Miranda N. Smit, Xun Zhou, José L. Landero, Malachy G. Young, and Eduardo Beltranena. Copyright Alberta Agriculture and Forestry

Transcription

1 Increasing hybrid rye substitution level for wheat grain with or without enzyme on growth performance and carcass traits of grower-finisher barrows and gilts. Miranda N. Smit, Xun Zhou, José L. Landero, Malachy G. Young, and Eduardo Beltranena

2 New European hybrid rye: More resistant to ergot & fusarium Greater yield/unit land; Introduction Lower content of anti-nutritional factors; Greater non-starch polysaccharides (NSP) content in rye: May benefit from NSP enzyme inclusion. % Rye Wheat Total NSP Arabinose Xylose Glucose Uronic acid 7.2 <2.8

3 Introduction Feeding 60% rye to grow-finisher did not affect performance; Need to be validated in Western Canada under commercial environment; Objective: Test effects of increasing hybrid rye inclusion by replacing wheat grain and the effect of NSP enzyme inclusion on: Growth performance; Carcass traits; Feed cost.

4 Materials and Methods Drumloche Research Barn 2 Rooms; 52 pens in each room; 6 feed bins per room;

5 Test barn: Materials and Methods 1008 test pigs; 48 pens, 21 pigs per pen; Housed by gender; 4 recovery pens; 0.7m 2/ pig; Started 44kg of BW; Wet-dry feeder; Extra drinker; Feed Logic feeding unit.

6 Design: Materials and Methods 3 x 2 x 2 factorial design; 3 substitution levels of rye (Low, medium, high); 2 levels of enzymes (0 or 0.02%); 2 genders; Pigs blocked by gender and initial BW; 8 replicate pens per treatment; Analysis: Proc mixed in SAS; Fixed terms: Rye level, enzyme, gender; Random term: Block; Block Barrow Block Gilt Block Barrow Block Gilt Block Barrow Block Gilt Block Barrow Block Gilt

7 Ingredient sources: Materials and Methods Wheat: Mainly soft wheat 10-11% protein; Some CPS and small chance of Hard Red Spring; Grown within km radius of Irma, AB; Rye: Hybrid variety developed by KWS LOCHOW GMBH (Bergen, Germany); Grown at Kalco Farms near Gibbons, AB; Enzymes: Endofeed WDC (GNC Bioferm, Bradwell, SK); Containing 1400 units/g β-glucanase; 4500 units/g xylanase; Inclusion level of 200 mg/kg.

8 Ingredient specs: Formulation: Materials and Methods RM code SFM004 SFM112 Name Wheat 11% CP Rye 9.9% CP DM CP EE ASH NDF ADF STARCH TOT NE GFL STTD P SD LYS SD M+C SD THR SD TRP Analysed Wheat Rye Batch average Starch Crude protein NDF ADF Crude fibre Ash Crude fat Potassium Phosphorus Magnesium Chloride Calcium Sodium

9 Diets Materials and Methods Grower 2 Grower 3 Finisher 1 Finisher 2 Rye inclusion Rye inclusion Rye inclusion Rye inclusion Low Med High Low Med High Low Med High Low Med High Wheat Rye wddgs Peas Canola oil L-Lys Others NE Mcal/kg SID Lys/NE Others: Limestone, Mono-cal, Salt, DL-Met, L-Thr, Phytase, Feeder Micro.

10 Measurements: Materials and Methods Pig weights every 2 weeks; Feed remaining; Market weight; Carcass: Cost: Backfat; Loin depth; Weight; Index; Income over feed cost.

11 Body weight, kg d 0 d 22 d 42 d 63 d 76 Shipping P<0.05 ~1kg heavier in low rye diet Low Medium High No enzyme Enzyme d 0 d 22 d 42 d 63 d 76 Shipping

12 ADFI, kg P<0.001 P<0.001 P<0.001 z z zy z y y z y y Overall Grower 2 Grower 3 Finisher 1 Finisher 2 Overall Grower 2 Grower 3 Finisher 1 Finisher 2 Low Medium High No enzyme Enzyme

13 ADG, kg P<0.05 P<0.05 P<0.01 P<0.01 z zy z y z z y z zy y y y Overall Grower 2 Grower 3 Finisher 1 Finisher 2 P=0.08 Overall Grower 2 Grower 3 Finisher 1 Finisher 2 Low Medium High No enzyme Enzyme

14 GF, kg:kg Overall Grower 2 Grower 3 Finisher 1 Finisher 2 Overall Grower 2 Grower 3 Finisher 1 Finisher 2 Low Medium High No enzyme Enzyme

15 Carcass traits Carcass Wt, kg Dressing, % Backfat, mm Loindepth, mm Lean yield, Days Revenue, $ g/kg Low Medium High No enzyme Enzyme 0 Carcass Wt, kg Dressing, % Backfat, mm Loindepth, mm Lean yield, g/kg Days Revenue, $

16 Wheat $190/MT Rye $180/MT x P<0.001 y z Feed cost/kg feed, $ Feed cost/kg gain, $ P<0.001 P<0.05 Feed cost/kg feed, $ Feed cost/kg gain, $ Cost Feed cost/pig, $ IOFC, $ P<0.05 Feed cost/pig, $ IOFC, $ Low Medium High No enzyme Enzyme

17 Summary Increasing substitution level of rye: Reduced overall ADG, ADFI; Did not affect feed efficiency, carcass traits; Did not affect feed cost/kg gain, feed cost/pig, and IOFC; Enzyme inclusion: Had a trend to improve overall ADG; Improved feed efficiency in high rye diets; Reduced feed cost/kg gain and feed cost/pig.

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19 Increasing hybrid rye substitution level for wheat grain with or without enzyme on growth performance and carcass traits of grower-finisher barrows and gilts. Miranda N. Smit, Xun Zhou, José L. Landero, Malachy G. Young, and Eduardo Beltranena