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September 2014 Arkansas Dairy E-News

September 26, 2014


Get Ready To Plant Winter Annual Pastures
John Jennings, Professor

Winter annual pastures make great additions to a forage program. They can supplement low quality hay, fill in grazing gaps and greatly reduce purchased feed cost. The summer rain this year has produced abundant pasture and hay, but overall quality is low due to harvest delays caused by the same rains. Last fall many producers chose to rely on the good hay crop despite it’s poor quality instead of managing for fall grazing. Cattle didn’t fare well with low quality hay and a long, cold winter.
For more information Click Here

Cattle Grubs
Kelly M. Loftin, Associate Professor and Ricky F. Corder, Program Associate

Many producers are still having issues with fall army worms and horn flies, but now is the appropriate time to consider controlling another important pest, the cattle grub. Cattle grubs are the immature stages of warble or heel flies. Although two species of cattle grubs occur in the United States, the common cattle grub, Hypoderma lineatum, is the most common. Adult heel flies are nuisances, occasionally causing cattle to run wildly with their tails in the air (gadding) or to stand for long periods of time in deep shade or water. These defensive activities result in reduced milk production and/or reduced weight gains. However, the greatest impact is from the grubs (larvae) that are internal parasites of cattle.        
For more information Click Here

 Water for Dairy Cattle
Shane Gadberry, Associate Professor

Water intake for a dairy cow can be estimated from food consumption, feed dry matter percentage, milk production, sodium intake, protein intake and air temperature. These relationships make a lot of sense. For example, milk is one mechanism whereby cattle lose water, and daily water losses through milk are estimated to account for 26 to 34 percent of total losses. Water accounts for 56 to 81 percent of total body weight of a cow, and as her system manages acid-base balance through absorption and excretion of electrolytes, water plays an important role in providing an aqueous media for nutrient transport and elimination. During the hot days of summer, water is also important for body temperature regulation.

Dairy enews Sept 2014                                                             

Common cattle grub adult.
Photograph by Lyle J. Buss, University of Florida.                                                          

For more information Click Here

Managing Phosphorus in Pasture-Based Dairies
Dirk Philipp, Assistant Professor

Phosphorus is a macronutrient and essential for plant growth. Although not required in the same quantities as nitrogen, phosphorus is important for a variety of plant-metabolic functions. Soil-native phosphorus levels are relatively low and often cannot provide the amounts needed for the highly productive forages we use today in field cropping applications and pasturing. Forages, either grasslike or broadleaf plants, have different nutrient requirements that make site- and plant-specific fertilizer application a necessity. For more information Click Here

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