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Performance of early lactation dairy cows receiving doses of calcium salts of palm oil supplemented or not with lysolecithin.

L. F. Greco

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06-23-2020

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Abstract:

T128
Performance of early lactation dairy cows receiving doses of calcium salts of palm oil supplemented or not with lysolecithin.
D. Machado1, S. L. Antunes1, J. M. dos Santos Neto2, L. F. Greco*3, M. A. P. Meschiatti1, F. A. P. Santos1. 1College of Agriculture Luiz de Queiroz (ESALQ), University of Sao Paulo Piracicaba, SP, Brazil, 2Michigan State University East Lansing, MI, 3Kemin Animal Nutrition & Health division, South America Indaiatuba, SP, Brazil.

Our objective was to evaluate the effects of supplementation with doses of Ca salts of palm oil containing 0 (CSPO) or 1% lysolecithin (CSPOL) on production responses of early lactation dairy cows. Forty-four Holstein � Jersey crossbred cows, 16 primiparous and 28 multiparous, were used in a randomized complete block design. Cows were fed corn silage ad libitum plus 9 kg of concentrate (as fed). The Ca salts (Kemin Industries, Inc.) were incorporated into the concentrates. The experiment lasted 13 wk, from 4 to 16 wk postpartum. Treatments were concentrate with 400 g of CSPO (T1), or concentrates containing 3 levels of CSPOL: 280 g (T2), 340 g (T3), or 400 g (T4). Intake of DM, yields of milk and milk components, BW and BCS were measured for individual cows. Data were analyzed by ANOVA with mixed models using the MIXED procedure of SAS. Preplanned contrasts were: effect of lysolecithin (Lyso, T1 vs. T4), and the linear (L, T2 vs. T4) and quadratic (Q, T3 vs. 1/2 T2 + 1/2 T4) effects of increasing the amount of CSPOL. No interaction between treatment and parity was observed for any of the responses analyzed. Addition of lysolecithin did not affect intake, but increasing the dose of CSPOL tended to reduce forage intake, which affected daily DMI (Table 1). Treatment did not affect yields of milk and milk components or change in BW. We conclude that the Ca salts of palm oil, containing 1% lysolecithin, did not affect milk production and the energy partition in dairy cows.Table 1. Performance of cows supplemented or not with lysolecithin

Item, kg/dTreatmentSEMContrast
T1T2T3T4LysoLQ
Intake
 Silage10.310.810.410.20.20.770.070.13
 DM18.218.618.218.00.20.770.070.13
Milk24.024.624.925.30.90.190.480.86
ECM25.025.625.825.41.10.580.840.85
Fat0.910.950.880.930.030.820.630.13
Protein0.740.750.760.750.030.590.930.90
BW change1.770.651.202.000.80.610.270.41

Keywords: emulsifier, lysolecithin, fat supplementation.