Education Commons^™

Ec97-275 Effect Of Lactation Length On Sow Reproductive Performance, Donald G. Levis

University of Nebraska-Lincoln Extension: Historical Materials

As lactation length decreases there is an increase in the weaning-to-estrus interval, a decrease in farrowing rate, a decrease in subsequent litter size and an increase in pigs weaned per sow per year. Because of herd-to-herd differences in the influence of lactation length on reproductive performance, each farm should conduct a preliminary study to evaluate the effect of the lactation length being considered before implementing the “new” weaning age of piglets.

Ec97-276 Management Strategies For Pen-Mating Female Pigs, Donald G. Levis

University of Nebraska-Lincoln Extension: Historical Materials

The master control switch of a pork production enterprise is weaning day. Pork production managers have little or no control concerning when a weaned female will cycle or how long she will be in estrus after weaning. When females are pen-mated, the producer needs to use management procedures to prevent an excessive number of estrous females from expressing the standing response at the same time, try to manage estrous females so that they are bred at the proper time, try to manage boars so they maintain an adequate level of fertility, evaluate boars for level of sexual behavior before and …

Ec97-274 Management Of Replacement Gilts For Efficient Reproduction, Donald G. Levis

University of Nebraska-Lincoln Extension: Historical Materials

Successfully introducing replacement gilts into the breeding herd is an important aspect of breeding herd efficiency. To attain herd efficiency, females must ovulate adequate numbers of viable ova, express estrus, show willingness to mate and conceive in a regular manner. If these qualities are properly developed, pregnancy rate and litter size will be maximized. A gilt development and management program needs to be designed for gilts from birth to farrowing their first litter.

Nf97-317 Managing Dairy Cows To Avoid Abomasal Displacement, Rick Grant

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses feeding strategies to reduce the incidence of displaced abomasum in your dairy herd.

G97-1324 Beef Cattle Implant Update, Dicky D. Griffin, Terry L. Mader

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the mechanism of action and use strategies for growth promoting implants, including expected responses and cost analysis.

Introduction

Growth promoting implants have been used extensively in beef production for over 30 years. Significant changes in implants and implanting strategies have occurred. Prior to 1987, available implants were estrogenic agents which metabolically enhanced nutrient use to enhance growth. These products improved feed efficiency 5-10 percent and daily gains from 5-15 percent. In 1987, the androgenic (tissue building) agent, trenbolone acetate, was approved for use in growth promoting implants. This compound had an additive effect with existing estrogenic implants. …

G97-1314 Medication Withdrawal In Beef Cattle, Dicky D. Griffin, Dale Grotelueschen

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide lists the current withdrawal times for medications used in beef cattle.

Using proper livestock medications is very important. Proper use not only ensures maximal benefits from the medication but minimizes the chances of an unwanted residue. The National Cattlemen's Beef Association has worked hard to develop a premiere quality assurance program. In conjunction with other national and state beef and veterinary associations, the Beef Quality Assurance program now extends to almost every state in the nation. As a result, the safety and quality of beef has never been better. The outstanding record includes having an extremely low rate …

G97-1320 Feeding To Maximize Milk Solids, Rick J. Grant

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes feeding guidelines to increase production of solids-corrected milk.

Proper feeding management of the dairy herd can improve the economy of production and provide for a healthier cow. Feeding to increase production of milk with maximum levels of milk fat and protein is essential for achieving these benefits.

Milk solid components include fat, protein, lactose, and minerals. Normal values for milk fat range from 3.7 percent (Holstein) to 4.9 percent (Jersey); milk protein ranges from 3.1 percent (Holstein) to 3.8 percent (Jersey). Lactose is usually 4.6 to 4.8 percent for all breeds and minerals (ash) average .74 percent. …

G97-1325 What Management Practices Are High Producing Dairy Herds Using?, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide outlines management practices used in high-producing dairy operations.

In 1996, a national dairy survey was undertaken by the National Health Monitoring System. This survey of management practices was sent to 2,500 herds in 20 states representing 83.1 percent of all dairy cows in the United States. The states included in the survey were California, Florida, Idaho, Illinois, Indiana, Kentucky, Michigan, Minnesota, Missouri, New Mexico, New York, Ohio, Oregon, Pennsylvania, Tennessee, Texas, Vermont, Washington and Wisconsin. The survey asked 13 questions ranging from computer use, ration balancing, BST use and veterinarian usage to various calf rearing procedures. The survey …

Mp68 1996-98 Dairy Report

University of Nebraska-Lincoln Extension: Historical Materials

Annual Report of University of Nebraska-Lincoln Dairy Research for 1997-1998. Topics include:

Time of Initiating Dietary Fat Supplementaion on Lactation and Reproduction

A Soyhull:Soy Lecithin Soapstock Mixture for Early Lactation Dairy Cows

Nonenzymatically Browned Soybeans for Dairy Cattle

Feather and Blood Meal Combination for Lactating Dairy Cows

Impact of Nonfiber Carbohydrate Concentration on Forage Fiber Digestion

Sulfite Liquor-Treated Meat and Bone Meal for Dairy Cows

The OTHER Causes of Infectious Diseases

Test Day Genetic Evaluations

Income and Herdlife

Maternal Genetic and Cytoplasmic Effects in Dairy Cattle

Financial and Management Survey of Nebraska Dairy Producers

Free-Stall Design and Maintenance

Horizontal Silos …