Evaluating the Adequacy of the CNCPS Model Luis Orlindo Tedeschi Bertha Rueda-Maldonado Francisco “Paco” Juárez-Lagunes.

Presentación del tema: "Evaluating the Adequacy of the CNCPS Model Luis Orlindo Tedeschi Bertha Rueda-Maldonado Francisco “Paco” Juárez-Lagunes."— Transcripción de la presentación:

1 Evaluating the Adequacy of the CNCPS Model Luis Orlindo Tedeschi Bertha Rueda-Maldonado Francisco “Paco” Juárez-Lagunes

2 Mexican dual-purpose lactating cow evaluation

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4 DescripciónEntradaUnidades Tipo de animal2Vacas lechera lactantes Edad66Meses Sexo4Vaca Peso corporal511Kg Raza2Cruzado (doble propósito) Peso maduro550Kg Condición Corporal31 = flaca a 5 = gorda Sistema de cruza2Dos vías Raza de la Madre17Brahman Raza del Padre15Holstein Dias gestante55D Días en lactancia174D Lactación5# Intervalo entre partos13Meses Promedio del Hato2866Kg Producción de leche10Kg/d Grasa en leche3.6% Proteína en leche3.2Kg% Prod. De leche relativa5Escala de 1 a 9 Peso becerro al nacer38Kg Edad al 1er parto33Meses

5 Descripción ambiental AditivoNo Velocidad del viento16Km/h Temperatura previa27ºC Humedad relativa previa80% Temperatura actual28ºC Humedad relativa actual80% Horas luz solar12Horas Exposicion a tormentas1Si Temp. Min. Nocturna18ºC Profundidad del pelo0.6Cm Grosor de la capa1Delgada Cubierta en el pelo1No lodo Animales sofocados1No ActividadPastoreo intensivo

6 BASE DE DATOS

7 Edad % M.sec a FDN, % MS Lig.,% FDN 1 PC, % MS Solubilida d % de PC 2 NNP, % P.Sol 3 PIDN, % PC 4 PIDA, % PC 5 E.E. % MS MIN, % MS FDN disp., %MS 6 FDN no disp., %MS 7 CNE % MS 8 7 13.11 64.4 57.5312.0790.7514.939.253.163.799.9246.3617.959.91 14 19.53 63.1 15.3714.1692.4816.707.524.353.359.8750.2312.739.67 21 16.70 67.1 26.0113.4691.4527.138.554.063.869.4552.7014.276.26 28 13.57 66.1 44.8912.1991.395.568.614.053.929.4654.4011.618.41 35 15.91 69.3 06.069.4091.338.618.675.732.329.9654.7414.489.10 42 19.28 65.7 07.004.9784.122.6915.885.892.698.8248.9016.76 17.8 5 49 20.70 63.5 87.636.8488.4632.4611.543.962.259.6445.2618.26 17.7 4 56 18.45 68.7 07.069.4390.8311.019.175.803.8510.1751.7516.877.93 63 22.23 69.0 27.397.2191.5129.668.497.492.689.6051.2917.69 11.5 3 70 23.19 71.7 57.514.8490.3618.839.6410.310.809.9053.7317.99 12.7 3 77 20.44 71.3 47.676.6290.0932.969.916.490.189.6452.9418.36 12.2 6 96 21.15 72.7 58.114.5088.3336.4811.6712.950.149.6553.2919.44 12.9 9

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13 Digestion Rate of NDF-N in Tropical Forages F.I. Juarez, A.N. Pell, and J.B. Robertson. Cornell University INIFAP

14 Objectives l To measure the NDF-N digestion kinetics of tropical grasses. l To determine the effects of plant maturity and N fertilization on rate and extent of digestion.

15 Table 1. NDF-N x 6.25 content (%CP).

16 Table 2. Effect of fertilization on NDF-N x 6.25 (%CP).

17 Table 3. Effect of Age (days) on NDF-N x 6.25 (%CP).

18 Table 4. NDF-N x 6.25 of 4 tropical grasses (%CP).

19 Table 5. NDF and NDF-N x 6.25 extent of digestion (%).

20 Table 6. NDF and NDF-N x 6.25 rates of digestion (%/h).

21 N Fertilization and CP, NDF and NDF-N x 6.25.

22 Table 8. Effect of Age (d) on CP, NDF and NDF-N x 6.25.

23 CP, NDF and NDF-N x 6.25 of 4 grasses.

24 Conclusions - 1 l NDF-N as % of CP averaged 35 with a range of 10 - 60. l The NDF-N variation was primarily due to species but N fertilization and maturity also were factors.

25 Conclusions - 2 l NDF-N is potentially ruminally available. l Extent and rate of NDF-N digestion is affected by fertilization. l NDF-N was digested faster than NDF.

26 Requirements for accurate prediction in the tropics l Must accurately predict requirements for maintenance, growth, pregnancy, lactation, and energy reserves l Must accurately predict absorbed energy and protein feeds being fed for each specific farm condition l Tabular nutrient requirements and feed values developed in North America are not adequate for the tropics

27 CNCPS for feed management l Develop a model to predict requirements and feed biological values on each farm l Use the model to identify the factors that are first limiting performance –Energy –Protein –Amino acids –Minerals

28 CNCPS components for the tropics l Breed adjustments for maintenance, growth, and lactation l Tropical forages CHO and Protein fractions and digestion rates l Dry matter intake equations l Ruminal adjustment for N and branched-chain amino acids deficiencies

29 Dual-purpose Lactating Cows l Fifty 3/4 Holstein x 1/4 Brahman lactating cows with: –Body weight = 511 kg (550 mature), Condition score = 3, and milk production = 10 kg/d l Rotational grazing Pangola grass and supplemented with 3.5 kg/d of concentrate l From Juarez Lagunes et al. (1999) in J. Dairy Sci. 82:2136

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35 Feed Composition ItemUnitPangola grass Sorghum grain SBM NDF%DM69.510.311.4 Lignin%NDF7.512.80.9 Protein%DM8.910.452.6 SolCP%CP41.914.916.0 NPN%SolCP36.333.055.0 Juarez Lagunes et al. (1999), Table 10

36 Digestion Rates ItemUnitPangola grass Sorghum grain SBM CHO A%/h19.714.37.9 CHO B1%/h19.714.37.9 CHO B2%/h5.36.05.7 Prot. B1%/h135 230 Prot. B2%/h11.06.011.0 Prot. B3%/h5.30.120.20 Juarez Lagunes et al. (1999), Table 10

37 Sensitivity to NDF and Lignin ME milk Kg/d MP milk Kg/d MP Bacteria g/d NDF 1, %DM 6011.37.7685 709.45.7640 807.43.8593 Lignin 2,%NDF 410.56.8668 88.24.6612 1 Lignin = 6% DM. 2 NDF = 70% DM. From Juarez Lagunes et al. (1999), Table 4 Note: ME decreases 1.25 and 0.69 of % units/% of NDF and Lignin increase, respectively

38 Sensitivity to NDF Digestion Rate NDF 1 Dig. Rate ME milk Kg/d MP milk Kg/d MP Bacteria g/d 3%/h5.00415 6%/h9.45.7640 9%/h11.79.9789 1 CHO A and B1 @ 16%/h. Juarez Lagunes et al. (1999), Table 5

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