Liquid Supplements for Lactating Cows Based on Liquid Streptomyces Solubles and Cane Molasses With or Without Condensed Molasses Solubles
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Keywords

Dairy cattle--Feeding and feeds--Puerto Rico
Feed additives--Puerto Rico

How to Cite

Randel, P. F., & Vallejo, B. (1982). Liquid Supplements for Lactating Cows Based on Liquid Streptomyces Solubles and Cane Molasses With or Without Condensed Molasses Solubles. The Journal of Agriculture of the University of Puerto Rico, 66(1), 11-17. https://doi.org/10.46429/jaupr.v66i1.7635

Abstract

Four groups of 6 Holstein and Brown Swiss cows were used, 2 groups following each treatment sequence of a double-reversal experiment with three 28-day periods. Treatment A employed a liquid supplement of 80% liquid streptomyces solubles and 20% cane molasses, and treatment B, a modification of the same to include 10% condensed molasses solubles (CMS). These were provided free choice to the groups for about 6 hours daily, and replaced an equivalent amount of solid concentrate dry matter (DM), thus reducing individual concentrate allowances, which otherwise were 1 kg per 2.5 kg of milk produced above 5 kg daily. At night all the animals grazed together in pastures of moderate quality. Acceptance of both liquid supplements was excellent and intakes increased throughout the experiment. Overall means (weighing period 2 data doubly) of daily DM intake from supplements A and B were 3.15 and 3.22 kg. Solid concentrate allowances decreased progressively and corresponding mean intakes were only .82 and .83 kg. Milk production declined more rapidly than normal, reflecting a probable oversubstitution of liquid supplements and suboptimal intakes of digestible protein. Respective over-all weighted means for daily milk production were 11.80 and 11.65 kg; and for milk fat percent, 4.11 and 3.99. Various criteria of partial feed conversion efficiency, such as milk/supplemental DM, all slightly favored treatment A (ex., 3.11 vs. 2.96). Cost of total supplements/kg milk was about 8 cents for each treatment. None of the differences between treatments in any of the criteria studied was significant. The addition of 10% CMS to this type of liquid supplement would be a useful method of disposal of this waste product.
https://doi.org/10.46429/jaupr.v66i1.7635
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