Fall 2015 Materials and Schedule
Follow the links of this page to access readings, discussion sheets, keys to classroom activities. After doing the pre-class reading assignments, you are expected to take a short quiz and to complete "pre-blog" entry. The deadline for completing the readings, the quizzes and the pre-blog is 10:00 am the day of the class, (unless noted otherwise). Feel free to bring your laptop or mobile device to class.
| Class | Date | Modules and Topics | ||||
|---|---|---|---|---|---|---|
| -- | W 12/02 | Introduce yourself to your instructor (see link below). | ||||
| 1 | F 12/04 | From Nutrient Requirement to Whole Animal (In)efficiencies | ||||
| 2 | M 12/07 | Milk Urea Nitrogen (MUN) | ||||
| 3 | W 12/09 | Urinary Urea N Excretion | Ammonia Emission | ||||
| 4 | F 12/11 | Urea Recycling | ||||
| 5 | M 12/14 | C x N Interactions: In the Rumen | Gaseous Emissions | ||||
- -- - W 12/02
- As a way to practice using the "blog" pages of this site, please introduce yourself to your instructor. May be your classmates will learn something new about you! If you are enrolled as a course participant, please follow this link for more details (Deadline: 12:00 p.m.).
- 01 - F 12/04
- Reading 1: Arndt et al. (2015) Feed conversion efficiency in dairy cows | Quiz 01 | Pre-Blog 01 (Deadlines: 10:00 a.m.).
- Reading 2: Kristensen et al. (2015) Feed conversion efficiency of Jerseys and Holsteins | Quiz 02 | Pre-Blog 02 (Deadlines: 10:00 a.m.).
- Read Abstract:
- Vallimont et al. (2011) Feed conversion efficiency of Pennsylvania herds.
- In-class activity: Gross Efficiency of Energy and Nitrogen in Lactating Dairy Cow.
- 02 - M 12/07
- Reading 1: Spek et al. (2013) Factors Influencing MUN | Quiz 03 | Pre-Blog 03.
- Reading 2: Huhtanen et al. (2015) Cow to Cow variation in MUN | Quiz 04 | Pre-Blog 04.
- Read Abstract:
- Wattiaux et al. (2005) DHIA-related factors affecting MUN.
- In-class activity: Partition of Intake N Comparative Analysis of Two Studies | What does MUN tell us (download MUN ppt here)?
- 03 - W 12/09
- Reading 1: Spek et al. (2013) Prediction of Urine N and Urine Urea N | Quiz 05 | Pre-Blog 05.
- Reading 2: Aguerre et al. (2010) Herd dietary CP and ammonia emission from manure | Quiz 06 | Pre-Blog 06.
- Read Abstract:
- In-class activity: Critical Evaluation on N balance Studies "Cow-Level" and "Pen-Level".
- 04 - F 12/11
- Reading: Reynolds et al. (2008) The microbial/host symbiosis is inherently adaptable to asynchronous N and energy supply | Quiz 07 | Pre-Blog 07.
- Read Abstract:
- Spek et al. (2013) Interaction between dietary content of protein and sodium chloride on milk urea concentration, urinary urea excretion, renal recycling of urea, and urea transfer to the gastrointestinal tract in dairy cows.
- Kohn et al. (2005) Using blood urea nitrogen to predict nitrogen excretion and efficiency of nitrogen utilization in cattle, sheep, goats, horses and rats. The authors reported that kidney's clearance rate of urea was lower in herbivores than in mono gastric animals.
- Lapierre et al. (2001) Nitrogen recycling in the ruminant: A review.
- In-class activity: Download and "study" the following two spreadsheets that illustrate important relationships: DMI (kg/d), Dietary CP (%), and NI (kg/d) and Ammonia Ammonium pH and pKa. Also See Class Discussion sheet (Q&A) on Urea Recycling.
- 05 - M 12/14
- Reading 1: Dijkstra et al. (2011) Explore the trade-off between nitrogen excretion and enteric methane production | Quiz 09 | Pre-Blog 09.
- Read Abstract:
- Klevenhusen et al. (2010) Enteric and manure-derived methane and nitrogen emissions as well as metabolic energy losses in cows fed balanced diets based on maize, barley or grass hay.
- Gidlund et al. (2015) Effects of soybean or canola meal on milk production and methane emissions in lactating dairy cows fed grass-based diets.
- In-class activity: Strategies to reduce N excretion and methane emission: A win-win or a trade off?