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Dufey P.-A.,Institute For Nutztierwissenschaften Int | Messadene J.,Institute For Lebensmittelwissenschaften Ilm | Silacci P.,Institute For Nutztierwissenschaften Int
Agrarforschung Schweiz | Year: 2016

Whey is present in large quantities in the alpine-cheese production zones, and represents a source of energy that should be utilised. The quality of the meat from 96 beef cattle which either consumed or did not consume this by-product was compared in two trials carried out 2012 and 2013. The animals, with an average live weight of 480 kg, consisted half of heifers and half of steers, belonged to different breeds or crosses of beef breeds, and were fattened for 95 days in mid-mountain areas. The animals were allocated to one of three experimental treatments: grazing (G), or grazing with an energy supplement in the form of barley (B) or warm, full-fat whey (W) distributed in a limited quantity (2012) or ad libitum (2013). Distributed at an average rate of 25 or 33 litres per day and animal, whey did not affect the sensorial and physicochemical properties of the meat. The fatty-acid profile of interest was only very slightly modified by the feeding treatment. Breed had a much more pronounced impact on the full set of variables. Meat from animals that consumed whey was 100% identifiable via a multivariate analysis including certain fatty acids. © 2016, A M T R A - Association pour la Mise en Valeur des Travaux de la Recherche Agronomique. All rights reserved.


Gabioud Rebeaud S.,Institute for Food science | Gasser Agroscope F.,Institute For Lebensmittelwissenschaften Ilm
European Journal of Horticultural Science | Year: 2015

Two new tools for better preservation of fruit quality have been developed in recent years, the treatment of apples with 1-MCP and dynamic controlled atmosphere storage (DCA). The effect of 1-MCP treatment and DCA on ethylene production and quality of ‘Golden Delicious’ apples harvested at two different ripening stages was evaluated in our study over two consecutive years. 1-MCP treatment delayed the climacteric increase of ethylene production and led to better retention of quality during RA- and ULO-storage and subsequent shelf life compared to non-treated apples. In order to achieve the optimum effect of 1-MCP, the treatment must be carried out within 7 days after harvest, as recommended by the supplier of 1-MCP. In most cases, DCA improved quality retention during storage in terms of fruit firmness and acidity compared to ULO-storage. The use of the two methods depends on the cul-tivars stored and conditions such as the infrastructure of the storage facility and type of handling and marketing of the apples. © ISHS 2015.


Kopf-Bolanz K.,Hochschule fur Agrar | Bisig W.,Institute For Lebensmittelwissenschaften Ilm | Jungbluth N.,ESU services GmbH Okobilanzierung und Beratung | Denkel C.,Hochschule fur Agrar
Agrarforschung Schweiz | Year: 2015

Each year, 1300000 tons of whey occur in Switzerland as a by-product of cheesemak-ing: 24% is used in the food industry, 31% is transformed into high-value animal feed and 45% is fed directly to pigs. Increasing the percentage made into foodstuffs would be desirable but is difficult to realize because production is scattered and concentrating the many small amounts of whey is transport intensive. Moreover, the composition of the whey varies according to the type of cheese manufactured, which complicates processing and makes it difficult to obtain milk protein powder with constant properties. Producing «ideal» whey would allow circumventing the problem but would require changing the cheese production processes. The economic impact of such a step has not yet been calculated. Estimates of the environmental impact can be positive or negative depending on the protein concentration and the lactose removal. Only little is known about the associations that the word «whey» evokes for consumers, and a strategy allowing to increase the amounts consumed remains to be defined. © 2015, AMTRA - Association pour la Mise en Valeur des Travaux de la Recherche Agronomique. All rights reserved.


Schweizer S.,Institute For Pflanzenbauwissenschaften Ipb | Neumann L.,Institute For Obstbau | Braun P.,Institute For Obstbau | Kuttnig S.,Institute For Lebensmittelwissenschaften Ilm | And 2 more authors.
Agrarforschung Schweiz | Year: 2014

Crop-load management is a vital cultural measure in apple-growing. Only when the number of fruits per tree corresponds to target crop-load levels do yield and quality match over the years. Crop load is influenced by various factors, and is deliberately reduced through thinning measures. The necessary intensity of thinning, however, is difficult to gauge, since the process must take place before the physiological fruit drop is over in early summer. Three approaches to early forecasting of crop load were refined, adapted and evaluated on fruit plots in Switzerland, Germany, Austria and Italy: fruit-growth measurement according to D.W. Greene; determination of the material composition of the fruit by means of near-infrared spectroscopy; and carbon-balance modelling (MaluSim). According to the investigations, fruit drop is not induced at a specific time, but can be induced repeatedly. Because of this, with the current state of developments, the quality and reliability of the forecasts were insufficient for application in practice. Nevertheless, the estimation of the expected effectiveness of a thinning treatment which can be derived using the carbon balance from MaluSim is promising, and would allow the dosage for the treatment to be specially adapted to the conditions in question. © 2014, AMTRA - Association pour la Mise en Valeur des Travaux de la Recherche Agronomique. All right reserved.

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