Browsing Fakultät für Agrarwissenschaften (inkl. GAUSS) by Title
Now showing items 847-866 of 926
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Unobserved heterogeneity in productivity analysis of panel data: applications to meat chain firms and global growth in agriculture
(2015-03-04)Production analysis matters in agricultural economics because technology shapes developments in agriculture as well as in related sectors, such as the food industry. Pro- ductivity and technical efficiency (TE) are key ... -
Unternehmenszusammenschlüsse in der Milch- und Zuckerindustrie unter wettbewerbsrechtlichen und ökonomischen Gesichtspunkten
(2003-02-14)This study shows an overview about investigations in the field of mergers and acquisitions of agribusiness companies (milk and sugar) and examines the trade off effect between efficiency ... -
Untersuchung exogener Einflüsse auf den Reproduktionserfolg des Rindes unter Anwendung von In-vitro-Verfahren
(2020-06-03)This thesis deals with the analysis of various exogenous factors on the reproductive suc-cess of cattle by application of in vitro methods. Possible effects of semen type (conventional vs. female sexed) and calf ... -
Untersuchung von Indikatoren zur Einschätzung des Risikos einer Subakuten Pansenazidose bei Milchkühen auf Praxisbetrieben
(2025-04-23)Feeding of high-yielding dairy cows in the beginning of lactation is a major challenge due to high energy requirements and reduced dry matter intake at the same time. This leads to diets with a high level of rapidly ... -
Untersuchung zur Gestaltung von Zuchtprogrammen in der Legehennenzucht
(2005-12-27)The primary objective of the present study was to analyse the conventional layer breeding. Among others, inbreeding, selection response, different selection and mating strategies were ... -
Untersuchungen auf wasserlösliche Kohlenhydrate, Ertragsleistung und Inhaltsstoffe bei Futtergräsern zur Verbesserung der Verdaulichkeit
(2008-07-29)High sugar perennial rye-grass are new varieties from that an improved fodder quality an especially enhanced digestibility is expected. The aim of this study was to determine experimentally ... -
Untersuchungen und Kalkulationstabellen zur Schätzung der N2-Fixierleistung und der N-Flächenbilanz beim Anbau von Lupinus albus und Lupinus luteus in Reinsaat und von Vicia faba und Pisum sativum in Reinsaat und im Gemenge mit Avena sativa
(2003-12-15)In 1999 a three year lasting field experiment with different crop legumes from one to four species on four varying field sides in Lower Saxony was started. In detail Vicia faba, Pisum sativum ... -
Untersuchungen über die Eignung beiochemischer und molekulargenetischer Marker für eine Identifizierung von verschiedenen Störarten und deren Hybriden
(2001-11-07)The goal of this thesis was to explore the potential of different biochemical and molecular markers to discriminate different sturgeon species. Blood samples were collected from the ... -
Untersuchungen verschiedener Einflussfaktoren auf Gesundheit und Produktivität beim Schaf
(2011-06-06)The breeding of healthy, resistant lambs with good weight gain is most important for shepherds. Basis for this is a good, natural breeding by the ewe, a gentle weaning method and a potential parasite resistance respectively ... -
Untersuchungen von klimatischen Einflüssen auf die Gesundheit und Milchleistung von Milchkühen in Niedersachsen
(2013-07-30)Global warming will intensify heat stress for dairy cows. Particularly, heat stress affects animal welfare and health negatively. It is widely unknown to which extent different housing systems can alter this stress. ... -
Untersuchungen zu Auftreten von Clostridium botulinum, betriebsspezifischen Risikofaktoren und Symptomen beim Krankheitsbild des viszeralen Botulismus
(2012-04-27)Within a case-control-study influencing factors and typical symptoms were identified in order to detect and reduce the risk of this livestock disease. For these purposes a questionnaire was developed, which included three ... -
Untersuchungen zu Wachstumsleistungen von Warmbluthengsten in der Aufzucht unter besonderer Berücksichtigung der Protein- und Aminosäurenversorgung
(2015-03-09)The purpose of the feeding experiment was to evaluate the influence of nutrient supply on the growth performances of growing colts, aged 11 to 27 months, with balanced energy and varied protein composition. The animals ... -
Untersuchungen zum Blatt- und Wurzelmetabolismus sowie zum Phloem- und Xylemtransport in Zusammenhang mit der Stickstoff-Effizienz bei Raps (Brassica napus L.)
(2000-12-13)In order to analyse how N assimilation, phloem and xylem transport and seed protein accumulation affect the N efficiency of oilseed rape (Brassica napus L.), these features were ... -
Untersuchungen zum Einfluss ausgewählter Faktoren auf die in vitro-Verdaulichkeit von Silomais und auf Parameter der Pansenphysiologie
(2001-08-10)Digestibility is an important parameter concerning the quality assessment of maize cultivars. In some European countries it already became a criteria with regard to the assessment for ... -
Untersuchungen zum Einfluss melktechnischer Parameter auf die Zitzenkondition von Milchkühen
(2011-06-08)Numerous studies deal with the effects of teat condition on mastitis matters. There is no doubt that pour teat condition increases the risk of mastitis. Studies that look at the interactions ... -
Untersuchungen zum Einfluss verschiedener fortpflanzungssteuernder Maßnahmen auf die Fruchtbarkeitsleistung von Jung- und Altsauen unter Großbestandsbedingungen
(2008-04-25)The thesis describes the literature on biotechnological interventions in reproduction and the resulting reproductive performance for large swine farms. The purpose of the investigation was to analyze the role ... -
Untersuchungen zum Infektionsmodus, immunologischen Nachweis und zur biologischen Bekämpfung von Leptosphaeria maculans (Desm) Ces. & de Not., dem Erreger der Wurzelhals- und Stängelfäule an Winterraps (Brassica napus L.)
(2002-04-02)109 bacterial and 19 fungal antagonists of Leptosphaeria maculans (Anamorph Phoma lingam), the causal agent of blackleg on oilseed rape, were isolated from compost and rhizosphere of ... -
Untersuchungen zum leistungsabhängigen Bedarf an Lysin, Methionin/Cystin und Threonin von Nil-Tilapien auf Grundlage der Aminosäure-Wirksamkeit in ausgewählten Proteinträgermischungen
(2005-01-05)The objective of this investigation was to determine the amino acid efficiency of lysine, methionine/cystine and threonine in different mixtures of protein sources as a basis for the derivation of the amino acid requirement ... -
Untersuchungen zum ruminalen Biotinumsatz beim Rind
(2006-01-11)The aim of this study was to investigate in systematic examinations with the rumen simulation technique RUSITEC and in vivo with cows cannulated in the proximal duodenum whether ... -
Untersuchungen zum Threoninstoffwechsel bei Laborratten und Küken in Abhängigkeit von der Protein- und Threoninversorgung
(2001-11-21)Aim of this research was to determine the effects of different supply of crude protein (CP), threonine (Thr) and glycine (Gly) on threonine dehydrogenase activity (TDG activity) in the liver ...