Documentations

Dietary fatty acid and carcass lean content. What effect on the quality of backfat ?

Supplying polyunsaturated fatty acids in pig diet affects fatty acid composition and technological properties (consistency, oxidability) of adipose tissues. The aim of this study is to evaluate the consequences of…

The effect of lysine/energy ratio on the performance of weaned piglets. Influence of using the post weaning diet up to 40 kg

Three hundred and sixty weaned piglets, with an average body weight of 7.2 kg, were allocated to treatments to determine the optimum ratio of digestible lysine/net energy (digest lys/NE). Four…

A comparison of wet or dry single-space feeders : their effects on growing pig performance, influence of meal or pelleted feed

Four different feeding-systems were compared in three trials :NR-G : dry feeder and pellets — NR-F : dry feeder and meal — NS-G : wet feeder and pellets — NS-F…

Comparison of a simple cereal based diet with two complex isoenergetic diets, through the association of fibre and fat

Three isoenergetic diets differing by their crude fibre content (36, 47 and 58 g/kg) and their fat content (27, 51 and 75 g/kg) were fed to 330 sows which weaned…

Modelling and optimising the Swiss pig breeding scheme. A comparison of the interest of central testing stations in Switzerland and France

In Switzerland the central testing station is currently used to test slaughtered full sibs (2 females and 2 castrates) of onfarm tested boars and sows. The equipment and sanitary status…

Residual food consumption in growing pigs fed ad libitum : method of calculation and genetic variability

Residual food consumption (RFC) in growing pigs represents the deviation of the actual daily food consumption of an animal from its consumption as predicted on the basis of its growth…

Influence of ventilation system and air flow rate on ammonia levels in pig fattening units

The aim of this study was to determine the influence of air flow rate and ventilation system (under or over-floor extraction) on the evolution of ammonia concentrations both inside the…

Influence of increasing ambient temperature on performance of multiparous lactating sows

Sixty-three multiparous Large White sows were used to investigate the effects of five ambient temperature (T) levels (18, 22, 25, 27 and 29°C) and two dietary protein contents (14 and…

Influence of range of diurnal fluctuation of temperature on performance of growing pigs kept at an average ambient temperature of 24°C

The influence of the magnitude of variation of ambient temperature on the performance between 25 and 110 kg live weight was studied in two successive trials, each involving 192 crossbred…

Evolution in the fertilising value of pig slurry during storage pit emptying. Influence of mixing

The aim of the present study was twofold : firstly, to investigate the evolution in the composition of pig slurry in the spreader during the process of emptying the storage…

Optimization of feeding, crops rotation and fertilization in cereal farms with pigs : methodology and results

The evolution of economic environment and law regulations forces pig farms to adapt themselves permanently. One of the issue is the complementarity of productions in farms. For pig farms involved…

Influence of dietary intake on plasma progesterone and embryo mortality in gilts

Nutritional flushing before ovulation augments the ovulation rate whereas increasing the dietary intake after ovulation may increase embryo mortality in gilts. These effects of the plane of nutrition may be…