Nutritional composition and digestibility by 80-kg to 100-kg pigs of prepress solvent-extracted meals from low glucosinolate Brassica juncea, B. napus and B. rapa seed and of solvent-extracted soybean meal

. Ileal amino acid digestibility and estimates of endogenous amino acid losses in pigs fed rapeseed meal, sunflower meal and soybean meal. Can. J. Anim. Sci. 80: 495-506. Four commercial samples of rapeseed meal (RSM), four of sunflower meal (SFM) and nine of soybean meal (SBM) were analysed and their ileal N and amino acid (AA) digestibilities in growing pigs were studied. Each batch was tested on four castrated male pigs weighing between 40 and 100 kg and fitted with an end-to-end ileo-rectal anastomosis. True ileal digestibility (TD) of AA was calculated by correcting apparent ileal digestibility (AD) for basal endogenous AA losses, measured by means of a protein-free diet. For RSM and SBM, total endogenous gut AA losses were estimated by a multiple regression model and real ileal digestibility (RD) of AA was calculated. In RSM, average TD of lysine, threonine and methionine were 70.7, 73.2 and 86.0%, respectively. These values were 80.0, 81.8 and 91.9%, respectively in SFM and 90.5, 86.8 and 93.0%, respectively, in SBM. In SBM, TD decreased (P < 0.05) with increases in the ratio of dietary acid detergent fibre (ADF) to AA contents. Expressed as g kg -1 dry matter (DM) intake, total endogenous gut N losses reached 4.7 to 6.4 for RSM and 1.9 to 3.5 for SBM. For SBM, they increased (P < 0.001) with dietary ADF concentration and RD of most AA decreased (P < 0.05) with the increase in the ratio of dietary neutral detergent fibre (NDF) to AA concentrations.

Section: Analytical Characteristicssupporting

confidence: 88%

Ileal amino acid digestibility and estimates of endogenous amino acid losses in pigs fed rapeseed meal, sunflower meal and soybean meal

Jondreville¹,

Broecke²,

Gatel³

et al. 2000

“…(1 DM for DE and NE, respectively (Noblet et al 1993;Bell et al 1998;King et al 2001). This can be ascribed to the lower fibre content of the CM used in this study (205 vs (1 DM, respectively) were obtained in our lab for different meals of yellow-and black-seeded Brassica napus and Brassica junceae, which also present lower dietary fibre content (Montoya and Leterme 2009).…”

Section: Discussion Validation Of the Ne Content Of CM The De And Ne mentioning

confidence: 99%

Validation of the net energy content of canola meal and full-fat canola seeds in growing pigs

Montoya¹,

Leterme²

2010

Montoya, C. A. and Leterme, P. 2010. Validation of the net energy content of canola meal and full-fat canola seeds in growing pigs. Can. J. Anim. Sci. 90: 213Á219. A study was conducted to estimate the net energy (NE) content of canola meal (CM) and full-fat canola seeds (FFCS) in growing pigs, and to validate the results through a growth trial. The digestible energy (DE) content of the canola products was measured in a digestibility study by the difference method, with diets containing two-thirds of a basal diet of known digestibility and one-third of the canola products. The NE content was estimated by means of a prediction equation based on the DE content and chemical composition of the canola products. The NE was 2.43 and 3.56 Mcal kg(1 DM for CM and FFCS, respectively. For the growth study, 31-kg pigs (18 per treatment) were fed for 35 d with wheat/barley-based diets containing either 0, 5, 10 or 15% FFCS or 0, 7.5, 15 or 22.5% CM. The gain-to-feed ratio was unchanged by the levels of CM or FFCS (P!0.05), but the highest level of FFCS decreased feed intake (PB0.001) and thus increased the gain-to-feed ratio (P B0.05). In conclusion, the NE content was correctly estimated for CM, but slightly underestimated for FFCS. Also, growing pigs can tolerate diets containing up to 22.5% CM or 10% FFCS.Key words: Net energy, growing pigs, canola meal, full-fat canola seeds Montoya, C. A. et Leterme, P. 2010. Validation du contenu e´nerge´tique net du tourteau de canola et des graines de canola entie`res pour les porcs d'e´levage. Can. J. Anim. Sci. 90: 213Á219. Les auteurs ont effectue´une e´tude afin d'estimer la teneur en e´nergie nette (EN) du tourteau de canola (TC) et des graines de canola entie`res (GCE) pour les porcs d'e´levage, puis en ont valide´les re´sultats lors d'un essai de croissance. L'e´nergie digestible (ED) des de´rive´s du canola a e´te´e´tablie graˆce a`une e´tude sur la digestibilite´reposant sur la comparaison de rations compose´es aux deux tiers d'une ration de base dont la digestibilite´e´tait connue et au tiers de de´rive´s du canola. La teneur en EN a e´te´estime´e graˆce a`une e´quation de pre´vision fonde´e sur la teneur en ED et sur la composition chimique des de´rive´s du canola. Elle s'e´tablissait respectivement a`2,43 et a`3,56 Mcal par kg de matie`re se`che pour le TC et les GCE. Durant l'essai de croissance, des porcs de 31 kg (18 par traitement) ont rec¸u pendant 35 jours une ration a`base de ble´contenant 0, 5, 10 ou 15 % de GCE, ou 0, 7,5, 15 ou 22,5 % de TC. Le ratio entre le gain de poids et l'ingestion d'aliments ne varie pas avec la concentration de TC ou de GCE (P ! 0,05), mais a`la concentration la plus e´leve´e, les GCE re´duisent l'ingestion d'aliments (P B 0,001), ce qui accroıˆt le rapport gain:aliments (P B 0,05). En conclusion, on a correctement estime´la teneur en EN du TC et le´ge`rement sousestime´celle des GCE. Les porcs en croissance tole`rent une ration contenant jusqu'a`22,5 % de TC ou 10 % de GCE.Mots clé s: É nergie nette, porcs d'e´levage, tourteau de canola...

“…Methionine, cystine and tryptophan levels in Brassica and Sinapis have seldom been reported, but the apparent ranges are 1.7 to 2.0 for methionine, 2.0 to 2.7 for cystine and 0.5 to 1.0% of CP for tryptophan (Miller et al 1962;Mossé and Baudet 1983;Uppström 1995;Bell et al 1997) for B. napus and B. rapa. The corresponding levels of amino acids in B. juncea are 1.3 to 1.9 for methionine, 1.7 to 2.3 for cystine and 0.5 to 1.0% tryptophan.…”

Section: Methodsmentioning

confidence: 98%

Comparisons of amino acid and protein levels in oil-extracted seeds of Brassica and Sinapis species, with observations on environmental effects

Bell¹,

Rakow²,

Downey³

2000

Self Cite

Bell, J. M., Rakow, G. and Downey, R. K. 2000. Comparisons of amino acid and protein levels in oil-extracted seeds of Brassica and Sinapis species, with observations on environmental effects. Can. J. Anim. Sci. 80: [169][170][171][172][173][174]. Seeds from 21 selections of Brassica and Sinapis were analyzed for crude protein (CP; N × 6.25) and amino acid content following oil extraction and grinding. In exp. 1 three cultivars of B. napus, B. rapa and B. juncea were grown in four locations in 4 successive years, with duplicate samples taken from each plot. Brassica juncea contained more CP (P < 0.001) than B. napus or B. rapa (44.6 > 40.1 > 38.8%, respectively). Location affected CP level but not the ranking among cultivars. Year-to-year effects on CP levels (P < 0.001) were of lower magnitude than location effects. Treatments (cultivar, location, year) affected CP and amino acid levels differently. Amino acid levels expressed as percent of CP differed among many cultivars (P < 0.01). Threonine, valine, histidine, lysine and arginine were strongly influenced by location (P < 0.001), as were the dispensable amino acids serine, glutamine and tyrosine. In exp. 2, 10 cultivars and strains grown in one location and in three replicates resulted in greater CP levels in two B. juncea cultivars than in B. napus and B. rapa (42.9 and 43.2 vs. 39.7 and 38.8%), respectively, but lower levels of lysine and threonine in the CP (lysine: 5.4 vs. 6.3; threonine: 3.5 and 3.7 vs. 3.8 and 4.0%). Brassica napus and B. rapa ranked among the lowest in percent CP. In exp. 3, comparisons of eight samples from B. napus, B. rapa and Sinapis alba plots revealed a CP range of 38.1 to 45.0% but differences in amino acid content of the CP were relatively small. L'emplacement agissait sur le niveau de PB, mais pas sur le classement relatif des cultivars. Les effets de l'année (P < 0,001) étaient, cependant, de moindre d'importance que ceux de l'emplacement. Les effets des traitements: cultivar, emplacement, année, sur les acides aminés différaient de ceux observés pour la PB. Les niveaux d'acides aminés exprimés en pourcentage de PB variaient parmi un grand nombre de cultivars (P < 0,01). Les teneurs en thréonine, en valine, en histidine, en lysine et en arginine étaient fortement influencées par l'emplacement (P < 0,0001) de même que les teneurs en acides aminés non essentieles: sérine, glutamine et tyrosine. Dans la deuxième expérience, dix cultivars et une lignée cultivés en 3 répétitions à un emplacement révélaient des teneurs en PB plus fortes chez deux cultivars de B. juncea que chez B. napus et B. rapa, soit respectivement 42,9 et 43,2 contre 39,7 et 38,8%, mais leur proportion respective de lysine et de thréonine dans PB était plus basse, soit 5,4 contre 6,3% pour la lysine et 3,5 et 3,7 contre 3,8 et 4% pour la thréonine. B. napus et B. rapa se situaient au bas de l'échelle pour la teneur en PB. Dans une troisième expérience, une comparaison de 8 échantillons provenant de parcelles de B. napus, B. rapa et Sinapis alba établissait la t...