptake. Analysis of estimated root water uptake profiles were combined with measurements of leaf water potentials and stomatal conductance, which constitutes the novelty of this thesis. The results indicate that the investigated communities with higher species richness are able to adjust their root water uptake strategy in a way that the water use of the entire community is optimized.
Author: Meine van Noordwijk
Publisher: CABI
ISBN: 0851996736
Category : Technology & Engineering
Languages : en
Pages : 464
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Book Description
Below-grownd interactions are often seen as the 'dark side' of agroecosystems, especially when more than one crop is grown on the same piece of land at he same time. this book aims to review the amount of light he past decade of research has shed on this topic. It also aims to review ohw far we have come in unravelling the positive and negative aspects of these interactions and how, in dialogue with farmers, we can use the generic principles that are now emerging to look for sita-specifics solutions.
Author: Iván Prieto
Publisher: Frontiers Media SA
ISBN: 2832517927
Category : Science
Languages : en
Pages : 169
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Category : Arboriculture
Languages : en
Pages : 404
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Author: T. Scott Murrell
Publisher: Springer Nature
ISBN: 3030591972
Category : Technology & Engineering
Languages : en
Pages : 466
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Book Description
This open access book highlights concepts discussed at two international conferences that brought together world-renowned scientists to advance the science of potassium (K) recommendations for crops. There was general agreement that the potassium recommendations currently in general use are oversimplified, outdated, and jeopardize soil, plant, and human health. Accordingly, this book puts forward a significantly expanded K cycle that more accurately depicts K inputs, losses and transformations in soils. This new cycle serves as both the conceptual basis for the scientific discussions in this book and a framework upon which to build future improvements. Previously used approaches are critically reviewed and assessed, not only for their relevance to future enhancements, but also for their use as metrics of sustainability. An initial effort is made to link K nutrition in crops and K nutrition in humans. The book offers an invaluable asset for graduate students, educators, industry scientists, data scientists, and advanced agronomists.
Author: Donald N. Zillman
Publisher: OUP Oxford
ISBN: 0191008257
Category : Law
Languages : en
Pages : 546
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Book Description
While energy has been extracted from the ground for two centuries, recent years have seen transformative changes to how easy it is to access underground energy resources. This book investigates the key challenges and legal consequences of recent developments in the use of the subsurface as a source of energy. It provides a comprehensive analysis of the new technologies that have made this possible, such as the extraction of unconventional oil and gas resources through horizontal drilling and hydraulic fracturing, also known as fracking. Further developments include the expanded use of geothermal energy, which has the potential to beome a major renewable energy source. The subsurface can also be utilised for long-term disposal or storage of environmentally harmful by-products of energy use, such as carbon capture and storage (CCS), and disposal of spent nuclear fuel and other nuclear waste. Successful development of these technologies could enhance the use of fossil and nuclear energy by reducing the harm caused by the release of greenhouse gases and harmful radiation. The authors bring together a wide variety of expertise and knowledge to examine the legal implications of the development and control of these underground activities. They provide an invaluable understanding of the legal frameworks applicable to the extraction of underground energy, both at the international level and in a number of important national jurisdictions. Importantly, the book analyses the different regulatory responses to these developments across five continents, and assesses in detail the environmental impact of new energy extraction technologies.
Author: Mines Bureau
Publisher:
ISBN: 9781411341722
Category : Business & Economics
Languages : en
Pages : 282
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Book Description
- Minerals Yearbook, 2014, V. 3: Area Reports: International: Asia and the Pacific. Volume III, Area Reports: International, is published as four separate reports. These regional reports contain the latest available minerals data on more than 180 foreign countries and discuss the importance of minerals to the economies of these nations and the United States. Each report begins with an overview of the region's mineral industries during the year. It continues with individual country chapters that examine the mining, refining, processing, and use of minerals in each country of the region and how each country's mineral industry relates to U.S. industry. Most chapters include production tables and industry structure tables, information about Government policies and programs that affect the country's mineral industry, and an outlook section.
Author:
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 240
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Book Description
Author: Donald L. Sparks
Publisher: Academic Press
ISBN: 0128207647
Category : Science
Languages : en
Pages : 366
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Book Description
Advances in Agronomy continues to be recognized as a leading reference and first-rate source for the latest research in agronomy. Each volume contains an eclectic group of reviews by leading scientists throughout the world. As always, the subjects covered are rich, varied and exemplary of the abundant subject matter addressed by this long-running serial. Includes numerous, timely, state-of-the-art reviews on the latest advancements in agronomy Features distinguished, well recognized authors from around the world Builds upon this venerable and iconic review series Covers the extensive variety and breadth of subject matter in the crop and soil sciences
Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 1016
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