Research Nuggets

Effects of folic acid and vitamin B12 supplementation

This study was undertaken to determine the effect of a combined folic acid and vitamin B12 supplement given in early lactation on culling rate, metabolic disorders and other diseases, and reproduction in commercial dairy herds. A total of 805 cows in 15 commercial dairy herds were involved. FULL STORY »

Effect of ambient temperature, sodium bicarbonate supplementation

The amount of water provided to cows on dairy farms can be a limiting factor for production, especially during high temperature periods. This experiment aimed to quantify water balance of dairy cows subjected to thermoneutral or high ambient temperatures. When water flows were related to dry matter intake, the quantities of evaporated water and drunk water increased by a similar range in cows submitted to high temperature, regardless of physiological stages or sodium content of diets. FULL STORY »

‘Stink bug’ odor compounds do not transfer into milk

The brown marmorated stink bug (BMSB), Halyomorpha halys, is an invasive insect responsible for severe damage to agricultural crops, including feed crops, in the northeastern United States. This study evaluated whether corn crops with high infestation of BMSB posed a risk to milk quality, feed intake, and silage quality. This work is the first to demonstrate that the bug stink odor compound does not transfer to milk when delivered directly to the rumen. Moreover, it cannot be detected in feed following ensiling. FULL STORY »

Shredlage feeding study underway at UW-Madison

One of the most heavily attended breakout sessions at the 2014 Professional Dairy Producers of Wisconsin Business Conference, March 13-14, was a session on “shredlage.” During that session, Dr. Randy Shaver, University of Wisconsin-Madison dairy scientist, discussed a major feeding study underway at UW-Madison’s Arlington research farm. FULL STORY »

Feeding for designer manure?

Macro minerals must be fed at appropriate levels to optimize animal production and health. Overfeeding leads to increased excretion in feces and urine, and over-application can lead to excessive concentrations in soils which impact crop production. In a paper (Impact of Macro Mineral Nutrition (Na, K, Mg, Ca) of Dairy Cows on Nutrient Excretion) presented at the 2014 Idaho Nutrient Management Conference, University of Idaho Extension dairy specialist Rick Norell and fellow researcher Mireille Chahine discuss nutrient balance studies for evaluating mineral excretion, methods for estimating excretion on farms, and procedures for managing nutrient excretion on farms. FULL STORY »

Effect of monensin in lactating dairy cow diets

The objective of this study was to determine the effects of monensin (M) supplementation on lactation performance of dairy cows fed diets of either reduced (RS) or normal (NS) starch concentrations as total mixed rations. FULL STORY »

Milk quality from cows fed DDGS

The results of this study indicate that feeding of DDGS to lactating dairy cows, under controlled conditions, does not have negative effects on milk oxidative stability or flavor. However, feeding 25% DDGS did negatively impact milk production and changed milk fatty acid profile. FULL STORY »

Fresh milk fat to protein ratio used to identify ketosis

Subclinical ketosis affects 26 to 55 percent of dairy cows and is conservatively estimated to cost dairy producers $78 per case. FULL STORY »

Give precision-fed heifers adequate bunk space

Adequate feed bunk space for heifers is important in any group-housed heifer facility, and even more so when managing heifers in a precision-feeding system. Jud Heinrichs, dairy science professor at Penn State University, recommends heifers in a precision-feeding program be given 14 to 24 inches of bunk space as they progress from 4 months of age to pre-calving or 22 months of age. FULL STORY »

Study examines milk replacer carbohydrate sources

Research from the University of Georgia looks at the effect of milk replacers formulated with alternative carbohydrate sources on calf health and performance. The findings were published in The Professional Animal Scientist. FULL STORY »

Canola meal shines again

Canola meal may be a better deal than many people think. FULL STORY »

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