| Effect of limit feeding high- and low-concentrate diets with Saccharomyces cerevisiae on digestibility and on dairy heifer growth and first-lactation performance. | |
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MedLine Citation:
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PMID: 19762828 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Growth and digestibility were examined for heifers limit fed high- (HC; 60%) and low-concentrate (LC; 20%) diets with or without yeast culture (YC) addition in 2 experiments. A third experiment was undertaken to monitor first-lactation production of heifers limit fed HC or LC diets. In experiment 1, 32 Holstein heifers were individually fed at controlled intakes for 133 d to maintain a targeted average daily gain of 0.80 kg/d for all 4 treatments [HC; LC with and without Saccharomyces cerevisiae; Yea-Sacc(1026) (Alltech Inc., Nicholasville, KY), 1 g/kg as fed]. Targeted average daily gain was achieved for all treatments during the individual feeding period (0.80 +/- 0.01 kg/d). Average dry matter intake needed to maintain constant gain was slightly reduced for HC and YC treatments. Reduced dry matter intake and similar targeted average daily gain resulted in a tendency for improved feed efficiency of HC-fed heifers. Skeletal measurements and targeted average daily gain were not affected by concentrate level or YC. The objective of experiment 2 was to elucidate effects of concentrate level and YC on nutrient digestibility. Four young (284.35 +/- 4.51 d) and 4 older (410.28 +/- 2.14 d) heifers were allocated to the 4 treatments used in experiment 1. Heifers fed the HC diet had increased dry matter digestibility (75.67 vs.72.96 +/- 0.72%), and YC addition increased dry matter digestibility (74.97 vs. 73.65 +/- 0.71%). Intake of N and apparent N digestibility were similar for all treatments. High-concentrate diets and YC addition decreased wet and dry matter output of feces. Urine excretion was not different; therefore, total manure output was lower for HC-fed heifers as compared with LC-fed heifers. Results suggest that HC diets can improve feed efficiency without affecting growth when limit fed to dairy heifers. Yeast culture increased dry matter digestibility in HC- and LC-fed heifers; HC diets were more digestible and reduced fecal output, with YC enhancing this effect. In experiment 3, heifers from experiment 1 were group fed the same diets (HC or LC) without YC until parturition, and milk production was measured through 154 d of lactation. Group-fed average daily gain was not different between treatments (HC = 1.11 vs. LC = 1.04 kg/d, SE = +/-0.06 kg/d). Heifers fed the HC and LC diets calved at 23.50 and 23.79 +/- 0.50 mo, respectively. Peak milk was lower and there was a tendency for reduced daily milk and protein yield for primiparous cows fed HC diets from 8 mo of age to the dry/prefresh period (long term), but predicted yields of milk and components were similar in the first 154 d of lactation. |
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Authors:
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G J Lascano; G I Zanton; F X Suarez-Mena; A J Heinrichs |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 92 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-09-18 Completed Date: 2009-12-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 5100-10 Citation Subset: IM |
Affiliation:
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Department of Dairy and Animal Science, The Pennsylvania State University, University Park 16802, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aging Animal Feed / economics Animals Cattle / growth & development*, physiology Costs and Cost Analysis Diet* / economics Digestion / physiology* Feces Female Lactation / physiology* Milk Proteins / analysis Nutritional Requirements Pregnancy Saccharomyces cerevisiae* Weight Gain |
| Chemical | |
Reg. No./Substance:
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0/Milk Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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