The effect of feeding increasing inclusion of extruded Brassica juncea canola expeller on growth performance and nutrient digestibility in weaned pigs

Feeding Brassica juncea or Brassica napus canola meal at increasing dietary inclusions to growing-finishing gilts and barrows

“…The total glucosinolate level in B. napus CM fed in our trial (5.9 mol/g) was greater than the Canadian average of 3.9 mol/g (Rogiewicz et al, 2012). The glucosinolate level in B. juncea CM fed in our trial (12.3 mol/g) was greater than levels observed by Landero et al (2013;10.8 mol/g), Zhou et al (2014a;10.9 mol/g) and Le et al (2014;10.9 mol/g), but lower than levels observed by Collins et al (2011;15.9 mol/g) and Zhou et al (2013;12.5 mol/g). The main glucosinolates were progoitrin for B. napus and gluconapin for B. juncea.…”

“…The decreased carcass dressing in pigs fed B. juncea compared to B. napus CM in this trial could be due to a slight increase in the weight of the liver and thyroid in response to greater glucosinolate intake. Glucosinolate levels in B. juncea CM fed in our trial were greater than those observed in other recent experiments (Landero et al, 2013;Zhou et al, 2014a;Le et al, 2014). High glucosinolate intake increased liver weight in chickens (Woyengo et al, 2011) and liver and thyroid weight in pigs (Bourdon and Aumaître, 1990;Corino et al, 1991;Schöne et al, 1996).…”

“…However, lysine content was similar in the B. napus and B. juncea CM fed in this trial, whereas it is usually lower in B. juncea CM than B. napus CM (Bell et al, 1998;Le et al, 2012;Trindade Neto et al, 2012). The lysine content of B. juncea CM fed was higher than that observed by others (Collins et al, 2011;Landero et al, 2013;Le et al, 2014;Zhou et al, 2013Zhou et al, , 2014a.…”

Rapeseed napin and cruciferin are readily digested by poultry

“…Thus, the poor digestibility or allergenicity of rapeseed protein is considered as a negative factor in the nutritional value of rapeseed co-products either in animal feeds or human diets (Wanasundara, 2011). However, in contrast to many investigations reporting a low digestibility value of CP and amino acids in RSM (Adedokun et al, 2008;Zhou et al, 2013;Kozlowski and Jeroch, 2014;Le et al, 2014;Li et al, 2015), a recent growth performance trial testing RSM resulted in a very similar rates of body weight gain to the control non-rapeseed diet when evaluated in non-ruminants (Parr et al, 2015). This suggests that protein rich co-products might have a good nutritional quality.…”