Nutritional Evaluation of Forage Barley Varieties

Transcription

1 Nutritionl Evlution of Forge Brley Vrieties Presented to the 2017 Ssktchewn Beef Industry Conference Regin, Ssktchewn y J. Nir 1, T. McAllister 2, A. Bettie 1, P. Yu 1, D. Christensen 1, J. McKinnon 1 1 University of Ssktchewn, Ssktoon, SK. 2 Agriculture nd Agri-Food Cnd, Lethridge, AB.

2 Generl introduction Whole crop rley Principl forge source for feedlot nd diry opertions in western Cnd >250 vrieties (CFIA 2013) Tremendous vrition mong vrieties Feed/mlting; 2 row/6 row; Hulled/hulless; smooth/rough wn Imge courtesy: google imges

3 Brley Silge Gret del of gronomic informtion on growing rley Mny growers focus on yield potentil Qulity focus tends to come from optiml hrvest nd ensiling mngement Limited informtion on feed qulity of the vrious rley vrieties for silge

4 Forge NDF content: 40 70% (Undersnder 2012). Brley silge typiclly 40 to 50% NDF oregonstte.edu/ns312 NDF digestiility vries mong forges nd mong vrieties within forges. Higher NDF digestiility Diry cttle Higher DMI Higher milk production Higher vilility of dietry energy (O nd Allen 1999; Hoffmn nd Coms 2004)

5 High NDFD rley silge vrieties to growing/finishing cttle could potentilly Increse DMI Replce rley grin for silge without ffecting performnce Higher digestiility = higher ville dietry energy Improve rumen ph Limited informtion ville on effect of NDFD of rley vrieties on performnce of eef cttle

6 Phse 1 Phse 2 Phse 3 Phses Evlution of the Nutritionl nd Neutrl Detergent Fier Digestiility Chrcteristics of Brley Forge Vrieties Commonly Grown for Silge in Western Cnd Evlution of rley vrieties vrying in NDF digestiility nd level of inclusion in the diet on feedlot performnce, rumen fermenttion, pssge rte nd totl trct digestiility chrcteristics Further evlution of effects of vriety nd stge of mturity of rley forge on NDF digestiility nd nutritionl chrcteristics over multiple crop yers

7 Nutritionl evlution of common rley vrieties grown commercilly for silge in western Cnd Cn. J. Anim. Sci. 96:

8 Mterils nd Methods 135 silge smples over 2 yers Selected 80 smples t mid-dough stge 7 vrieties represented in oth yers Anlyzed for nutrients plus, ph, VFA, lctte, mmoni, NDF digestiility

9 Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Xen 2 row 2 row 2 row 6 row 6 row 2 row 2 row Smooth wn Rough wn Rough wn Smooth wn Smooth wn Rough wn Rough wn Feed nd mlting type Mlting type Feed type Feed type Mlting type Mlting type Feed type Imge courtesy:

10 CP, % DM Effect of vriety of rley for silge on CP content (P < 0.01) c c c c c Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

11 ADF, % DM Effect of vriety of rley for silge on ADF content (P < 0.01) Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

12 NDF, % DM Effect of vriety of rley for silge on NDF content (P < 0.01) c c c c c Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

13 Strch, % DM Effect of vriety of rley for silge on strch content (P < 0.01) Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

14 TDN, % Effect of vriety of rley for silge on TDN content (P < 0.01) Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

15 NDFD 30h, % NDF Effect of vriety of rley for silge on 30-h NDFD (P < 0.01) c d cd Conlon Copelnd Cowoy Flcon Legcy AC Metclfe Vriety of rley Xen

16 % NDF Effect of vriety of rley for silge on NDF pool (P < 0.01) 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% c c c c c Conlon c Copelnd Cowoy Digestile NDF c Flcon Legcy AC Metclfe Indigestile NDF c c Xen *Digestile NDF clculted s DNDF = 100-INDF

17 Conclusions Brley vrieties grown for silge in western Cnd were inherently different in terms of chemicl composition nd digestiility prmeters Cowoy hd gretest ADF nd NDF contents nd lowest strch content Cowoy hd the highest 30 hr NDFD nd gretest DNDF content Question does the greter NDFD 30h of Cowoy offset the greter fire nd lower strch content in terms of niml performnce?

18 Phse 2 Effect of NDF digestiility nd level of inclusion of rley vrieties grown for silge on performnce nd crcss qulity of growing nd finishing eef cttle Cn. J. Anim. Sci. (2016, ccepted)

19 Mterils nd Methods Brley vrieties selected sed on NDFD 30h results from Phse 1 Cowoy (High, 37.0%) Copelnd (Intermedite, 31.1%) nd Xen (Low, 28.8%) Seeded, treted, hrvested nd ensiled similrly Animls 288 crossred wened steers (680 ls) 24 pens 6 per tretment with 12 hed per pen Trget slughter weight (1375 ls)

20 Tretments Diets Cowoy Copelnd Xen LOW HIGH LOW HIGH LOW HIGH Bckgrounding Silge Brley grin Bromegrss hy Cnol mel Supplement Finishing Silge Brley grin Cnol mel Supplement

21 % DM Mcl kgˉ¹ DM Effect of vriety of rley for silge on ckgrounding diets ADF NDF Fier frctions in the diet 0.6 NEm NEg Energy vlues Cowoy Copelnd Xen Cowoy Copelnd Xen

22 % DM Mcl kgˉ¹ DM Effect of level of inclusion of rley for silge on ckgrounding diets ADF NDF Fier frctions in the diet 0.6 NEm NEg Energy vlues LOW HIGH LOW HIGH

23 ls ls Effect of vriety of rley for silge on ckgrounding performnce End BW Cowoy Copelnd Xen ADG Cowoy Copelnd Xen

24 ls ls Effect of level of inclusion of rley for silge on ckgrounding performnce End BW 2.2 ADG LOW HIGH LOW HIGH

25 ls ls Effect of level of inclusion of rley for silge on finishing P > 0.05 End BW performnce ADG LOW HIGH LOW HIGH No effect of vriety of rley on finishing performnce

26 Conclusions Brley vrieties vry considerly in terms of chemicl composition nd NDF digestiility Cowoy hd the gretest NDFD 30h (% of NDF sis) of vrieties tested; However, selecting rley vrieties sed on NDFD 30h (% of NDF sis) my not provide consistent results due to gronomic nd environmentl fctors.

27 Conclusions Brley vrieties with greter NDF content will hve negtive effect on performnce of growing cttle Finishing performnce ws improved for steers previously fed high silge inclusion diets during ckgrounding due to compenstory gin nd due to ckgrounding ADG nd BW

28 Acknowledgements Ssktchewn Agriculture Development Fund Cndin Cttlemn s Assocition Ssktchewn Cttlemn s Assocition University of Ssktchewn Diry Smrt Nutrition Cumerlnd Vlley Anlyticl Services Beef nd Diry Producers