The effects of the dietary inclusion of rapeseed meal on the performance of young piglets"

Author(s):  
E.A. Latymer ◽  
A.G. Low ◽  
J.S. Carter ◽  
W.H. Close

While a considerable amount of information is available on the nutritional properties of rapeseed meal for ruminants, there is only limited information on its suitability and nutritive value as a feed ingredient for pigs. The objective of the present study was, therefore, to investigate the effect of feeding isonitrogenous diets containing rapeseed meals of different origins, but which varied in their glucosinolate content, to pigs. Thus, the effect of the level of dietary glucosinolates from rapeseed meal on the voluntary feed intake and performance of young pigs was investigated. Weaned piglets were chosen as the experimental model because of their sensitivity to unpleasant tastes, their high requirements for protein and their rapid response to the antinutritional components of feedstuffs.

1983 ◽  
Vol 50 (3) ◽  
pp. 661-671 ◽  
Author(s):  
Pauline A. Lee ◽  
R. Hill

1. The voluntary food intake, during 30 min periods after morning and afternoon feeds and during 24 h, by growing pigs given diets containing rapeseed meal (Rsm) or soya-bean meal (Sbm) as the only protein supplement was determined. One diet was offered at a time and a daily changeover sequence of feeding was followed.2. Four rapeseed meals were compared, one from seeds of British-grown winter Brassica napus varieties (Brsm) and the others from seeds of the var7ieties Tower (Trsm), Erglu (Ersm) and Span (Srsm). The effects on feed intake of adding flavouring substances to the Brsm diet were also determined. The flavouring substances were molassine meal, sucrose and four commercially-available substances: P, pig nectar; H, hog nectar; S, sow nectar and A, apple.3. Intake of the Brsm diet was significantly less than those of the Sbm, Trsm and Ersm diets.4. Addition to the Brsm diet of molassine meal or sucrose at 50 or 100 g/kg did not improve voluntary feed intake. None of the commercial flavouring substances raised the intake of the Brsm diet to the level of the Sbm diet but they improved intake of the Brsmdiet to varying extents. Flavourings H, S and A gave similar improvements which were substantial.5. The Sbm, Brsm and Trsm diets were each fed ad. lib. to groups of growing pigs continuously for 4 weeks. Weekly feed intakes and weight gains were determined. Feed intakes and weight gains followed closely the intake values obtained in the changeover experiments. The highest values were for the Sbm diet; those for the Trsm diet were slightly lower and those for the Brsm diet were substantially and significantly lower.6. The glucosinolate, sinapine and tannin contents of the rapeseed meals were determined and the results suggested that voluntary feed intake of diets containing these meals was related to their glucosinolate content, but not to their sinapine or tannin contents.


1976 ◽  
Vol 16 (80) ◽  
pp. 372 ◽  
Author(s):  
AT Goold ◽  
MR Taverner ◽  
RW Hodge

Twenty-five pigs, weaned at approximately three weeks of age, were randomly allocated to five dietary treatments containing increasing levels of low glucosinolate rapeseed meal (0, 1.5, 3.0, 6.0, 9.0 per cent) substituted for equal amounts of protein from meat and bone meal. The diets were offered ad libitum and the pigs' performance and digestibility were recorded from approximately 5 to 21 kg liveweight. The level of rapeseed meal in the diet did not significantly affect either the voluntary feed intake, food conversion ratio, growth rate or dry matter digestibility. However, food wastage significantly increased as the level of rapeseed meal in the diet was increased from 1.5 to 9.0 per cent. Food wastage was significantly correlated with the level of rapeseed meal in the diet.


Author(s):  
M. Davis ◽  
M. Al Mammary ◽  
M. Ellis ◽  
R. Smithard

In the United Kingdom, the use of rapeseed products in pig diets is limited, primarily because of the adverse effects of glucosinolates, a group of sulphur containing compounds which yield goitrogenic and toxic compounds on hydrolysis. Varieties of winter oilseed rape (B.napus) are now grown in the EC which have a much reduced level of glucosinolate in the meal. Rapeseed meal (RSM) contains other compounds principally sinapine,tannins and phytate which may reduce the nutritive value of diets into which it is incorporated.The pig trial reported here was designed to determine the effect on growing pig performance of diets containing a range of glucosinolate contents but with a fixed amount of rapemeal. A rat metabolism study was also conducted which was designed to assess the biological value (BV) of the protein in the two rapeseed meals used.


Author(s):  
Isobel C Vincent ◽  
J Thompson ◽  
R Hill

Lambs given ad, libitum, a compound concentrate feed containing a high proportion of a high glucosinolate rapeseed meal gained weight at a significantly lower rate than similar lambs given a concentrate feed based on soyabean meal (Stedman et al, 1983). The glucosinolate content of the concentrate feed containing rapeseed meal was just over 20 µmol/g. In the experiment described here the effects on lamb weight gain and concentrate intake were determined from a range of compound feeds containing the same proportion of rapeseed meal but different glucosinolate contents, to a maximum approaching 20 µmol/g.Two rapeseed meals were used, one of low glucosinolate content (Dolar-DRSM), about 3.5 µmol/g, and the other of high glucosinolate content (autumn UK sown variety - BRSM), about 85 µmol/g. Eight compound concentrate feeds were prepared (Table 1), all containing 0.20 rapeseed meal but having calculated glucosinolate contents of 0 to 17.5 µmol/g. Their ME value was 12.5 MJ and CP 200 g/kg DM. The mineral and vitamin supplement provided 0,8 mg I/kg concentrate feed.


2004 ◽  
Vol 15 (3) ◽  
pp. 246-246
Author(s):  
M.A. Tony ◽  
A. Butschke ◽  
J. Zagon ◽  
H. Broll ◽  
M. Schauzu ◽  
...  

1967 ◽  
Vol 9 (2) ◽  
pp. 149-154 ◽  
Author(s):  
D. J. A. Cole ◽  
J. E. Duckworth ◽  
W. Holmes

1. Voluntary feed intake, performance and carcass quality were studied with 20 individually housed pigs given isocaloric diets (2,770 kcal/kg. DM) containing either 8·9 % or 12·9 % crude fibre in the dry matter over the period of growth from 45 to 91 kg. live-weight.2. There were no significant differences between diets in voluntary feed intake, rate of gain or carcass quality.3. Apparent digestibility coefficients and rates of passage of the diets were determined in eight castrated male pigs. Rates of passage were not significantly affected by diet or live-weight when determined at 57 and 82 kg. live-weight.


1975 ◽  
Vol 55 (1) ◽  
pp. 61-70 ◽  
Author(s):  
J. M. BELL

Five swine experiments were conducted to evaluate rapeseed meal (RSM) of low glucosinolate content (Brassica napus L. cv. Bronowski). Two experiments involved 0, 25, 50, 75 and 100% substitution of either Bronowski meal or regular (B. campestris) meal for soybean meal or fishmeal used in the control diet. One experiment compared ad libitum-fed and partially restricted pigs. Another experiment involved digestibility studies, and the final one involved methionine and lysine supplementation. As the dietary levels of either Bronowski or regular RSM increased in the ration, protein digestion coefficients decreased from 79 and 80% to 76 and 78%, respectively, and energy coefficients decreased from 82% to 79 and 78%, respectively. The protein and energy digestibility coefficients for Bronowski RSM were estimated to be 68 and 59%; for regular RSM, 65 and 54%. With barley–wheat–RSM diets, pigs responded to 0.1% methionine, but not to lysine (P > 0.05). Pigs fed ad libitum consumed more Bronowski than regular RSM diet and performed as well as pigs fed soybean meal diets.


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