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Chemical composition of ingredients used in the experimental diets

 
Ingredients
Item Ground corn Soybean meal Peanut cake Tifton 85 hay
DM, % 94.43 95.76 96.46 85.70
OM, g/kg DM 986.40 920.95 947.60 927.00
CP, g/kg DM 71.00 449.10 445.20 69.60
EE,1 g/kg DM 26.50 20.60 147.10 13.10
NDF,2 g/kg DM 118.40 259.10 176.00 803.50
ADF, g/kg DM 43.90 200.10 155.50 550.90
Lignin, g/kg DM 0.80 2.20 68.50 99.00
Nonfiber carbohydrates, g/kg DM 770.40 200.70 179.10 40.80
NDIN, g/kg CP 17.10 50.00 26.80 7.60
ADIN, g/kg CP 28.50 27.20 19.90 4.10
Estimated TDN,3 g/kg DM 865.00 722.50 782.20 536.50
1EE = ether extract .
2Corrected for ash and protein.
3Total digestible nutrients estimated by the equations described by Detmann et al. (2006a,b,c, 2007).



View Full Table | Close Full ViewTable 2.

Proportions of ingredient and chemical composition of experimental diets with peanut cake replacing soybean meal in diets for feedlot-finished young bulls

 
Rate of substitution of soybeanmeal for peanut cake, %
Item, % 0 33 66 100
Ingredient
Peanut cake 0.00 4.08 8.16 12.23
Soybean meal 12.16 8.10 4.05 0.00
Ground corn 44.88 44.91 44.94 44.91
Premix mineral1 1.52 1.48 1.43 1.43
Urea A/S2 1.43 1.43 1.43 1.43
Tifton 85 hay 40.00 40.00 40.00 40.00
Chemical composition
DM 91.27 91.29 91.32 91.35
Ash 4.39 4.32 4.25 4.18
CP 15.70 15.56 15.42 15.42
EE3 1.96 2.48 3.00 3.51
Total carbohydrates 77.94 77.64 77.33 76.89
NDF4 40.61 40.28 39.95 39.61
ADF 26.44 26.26 26.09 25.91
Nonfiber carbohydrates 38.65 38.59 38.52 38.42
Estimated TDN5 69.07 69.35 69.64 69.88
1Guaranteed values (per kg in active elements): 240.00 g calcium, 174.00 g phosphorous, 1,250.00 mg copper 100.00 mg cobalt, 1,795.00 mg iron, 90.00 mg iodine, 2,000.00 mg manganese, 15.00 mg selenium, 5,270.00 mg zinc, and maximum 1,740.00 mg fluoride.
2Urea and ammonium sulfate at a 9:1 ratio.]
3EE = ether extract.
4Corrected for ash and protein.
5Total digestible nutrients estimated by the equations described by Detmann et al. (2006a,b,c, 2007).



View Full Table | Close Full ViewTable 3.

Nutrient intake of feedlot diets with peanut cake replacing soybean meal in diets for feedlot-finished young bulls

 
Rate of substitution of soybean meal for peanut cake, %
Significance
Item 0 33 66 100 SEM Lin1 Quad2
kg/d
DM, kg/d 10.58 9.67 9.15 8.05 0.245 0.005 0.483
DM, % BW 2.21 2.17 2.06 1.84 0.043 0.004 0.320
DM, g kg BW0.75 102.04 99.71 94.71 84.47 2.085 0.004 0.358
OM, kg/d 9.65 9.28 8.79 7.74 0.235 0.006 0.477
CP, kg/d 1.63 1.48 1.45 1.16 0.047 0.002 0.424
EE,3 kg/d 0.20 0.24 0.28 0.27 0.009 0.003 0.078
NDF,4 kg/d 3.78 3.76 3.34 3.21 0.097 0.022 0.825
NDF,4 % BW 0.83 0.84 0.75 0.74 0.016 0.019 0.699
NDF,4 g kg BW0.75 38.24 38.78 34.56 33.76 0.793 0.019 0.734
NFC,5 kg/d 4.20 3.93 3.83 3.21 0.104 0.002 0.382
TDN, kg/d 6.05 6.11 5.64 5.12 0.145 0.018 0.349
Regression equation
DM, kg/d Ŷ = 10.2037 − 0.0196325X r = 0.94
DM, % BW Ŷ = 2.25003 − 0.00356283X r = 0.91
DM, g/kg BW0.75 Ŷ = 103.792 − 0.173060X r = 0.92
OM, kg/d Ŷ = 9.79399 − 0.0186587X r = 0.94
CP, kg/d Ŷ = 1.64535 − 0.0042809X r = 0.90
EE, kg/d Ŷ = 0.212539 + 0.000737331X r = 0.73
NDF, kg/d Ŷ = 3.82979 − 0.00625205X r = 0.90
NDF, % BW Ŷ = 0.842726 − 0.00105747X r = 0.86
NDF, g/kg BW0.75 Ŷ = 38.8949 − 0.0524384X r = 0.87
NFC, kg/d Ŷ = 4.25576 − 0.00927779X r = 0.90
TDN, kg/d Ŷ = 6.2092 − 0.00972647X r = 0.86
1Linear effect.
2Quadratic effect.
3EE = ether extract.
4Value corrected for ash and protein.
5NFC = nonfiber carbohydrates.



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Nutrient digestibility coefficient (%) of diets with soybean meal substituted for peanut cake from biodiesel production

 
Rate of substitution of soybean meal for peanut cake, %
Significance
Item 0 33 66 100 SEM Lin1 Quad2
DM 57.15 59.57 57.36 59.09 0.937 0.647 0.897
OM 60.00 62.47 60.50 61.97 0.885 0.602 0.818
CP 67.32 70.63 69.23 67.25 1.040 0.878 0.224
EE3 54.00 66.83 63.34 67.12 1.868 0.035 0.259
NDF4 25.80 40.51 35.01 39.48 4.240 0.337 0.574
NFC5 89.57 81.43 80.20 83.28 3.587 0.526 0.442
TDN 60.42 63.55 61.91 63.78 0.897 0.285 0.764
Regression equation
EE Ŷ = 57.1728 + 0.109813X r = 0.60
1Linear effect.
2Quadratic effect.
3EE = ether extract.
4Value corrected for ash and protein.
5NFC = nonfiber carbohydrates.



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Productive performance in feedlot-finished young bulls fed diets containing soybean meal substituted for peanut cake

 
Rate of substitution of soybean meal for peanut cake, %
Significance
Item 0 33 66 100 SEM Lin1 Quad2
Final BW, kg 510.06 497.00 498.62 477.94 5.974 0.082 0.733
ADG, kg 1.41 1.31 1.28 1.04 0.050 0.015 0.524
Feed efficiency 0.134 0.129 0.133 0.125 0.003 0.277 0.703
Regression equation
ADG Ŷ = 1.43138 − 0.0034394X r = 0.89
1Linear effect.
2Quadratic effect.



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Nitrogen balance in feedlot-finished young bulls fed diets containing soybean meal substituted for peanut cake

 
Rate of substitution of soybean meal for peanut cake, %
Significance
Item 0 33 66 100 SEM Lin1 Quad2
Ingested N, g/d 260.80 236.79 232.00 185.60 3.340 0.002 0.424
Feces N, g/d 74.64 76.75 74.62 65.93 3.110 0.484 0.533
Urine N, g/d 51.49 67.59 56.75 37.87 3.121 0.212 0.065
Retained N, g/d 134.67 92.45 100.63 81.80 2.115 0.062 0.073
Nitrogen balance, % 51.44 39.04 43.38 44.07 1.820 0.342 0.224
Urine urea, g/d 11.05 14.50 12.18 8.13 0.670 0.212 0.065
Urine urea N, g/L 4.83 6.81 5.84 3.52 0.365 0.314 0.054
Plasma urea N, g/L 0.22 0.18 0.19 0.15 0.007 0.005 0.903
Regression equation
Ingested N, g/d Ŷ = 263.2900 − 0.693400X r = 0.89
Plasma urea N Ŷ = 0.2167 − 0.0005921X r = 0.87
1Linear effect.
2Quadratic effect.



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Nitrogen microbial and microbial protein synthesis in feedlot-finished young bulls fed with diets containing soybean meal substituted for peanut cake

 
Rate of substitution of soybean meal for peanut cake, %
Significance
Item 0 33 66 100 SEM Lin1 Quad2
Microbial N, g/d 218.83 181.64 235.34 203.78 14.271 0.939 1.000
Uric acid, mmol/d 11.84 13.49 14.62 16.07 0.632 0.101 0.950
Allantoin, mmol/d 280.90 236.76 297.34 259.04 16.595 1.000 1.000
Purine derivatives, mol/d 292.74 250.26 311.96 275.11 16.575 0.945 0.975
Absorbed purines, mol/d 300.98 249.84 323.70 280.29 19.628 0.939 1.000
1Linear effect.
2Quadratic effect.