McAlester News-Capital, McAlester, OK

Opinion

August 2, 2013

Time to stockpile bermudagrass

STILLWATER — Harvested forage costs are a large part of the production costs associated with cow-calf enterprises. For the first time in two years, producers in Pittsburg County will have enough bermudagrass to consider stockpiling some of the forage for winter feed.

An Oklahoma State University trial had the objective to economically evaluate stockpiled bermudagrass. The research found that this practice can reduce cow-wintering costs. Forage accumulation during the late summer and fall is variable from year to year depending on moisture, temperatures, date of first frost and fertility. This strategy requires that an alternative pasture must be available for cattle to graze from late August to Nov. 1.

The OSU research has found that 50 to 100 pounds per acre of actual nitrogen fertilizer applied in the late summer has produced 1,000–2,000 pounds of forage per acre. In some ideal situations even more forage has been produced.

Studies between 1997 and 2000 found stockpiled bermudagrass protein concentrations were quite impressive, even after frost. In November, the range of protein content of the standing forage was 13.1 percent to 15.2 percent. The protein held up in December and ranged from 12.5 percent to 14.7 percent and declined to 10.9 percent to 11.6 percent in January.

To make best use of the stockpiled forage, supplementation with two pounds of 14 percent to 25 percent protein feed beginning in early December is recommended. Read about these studies in the 2001 OSU Animal Science Research Report at http://www.beefextension.com/research_reports/2001rr/index.htm. Some information about the forage quality is reported in the 1999 OSU Animal Science Research Report.

The following is a list of recommendations for stockpiling bermudagrass pastures for best results and reducing winter feed bills:

• Remove existing forage by haying, clipping, or grazing by late August.

• Apply 50 to 100 pounds of actual nitrogen fertilizer per acre.

• Defer grazing until at least late October or early November.

• Control access to forage by rotational or strip grazing to cut waste and extend grazing.

• If cool season forage is available for use in the winter, use the stockpiled bermudagrass first.

• Supplementation (Two pounds of 14–25 percent protein) should begin in early December.

• Provide free-choice mineral (6 percent to 9 percent phosphorus and Vitamin A) with a trace-mineral package.

David Cantrell is the Extension Agriculture Educator for the Pittsburg County Oklahoma Cooperative Extension Service. Contact him at 918-423-4120 or david.cantrell@okstate.edu.

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