Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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The poultry and pig sector in Argentina : husbandry practice and animal welfare
Horne, P.L.M. van; Wagenberg, C.P.A. van; Winter, M.A. de; Hoste, R. ; Senesi, S.I. ; Barilatti, M.M. ; Daziano, M. ; Martino, L.D.C. ; Becerra, M.M.T. - \ 2010
The Hague : LEI Wageningen UR (Report / LEI : Research area Agriculture & entrepreneurship ) - ISBN 9789086154098 - 79
pluimveehouderij - pluimveebedrijf - varkenshouderij - dierenwelzijn - argentinië - dierhouderij - poultry farming - poultry industry - pig farming - animal welfare - argentina - animal husbandry
This report gives an overview of the current husbandry and management practices in the poultry and pig sector in Argentina related to animal welfare. The research centered on a description of the broiler, layer and pig sector in Argentina, the regulatory framework in force in Argentina with respect to animal welfare and a survey on husbandry practice in the poultry and pig sector.
Analytical pyrolysis and thermally assisted hydrolysis and methylation of EUROSOIL humic acid samples: a key to their source
Buurman, P. ; Nierop, K.G.J. ; Kaal, J. ; Senesi, S.I. - \ 2009
Geoderma 150 (2009)1-2. - ISSN 0016-7061 - p. 10 - 22.
soil organic-matter - gas chromatography/mass spectrometry - mass-spectrometry - molecular composition - chemical-composition - c-13 nmr - gc/ms - substances - vegetation - products
Humic acids have been widely investigated by spectroscopic methods, especially NMR and FTIR, and they are known to show significant differences according to their origin. Low resolution methods such as NMR and FTIR, however cannot easily distinguish different input sources or establish relations between SOM chemistry and vegetation or land use in general. High resolution methods, such as analytical pyrolysis and pyrolysis combined with methylation do offer such possibilities. Therefore, HAs from five reference soils called the Eurosoils, including a Vertic Cambisol (E1, Italy), a Rendzina (E2, Greece), a Dystic Cambisol (E3, Great Britain), an Orthic Luvisol (E4, France) and an Orthic Podzol (E5, Germany), that were previously characterized a.o. by NMR, FTIR and ESR, were also analyzed by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermally assisted hydrolysis and methylation (THM) and subsequent analysis by GC/MS. The Orthic Podzol sample showed the largest aliphaticity, and the strongest degradation of aliphatics and lignin. The Dystric Cambisol featured the least decomposed HA, which was reflected by a large content of long-chain alkanes, and little lignin degradation. Both the Dystric Cambisol and the Orthic Luvisol HAs contained a significant amount of microbial organic matter. Polyaromatics, which indicate the presence of charred material, were most abundant in the Vertic Cambisol and the Podzol HAs and lowest in the Dystric Cambisol and the Rendzina HAs. THM was able to distinguish between the various vegetations/land uses. Although quantifications by NMR and py-GC/MS are essentially different, the general results largely coincided. NMR appears to underestimate aromaticity and overestimate aliphaticity, but a molecular mixing model yielded reasonable correlations between NMR and pyrolysis data. Classification by `degradation state¿ based on py-GC/MS largely coincided with acidity determined by titration, but FTIR data did not coincide. Py-GC/MS, with its much larger resolution, is a better tool to distinguish effects of vegetation, microbial input, and degradation. HA's produce the same variety of compounds upon pyrolysis as total SOM extracts and are therefore chemically not more simple than SOM. HA chemistry, however can be understood in the light of land use history and SOM dynamics
Do food quality assurance systems demand complex governance structures?
Ordonez, H.A. ; Zuurbier, P.J.P. ; Senesi, S.I. ; Palau, H. - \ 2006
- 13 p.
In recent years, several agrifood crises broke out in various countries of Europe, in the US, Japan, Canada and also in Argentina. Consumers are consequently much more concerned now about what they eat. In view of such events, consumers in wealthy industrialized countries began to demand food origin and quality assurance. In order to respond to the new situation, companies have designed certifications to assure food quality and safety. As quality certifications are incorporated to foods, the specificity of the assets rises, and market is not the best option to govern the transactions. Based on this theory, it is possible to ask, ¿Do food quality assurance systems demand complex governance structures?¿ This paper describes three certifications ¿Organics, GAP and Hereford Beef¿ in Argentina, identifying institutional, organizational, technological and market aspects and the main governance structures in these systems. The conclusion is that, although the theory indicates that more complex governance structures ¿such as hybrid forms¿ are required, of the three certifications studied, only Hereford Beef develops contracts or netchains with producers and stakeholders, while the others do not generate these complex and formal forms of governance structures
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