Dairy Research Staff
Dr. Paul Kononoff, (select to read biography)
Ezequias Castillo-Lopez, Ph.D. candidate
Ezequias is originally from the Yukutan Peninsula in southeastern Mexico.
Hugo Ramirez-Ramirez, M.S. candidate
Hugo is originally from Chapingo, Mexico.
Kim Clark, M.Ag. Research Coordinator
UNL Dairy Research Unit Staff
Erin Marotz, UNL Dairy Research Unit Manager
Additional Dairy Unit Staff:
Dairy Research Unit Information:
The UNL Dairy Research Unit consists of approximately 135 purebred Holstein cows and 125 replacement heifers. The mature lactating cows are housed in two different types of environments. When not being used for research, cows are housed in a free stall hoop style barn and are bedded with sand. Sprinklers are also mounted over the feed line and fans are mounted over the free stalls to help alleviate heat stress. Cows being used for research are housed in a traditional tie-stall barn. Here, as many as 40 animals may be housed in stalls with a rubber filled mattress on the floor. Mattresses contain ground rubber chips and are covered with a durable cloth covering. This mattress provides about four inches of cushioned surface for the cows to lie on. Each stall contains an individual feed box to allow measurement of daily feed consumption. These cows are fed once daily using a small drum mixer (Data Ranger; American Calan, Inc., Northwood, NH) and removed from the barn to be milked twice daily. While out of the barn, their stalls are cleaned and re-bedded with a light dusting of sawdust. Attached to the tie-stall barn is an office and wet sample working area. This 200 square foot room is equipped with a sink and also provides sample storage refrigerator/freezer and shelving units. The double-five milking parlor is equipped with automatic cow identification and Boumatic meters. These units continue to provided accurate milk production data.
Ruminant Nutrition Laboratory:
The University of Nebraska-Lincoln Ruminant Nutrition Laboratory is located on the ground floor of the UNL Animal Science Building. The lab is equipped with all necessary equipment needed for ruminant feed analysis and includes centrifuges, five Precision Thelco Ovens, an ashing oven, and atomic absorption spectrophotometer, pH meters, LECO FP-528 Nitrogen/Protein Determinator, spectrophotometer, a gas chromotograph, and sample grinding mills. The lab is also equipped with refluxing apparatuses Berzelius beakers, fritted glass crucibles suction filtering devices to run individual NDF and ADF fiber analysis on as many as 24 samples simultaneously.
You may download slides used in these lectures here: Lecture 1, Lecture 2, Lecture 3, Lecture 4.
Questions or comments? Contact Kim Clark. E-mail: email@example.com or Phone: 402-472-6442.