WorldCat Identities

Flessa, Heinz

Works: 45 works in 69 publications in 2 languages and 388 library holdings
Genres: Conference papers and proceedings  Academic theses 
Roles: dgs, Editor, Other, Author, Contributor, htt
Publication Timeline
Most widely held works by Heinz Flessa
From leaf to soil - Nitrogen partitioning and stabilization in soil organic matter by Carolin Bimüller( )

1 edition published in 2014 in English and held by 30 WorldCat member libraries worldwide

Der Rotmilan (Milvus milvus) im Unteren Eichsfeld by Nicole Wasmund( )

2 editions published in 2013 in German and held by 28 WorldCat member libraries worldwide

In the present study were examined population density, habitat use and composition, young bird rearing, food and predation on Red Kite (Milvus milvus). Essential questions were how stable is the stock in the area and what causes could there be for the decrease previously suspected. In essence, the hypothesis was tested that the lack of food is the essential component that caused the Germany-wide decline of red kites since 1990 (NICOLAI/ MAMMEN 2009). Study area was the bird sanctuary EU SPA V19 (Unteres Eichsfeld) with an area of 13,710 hectares. The study period lasted from 2009 until 2012
Effects of nutrient cycling through litter of different broadleaved deciduous tree species on soil biochemical properties and the dynamics of carbon and nitrogen in soil by Christina Langenbruch( )

2 editions published between 2012 and 2013 in English and held by 23 WorldCat member libraries worldwide

Tree species influence soil chemical properties via the input of nutrients and protons through throughfall, stemflow, litterfall, and root respiration and/ or exudation. The effect of conifers versus hardwood trees on soil properties, such as beech (Fagus sylvatica L.), has often been investigated. More recent studies have focused on the influence of different broadleaved tree species on soil properties, and it was found that different broadleaved tree species may significantly influence soil properties, such as the C and N storage. However, most studies compared different mono-species stan
Studie zur Vorbereitung einer effizienten und gut abgestimmten Klimaschutzpolitik für den Agrarsektor( Book )

1 edition published in 2012 in German and held by 23 WorldCat member libraries worldwide

Die THG-Emissionen des Agrar- und Ernährungsbereiches einschließlich des vorgelagerten Bereiches, Verarbeitung und Handel und inklusive Landnutzung und Landnutzungsänderungen betragen etwa 20% der Gesamtemissionen in Deutschland. Vor diesem Hintergrund sollen in einer Studie für das Land Niedersachsen (a) die Minderungspotentiale der relevanten Maßnahmen für den Agrarsektor und (b) die damit verbundenen Kosten (THG-Minderungseffizienz in EUR/Tonne CO2eq) ermittelt werden, um daraus Vorschläge für Handlungsoptionen und Politikmaßnahmen zur THG-Minderung in der niedersächsischen Land- und Ernährungswirtschaft abzuleiten. Die Analyse ist dazu bestimmt, die effizientesten Klimaschutzaktivitäten zu ermitteln. (Quelle: vTI)
Progress in plant nutrition : plenary lectures of the XIV International Plant Nutrition Colloquium by W. J Horst( )

3 editions published in 2002 in English and held by 22 WorldCat member libraries worldwide

These papers include two lectures which address the role of Plant Nutrition in the sustainability of agro-ecosystems and the production of enough high quality food to feed the growing world population. Recent advances in Plant Nutrition are reviewed in the 11 papers presented in each of the Symposia devoted to: genetics and molecular biology of Plant Nutrition, nutrient functions, the role of the apoplast in mineral nutrition, plant quality and plant health, salinity and plant-soil-water relations, mineral element toxicity and resistance nutrient acquisition, soil organisms/plant interactions, fertiliser use in relation to optimum yield and environment, nutrient dynamics in natural and agro-ecosystems, and plant nutrition and sustainable development. Current knowledge and research emphasis in these areas of the subject is well illustrated and the reader is provided with a comprehensive view of the state of Plant Nutrition research
Gross N2O fluxes across soil-atmosphere interface and stem N2O emissions from temperate forests by Yuan Wen( )

2 editions published in 2017 in English and held by 20 WorldCat member libraries worldwide

Obwohl Distickstoffmonoxid (N2O) zu den Nebenbestandteilen der Atmosphäre zählt, ist es doch von großer Bedeutung. Es hat signifikanten Einfluss auf die Physik und Chemie der Atmosphäre und beeinflusst damit das Klima auf der Erde. Der Boden ist eine wichtige N2O-Quelle, mit mikrobieller Nitrifikation und Denitrifikation als bestimmende Prozesse der N2O-Produktion. Boden-N2O-Flüsse zeigen gewöhnlich hohe räumlich-zeitliche Variabilität, denn mikrobielle Prozesse von N2O-Produktion und -Verbrauch sind jeweils von der Substratverfügbarkeit, dem Redoxpotential und der Temperatur abhängig. Auch
Determination of the denitrification capacity of unconsolidated rock aquifers using 15N tracer experiments at groundwater monitoring wells - development of a new method to assess actual and future denitrification in aquifers by Wolfram Eschenbach( )

2 editions published in 2014 in English and held by 19 WorldCat member libraries worldwide

The nitrogen cycle is one of the most important nutrient cycles in terrestrial ecosystems and has been dramatically altered by increasing anthropogenic inputs of reactive nitrogen (Nr) to terrestrial ecosystems. Nitrate (NO3- ) emissions from the agricultural sector are the dominant source of Nr fluxes to aquatic systems like aquifers and NO3- pollution of groundwater is a problem due to eutrophication of surface waters receiving polluted groundwater, possible indirect emissions of nitrous oxide (N2O) and increasing costs for keeping the standard for NO3- in drinking water. Denitrification i
Freisetzung und Verbrauch der klimarelevanten Spurengase N2O und CH4 beim Anbau nachwachsender Rohstoffe( Book )

2 editions published in 1998 in German and held by 19 WorldCat member libraries worldwide

Land-use Control on Abiotic and Biotic Mechanisms of P Mobilization by Deejay Sabile Maranguit( )

2 editions published in 2017 in English and held by 17 WorldCat member libraries worldwide

Phosphorus (P) is the most limiting nutrient for plant growth and productivity in many regions worldwide especially in the tropics. Aside intrinsic low P availability controlled by physicochemical and biological reactions, erosion and yield harvest are also very crucial in P depletion. These processes are massively intensified through anthropogenic activities, such as land-use change, the predominant global change of this century due to increasing population and food demand. Land-use change in consequence, affects P mobilization directly or indirectly through major modification of soil prop
Redoxprozesse in Böden in der Nähe von wachsenden und absterbenden Pflanzenwurzeln by Heiner Flessa( Book )

4 editions published between 1990 and 1991 in German and Undetermined and held by 16 WorldCat member libraries worldwide

Plant nutrition : food security and sustainability of agro-ecosystems through basic and applied research by W. J Horst( )

3 editions published between 2001 and 2002 in English and held by 16 WorldCat member libraries worldwide

The world's population is expected to reach 8 billion by 2025 and most of this growth in population will occur in developing countries. To feed the world with such a marked increase in population, a great improvement in food production must be achieved particularly in these countries. To meet this challenge, present agricultural productivity must be increased on the cultivated land. However, in many developing countries, particularly in Africa, reduced soil fertility caused by continuous cropping with low nutrient input and the resultant nutrient mining of soils is a major threat both to food production and to ecosystem viability. As a result of declining soil fertility, together with increasing population pressure, expansion of crop production to marginal lands and forested areas contribute to the destruction of natural ecosystems. Food production is not only a quantitative challenge. Improving the nutrient status of plants provides a further valuable means of enhancing food quality and is of extreme benefit to the health of both plants and humans. There are several excellent examples showing that plants with optimum nutrient status are better adapted to biotic and abiotic stress factors. Because of population pressures, many global food systems are not currently providing enough micronutrients to ensure adequate micronutrient intakes in the human diet. This has resulted in an increasing prevalence of micronutrient deficiencies that now afflicts over three billion people worldwide
Nitrous oxide emissions from arable soils - Effect of long-term tillage and identification of production and consumption processes using stable isotope approaches by Anja Sielhorst( )

2 editions published between 2014 and 2015 in English and held by 15 WorldCat member libraries worldwide

Eine Hauptquelle des vom Menschen verursachten klimaschädlichen Distick-stoffoxids (N2O), das auch Lachgas genannt wird, sind landwirtschaftliche Böden. Im Hinblick auf die ansteigende Weltbevölkerung ist mit einer Erhöhung der landwirtschaftlichen Produktion zu rechnen - mit weitreichenden Auswirkungen auf den Stickstoffkreislauf. Allerdings sind noch immer nicht alle Stickstoffflüsse und Umbauprozesse in Böden bis ins Detail verstanden, im Speziellen die Denitrifikation als einer der Schlüsselprozesse. Bei der Denitrifikation wird Nitrat (NO3- ) über Ni
Trace gas fluxes and belowground carbon allocation in tropical montane forest soils of Southern Ecuador = Spurengasflüsse und unterirdische Kohlenstoffspeicherung in den Böden tropischer Bergregenwälder Südecuadors by Katrin Wolf( )

1 edition published in 2011 in English and held by 14 WorldCat member libraries worldwide

Tropical forest soils are important sources of the greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O), and of nitric oxide (NO), a precursor of ozone production. They are also sinks for the greenhouse gas methane (CH4). Estimates on soil trace gas fluxes and on carbon cycling from tropical forest soils are heavily biased towards lowland forests. Limited data is available on trace gas exchange from tropical montane forest (TMF) soils and their carbon cycle has only been marginally explored, although TMFs cover approximately 9% of the tropical forest area. This dissertation presents the results of a comprehensive study on soil CO2, N2O, NO, and CH4 exchange and possible biogeochemical regulators, with a special focus on the influence of nutrient availability in TMFs of southern Ecuador. Soil CO2, N2O and CH4 fluxes were determined using static closed chambers and gas chromatographic analysis at three sites along an elevation gradient from 1000 m to 3000 m (1000 m, 2000 m, 3000 m) and along topographic gradients (lower slope, midslope, ridge), . NO fluxes were measured in the field using open dynamic chambers and a LMA-3D NO2 Analyzer with chemiluminescence detection. To determine the potential atmospheric CH4 uptake of different soil substrates, a laboratory incubation experiment using organic
Nitrous oxide from fungal denitrification - Pure culture and soil studies using stable isotope and microbial inhibitor approaches by Lena Rohe( )

2 editions published in 2014 in English and held by 14 WorldCat member libraries worldwide

The trace gas nitrous oxide (N2O) contributes to climate change as well as to the depletion of the ozone layer in the stratosphere. Agricultural soils account for about 70% of the high anthropogenic N2O emissions. Microbial processes in soil use, for instance fertilizer N to produce N2O, are an important factor. An understanding of N2O production pathways is imperative to evaluate reliable mitigation methods for N2O emissions. The present study focused on denitrification, which, besides nitrification and nitrifier denitrification, is on
Origin and regulation of soil N2O and NOx fluxes from coniferous and deciduous temperate forests exposed to chronic high N depositions by Nadine Eickenscheidt( )

1 edition published in 2012 in English and held by 13 WorldCat member libraries worldwide

Nitrogen (N) cycling in Europe and in many other parts of the world has been massively accelerated as a result of agricultural and industrial activities in the last decades. As a consequence, forest ecosystems have been exposed to increasing deposition rates of reactive N, which may increase soil N availability. Increased N availability in turn may alter nitrous oxide (N2O) and nitric oxide (NO) emissions, which play a major role in atmospheric chemistry and contribute to global warming. Several studies reported that European temperate forests receiving chronic high N depositions are important sources for N2O and NO. Despite high research efforts in the last two decades, there is still insufficient knowledge about the importance of N depositions and forest type on N oxide fluxes from temperate forest soils. Therefore, the objectives of the present study were (i) to investigate the origin of N oxide emissions from temperate forest soils exposed to chronic high N depositions and to quantify the contribution of N depositions and turnover of leaf litter N to N2O emissions and (ii) to determine the factors that regulate N oxide fluxes in temperate forest soils with special regard to the impact of forest type and soil gas diffusivity
Dynamik und räumliche Muster forstlicher Standorte in Deutschland : Ergebnisse der Bodenzustandserhebung im Wald 2006 bis 2008( )

2 editions published in 2016 in German and English and held by 7 WorldCat member libraries worldwide

Der Zustand der Waldböden hat begonnen, sich seit der ersten Bodenzustandserhebung (BZE I) in den 1990er Jahren langsam zu erholen. Ursache hierfür ist in erster Linie die Minderung der atmosphärischen Einträge insbesondere von Schwefel (S) und Blei (Pb) im Rahmen der grenzüberschreitenden Maßnahmen zur Luftreinhaltung. Zudem sind viele Böden aus Gründen des Bodenschutzes gekalkt worden und in den letzten 20 Jahren hat ein Umbau von Nadelwald-Reinbeständen zu Laub- und Mischbeständen stattgefunden. Beide Maßnahmen haben ebenfalls insgesamt positive Wirkungen auf den Waldboden. Basis für die Auswertungen der BZE waren deutschlandweit 1.900 Inventurpunkte. Die Außenaufnahmen der zweiten Bodenzustandserhebung (BZE II) fand von 2006 bis 2008, die Analytik von 2009 bis 2010 statt.
Studie zur Vorbereitung einer effizienten und gut abgestimmten Klimaschutzpolitik für den Agrarsektor by Heinz Flessa( )

3 editions published in 2012 in German and Undetermined and held by 7 WorldCat member libraries worldwide

Studie zur Vorbereitung einer effizienten und gut abgestimmten Klimaschutzpolitik für den Agrarsektor( Book )

1 edition published in 2012 in German and held by 6 WorldCat member libraries worldwide

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Plant nutrition : food security and sustainability of agro-ecosystems through basic and applied research
Plant nutrition : food security and sustainability of agro-ecosystems through basic and applied research
Alternative Names
Flessa, H. 1961-

Flessa, Heiner 1961-

English (22)

German (14)