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C. H. Noller

Bio: C. H. Noller is an academic researcher from Purdue University. The author has contributed to research in topics: Forage & Silage. The author has an hindex of 15, co-authored 40 publications receiving 807 citations. Previous affiliations of C. H. Noller include United States Department of Agriculture.
Topics: Forage, Silage, Dry matter, Calcium, Dairy cattle

Papers
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C.E. Coppock1, C. H. Noller1, S.A. Wolfe1, C. J. Callahan1, J.S. Baker1 
TL;DR: The mean daily dry matter intake 28 days prepartum did not differ significantly and Digestible energy consumed during the 28 days before calving averaged 155, 138, 159, and 173% of National Research Council's maintenance requirements for the four treatment groups, respectively.

126 citations

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TL;DR: Cows in the latter stages of lactation did not appear to regulate their intake according to physiological requirements for milk production, and cows in the groups fed higher concentrate feeds achieved energy balance earlier.

73 citations

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TL;DR: Sufficient amounts of effective fiber appeared to be present in low NDF and rechopped silage diets to prevent the systemic events leading to milk fat depression but not to prevent a reduction in chewing time.

53 citations

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TL;DR: In two feeding trials lactating dairy cows were fed limestone and in one trial growing dairy heifers were fed magnesium-limestone-buffered rations both limestone and magnesium limestone increased fecal pH, reduced starch losses in the feces, and improved feed efficiency.

45 citations


Cited by
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TL;DR: The system is based on NDF as the measure of total chemical fiber in feeds and Adjustments for the effectiveness of NDF in maintaining milk fat production and optimizing ruminal fermentation are based on the particle size and inherent characteristics ofNDF that affect chewing activity, ruminal pH, and milkfat production.

1,269 citations

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TL;DR: Negative energy balance probably acts similarly to undernutrition and may manifest in delayed ovarian activity by impinging on pulsatile secretion of LH, and lower availability of glucose and insulin may also decrease LH pulsatility or limit ovarian responsiveness to gonadotropins.

1,140 citations

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TL;DR: Feed intake is usually decreased 30 to 35% during the final 3 wk prepartum, but negative energy and protein balances are not as severe as during the week following parturition, and supplementing fat to transition diets does not seem to alleviate health problems associated with negative energy balance.
Abstract: Pregnancy, decreased feed intake during late gestation, lactogenesis, and parturition have dramatic effects on metabolism in dairy cows during the transition period from 3 wk before calving to 3 wk after calving. Increases in plasma NEFA occur during the 10 d before calving and may precede the decrease in feed intake. Plasma NEFA concentrations are highest at calving and decrease rapidly after calving. Plasma glucose concentration decreases during the transition period except for a transient increase associated with calving. Hepatic glycogen is reduced and lipid is increased during the transition period. Feed intake is usually decreased 30 to 35% during the final 3 wk prepartum, but negative energy and protein balances are not as severe as during the week following parturition. Prepartum feed intake is positively correlated to postpartum feed intake; therefore, efforts to maximize feed intake should begin before calving. Overconditioned cows may be more susceptible to a prepartum decrease in feed intake. Increasing nutrient density of the diet during the transition period may enhance feed intake. Feeding more fermentable carbohydrate during the prepartum transition period may acclimate the microbial population to lactation diets, promote development of ruminal papillae, increase absorptive capacity of the rumen epithelium, and reduce lipolysis by delivering more glucogenic precursor to the liver and enhancing blood insulin. Supplementing fat to transition diets does not seem to alleviate health problems associated with negative energy balance. Enhancing amino acid absorption by the prepartum cow may improve lactation performance and health, although mechanisms of action have not been identified.

905 citations

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TL;DR: In this article, chemical constraints that may be responsible for the decrease in fiber digestion are explored, and a major factor appears to be rumen pH, to approximately 6.5 or 5.0, which results in depressed growth rates and decreased fibrolytic organisms.

802 citations

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TL;DR: Research to determine methods to reduce fatty acid delivery to the liver or to enhance hepatic export of very low density lipoprotein near calving is warranted because of increased fatty acid uptake by the liver, fatty acid esterification, and triglyceride storage.

800 citations