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Dissertation
The role of ligneous vegetation for livestock nutrition in the sub-Sahelian and Sudanian zones of West Africa: Potential effects of climate change
(2012-12-07)
Climate change and variability in sub-Saharan West Africa is expected to have negative consequences for crop and livestock farming due to the strong dependence of these sectors on rainfall and natural resources, and the low adaptive capacity of crops farmers, agro-pastoralist and pastoralists in the region. The objective of this PhD research was to investigate the anticipated impacts of expected future climate change and variability on nutrition and grazing management of livestock in the prevailing extensive agro-pastoral ...
Dissertation
Status and Potential of Smallholder Livestock Production Systems in Xishuangbanna, southern P.R. China
(2013-01-23)
With Chinas rapid economic development during the last decades, the national demand for livestock products has quadrupled within the last 20 years. Most of that increase in demand has been answered by subsidized industrialized production systems, while million of smallholders, which still provide the larger share of livestock products in the country, have been neglected. Fostering those systems would help China to lower its strong urban migration streams, enhance the livelihood of poorer rural population and provide ...
Dissertation
Effects of mild water restriction on digestion and nitrogen metabolism in a desert adapted goat breed
(2017-04-26)
Water is the main challenge facing animal husbandry in arid and semi-arid regions of the globe. These areas are characterized by a long dry season lasting between 6 and 8 months. At certain times during the long dry period, water can be so scarce that animals may face severe water shortages. Many studies have been conducted to highlight how ruminants cope during these times of severe water deprivation. Yet, livestock are much more often exposed to mild water shortages for several months in a year. Only a few studies ...
Dissertation
Prevalence of intestinal parasites in small ruminants and their senstivity to treatments with ethnobotanical remedies in Cholistan, Pakistan
(2013-10-16)
Livestock production contributes substantially to the livelihoods of poor rural farmers in Pakistan; strengthening pastoral communities plays an imperative role in the country’s thrive for poverty alleviation. Intestinal helminths constitute a major threat for pastoral livestock keepers in the whole country because chronic infestation leads to distinct losses in livestock productivity, particularly the growth of young animals. Synthetic anthelmintics have long been considered the only effective way of controlling ...
Dissertation
Effects of Different Feeding Regimes on the Digestibility and Faecal Excretion of Nitrogen, Soluble Carbohydrates and Fibre Fractions in Water Buffaloes kept under Subtropical Conditions
(2010-11-12)
In the course of the ‘Livestock Revolution’, extension and intensification of, among others, ruminant livestock production systems are current phenomena, with all their positive and negative side effects. Manure, one of the inevitable secondary products of livestock rearing, is a valuable source of plant nutrients and its skillful recycling to the soil-plant interface is essential for soil fertility, nutrient - and especially phosphorus - uses efficiency and the preservation or re-establishment of environmentally ...
Dissertation
Strukturanalytische Untersuchungen und Bewertung schadstoffhaltiger Abfälle im Hausmüll
(2006-04-03)
Produkte mit Sonderabfällen sind im privaten täglichen Gebrauch in allen Lebensbereichen in vielfältiger Form anzutreffen. Per Gesetz sind die Vorgaben für die vom Hausmüll getrennte Erfassung, Verwertung bzw. schadlose Beseitigung von Sonderabfällen in den entsprechenden Bundes- bzw. Landesgesetzen sowie durch Rechtsvorgaben der EU geregelt. Dennoch werden erhebliche Mengen an Sonderabfällen über den Hausmüll entsorgt. Exakte Daten liegen hierzu allerdings bisher nicht vor.
Vor diesem Hintergrund beabsichtigt die ...
Dissertation
The Suppressive Nature of Compost against Pythium spp: evaluation of compost-based applications in two host pathogen systems using bioassays and molecular fingerprinting
(2018-08-14)
The suppressive effect of composts on soil-borne plant pathogens has been widely reported in the scientific literature. However, the role of the compost microbiome, in this respect, is still not well understood. The general goal of this research was the molecular-biological characterisation of the microbiomes of two compost types within the host-pathogen system Pythium ultimum and cucumber, thereby contributing to understanding the role of the microbial structure of the chosen composts in this specific system. An ...
Dissertation
Agrobiodiversity through evolutionary plant breeding – System specific adaptation of agronomic and morphological traits and effective populations size in composite cross populations of winter wheat
(2018-02-05)
Der Schwerpunkt der vorliegenden Arbeit ist die Beschäftigung mit Züchtungsmethoden, die eine Erhöhung der Agrobiodiversität mit sich bringen, außerdem werden die Auswirkungen diversifizierter Anbausysteme betrachtet.
Dissertation
Effects of fertilizer type and rate on partitioning of soil organic matter into pools of different stability
(2010-05-26)
Type and rate of fertilizers influence the level of soil organic carbon (Corg) and total nitrogen (Nt) markedly, but the effect on C and N partitioning into different pools is open to question. The objectives of the present work were to:
(i) quantify the impact of fertilizer type and rate on labile, intermediate and passive C and N pools by using a combination of biological, chemical and mathematical methods;
(ii) explain previously reported differences in the soil organic matter (SOM) levels between soils receiving ...
Dissertation
Effects of tillage on processes of organic matter sequestration
(2010-06-28)
To increase the organic matter (OM) content in the soil is one main goal in arable soil management. The adoption of tillage systems with reduced tillage depth and/or frequency (reduced tillage) or of no-tillage was found to increase the concentration of soil OM compared to conventional tillage (CT; ploughing to 20-30 cm). However, the underlying processes are not yet clear and are discussed contradictorily. So far, few investigations were conducted on tillage systems with a shallow tillage depth (minimum tillage = ...