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Feeding Full Fat Soybeans to Cattle

This article explores the benefits of feeding full-fat soybeans to cattle, including their high fat and protein content, as well as the effects of processing. It examines the ruminal metabolism of fat and the impact on carbohydrate degradation. The article also discusses the characteristics of an ideal fat and its digestibility in the intestines. Furthermore, it examines the effects of feeding full-fat soybeans on DM intake, milk production, and milk composition. Additionally, it discusses the nitrogen metabolism and protein requirements of dairy cattle, highlighting the importance of providing protein supplements with high ruminal undegradable protein and good amino acid profiles. The article concludes with observations on the availability of amino acids in oilseeds and the contribution of non-processed and processed oilseeds to dietary protein supply.

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Feeding Full Fat Soybeans to Cattle

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  1. Feeding Full Fat Soybeans to Cattle Sergio Calsamiglia Departamento de Ciencia Animal y de los Alimentos Universidad Autónoma de Barcelona sergio.calsamiglia@uab.es

  2. Soybeans • High fat content • Positive effects on energy supply • Effect of processing • High protein content • Positive effects in protein supply • Effect of processing

  3. Ruminal Metabolism of Fat Fat Glycerol Fatty Acid coo- Saturated Fibrolytic Bacteria Unsaturated

  4. Effect of Feeding Oil on ADF Digestion in the Rumen (Ikwuegbu and Sutton, 1982)

  5. Carbohydrate Degradation Starch Fibre Glucose Pyruvate Lactate Acetate Butyrate Propionate MILK FAT

  6. Factors Affecting Toxicity Fat X Glycerol Fatty Acid coo- Saturated Fibrolytic Bacteria Unsaturated

  7. Effect of FFSB Processing on Free FA (mg/g substrate DM) Reddy et al., 1994

  8. Effect of Type of Processing of FFSB on NDF Degradation in the Rumen Reddy et al., 1994

  9. Characteristics of the Ideal Fat • Ruminal level • In form of tryglicerides (less ruminal effects) • Seed, encapsulated or protected (Ca soap) • Saturated

  10. Intestinal Digestion Triglycerides Emulsion Monoglycerides FA FA FA Absorption Bile salts

  11. Emulsion - Digestion • Fat emulsion is necessary for absorption • Micel foramation is best with short and medium FA • Micel formation is best with unsaturated FA

  12. Degree of Saturation/Unsaturation

  13. Ingestinal Digestibility of Fats NRC, 2001

  14. Energy Value of Fats NRC, 2001

  15. Characteristics of the Ideal Fat • Ruminal level • In form of tryglicerides (less ruminal effects) • Seed, encapsulated or protected (Ca soap) • Saturated • Intestinal level • Medium length • Unsaturated

  16. Partial Summary • Oilseeds have a good FA profile and when supplied as seeds are close to an “ideal fat” • Saturated fats or calcium soaps of FA are viable alternatives, but its intestinal digestibility is low • Due to changes in intestinal digestion, energy values have been recently reevaluated • The energy value of vegetable fats has increased, and that of animal and hydrogenated vegetable fats has dicreased.

  17. Productive Responses • Measures: • DM Intake • Milk Production • Milk Composition • Source of Data: • French: (Chilliard & Ollier, 1994) • USA: (Shaver, 1993) • NRC, 2001 (Allen, 2000)

  18. Effects on DM Intake

  19. Effects on DM Intake

  20. Effects on Production +1,1 kg/d

  21. Effects on Production +0,19 kg/d

  22. Effects on Milk Fat - 0,04%

  23. Effects on Milk Fat - 0,01%

  24. Effects on Milk Protein - 0,05%

  25. Effects on Milk Protein - 0,07%

  26. Preliminary Conclusions: Fat • Fats reduce intake with lower effects in full fats oilseeds, with the exception of FFSB, where intake is not affected • Fats increase milk production • Fats reduce milk fat between 0,04 (animal and protected fats) and 0,01 % (vegetable fats), except FFSB and cottonseed. • All fats result in a slight reduction in milk protein between

  27. Soybeans • High fat content • Positive effects on energy supply • High protein content • Positive effects in protein supply

  28. Oilseeds • High protein content, generally degradable, and with some essential AA (Lys). • The inclusion rate is limitted by the level and quality of the fat fractions.

  29. Nitrogen Metabolism CP NoDeg-N InDig-N Pep - AA Deg-N Bac-N E NH3 Rumen Rec AA Liver Used Protein Urea

  30. Protein Requirements • Ammonia and degradable protein requirements have been defined • True protein is used more efficiently than non-protein N • Requirements are expressed as digestible protein • Some aminoacids have requirements (Lys, Met)

  31. Microbial Protein and Source of Nitrogen Griswold et al., 1996

  32. Aminoacid Supply: CNCPS (Lactation – 17% CP/DM) CNCPS, 2001

  33. Dairy Cattle • As the level of production increases, the deficit of AA also increases • In these conditions, the supply of essemtial AA is important • Therefore, the supply of protein supplements high in rumen undegradable protein, with high intestinal digestibility and good AA profile is important.

  34. Protein Degradation

  35. Intestinal Digestion

  36. Supply of Digestible Protein(g/kg) • FFSB: 39% CP x 20% RUP x 85% ID = 6,63 • Sunflower: 19% CP x 11% RUP x 80% ID = 1,67 • Linseed: 22% CP x 14% RUP x 85% ID = 2,61 • Rapessed: 21% CP x 21% RUP x 50% ID = 2,15

  37. Supply of Digestible Protein (g/d) • FFSB: 6,63% x 2,5 kg = 170 g (EE=20%) • Sunflower: 1,67% x 0,8 kg = 13 g (EE=44%) • Linseed: 2,61% x 1,0 kg = 26 g (EE=36%) • Rapeseed: 2,15% x 0,9 kg = 19 g (EE=40%)

  38. Dietary Protein = Intake Protein (kg/d) x % Ruminal Degradability x % Intestinal Digestibility X % AA

  39. Lysine in Bacteria and Feeds g/100 gAA

  40. Methionine in Bacteria and Feeds g/100 gAA

  41. Dietary Protein = Intake Protein (kg/d) x % Ruminal Degradability x % Intestinal Digestibility X % AA

  42. Available Methionine Seeds

  43. Avalialable Lysine Seeds

  44. Observations • Non-processed oilseeds have a limitted contribution to the supply of dietary AA to the small intestine, buy soybeans are the best option • Processing provides the best added value, but those rich in lysine (as soybeans) have better protection • Becuase the higher inclusion rate, higher protein and high lysine content, FFSB are the best election for processing

  45. Processing and Undegradable Protein

  46. Productive Response c b a

  47. How Much RFFSB in my Diet? (según Knapp et al., 1991)

  48. Typical Diet (% DM, 40 L milk) Alfalfa Hay 10 NEl, Mcal/kg 1.72 Corn Silage 45 CP, % 17 CGF 8 NDF, % 32 Corn 10 f-NDF, % 22 Soybean Hulls 3 NFC, % 38 SBM 5 EE, % 5.5 R-FFSB 9 Rumen pH 6.3 DDGS 6 Lys, %Req 117 MinVit 4 Met, % Req 112

  49. Conclusions • Full Fat Soybeans are an excellent source of energy (fat), rumen degradable protein, • If processed, they are also good sources of undegradable protein and lysine • The recommended level of inclusion depends on total PUFA in the diet: general suggestion: FFSB at maximum of 2,5 kg/animal/day. Extruded (assuming 10% fat), maximum 2-3 kg/animal/day • Soybeans is the best option for processing among other oilseeds

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