Research Identifies Economical Corn Substitutes for Dairy Diet

6/25/2014

The Northern New York Agricultural Development Program (NNYADP) and Miner Institute have released the results of the first comprehensive analysis of products that can substitute for corn in dairy cow rations.
 
Corn is an expensive, starchy commodity often mixed into dairy cow feed rations. A Cornell University field survey showing that high-production dairies in the northeastern U.S. and upper Midwest were successful feeding lower-starch diets prompted interest from farmers in northern New York in evaluating economically feasible replacements for corn grain in dairy rations.
 
With NNYADP funding, the William H. Miner Agricultural Institute conducted a comprehensive inventory and analysis of accessible and appropriate dairy diet substitute products that are easily accessible in the northern New York region.
 
Project leader Rick Grant, president of Miner Institute, says, "The northern New York region is well-situated to take advantage of regional opportunities for purchasing good buys on such products as soybean hulls, distillers' grains, malt sprouts and gluten feed, as well as citrus pulp and whole cottonseed stored in facilities along the St. Lawrence River."
 
Dairy nutritionists and Northeast Ag and Feed Alliance feed industry representatives serving the northern New York dairy industry in Clinton, Essex, Franklin, Jefferson, Lewis and St. Lawrence counties participated in a survey to identify the dairy ration byproducts they currently use and where they are sourced.
 
Product samples were collected and sent to the Dairyland Lab in Arcadia, Wisconsin, to evaluate the digestibility; impact on rumen efficiency; protein, carbohydrate and macromineral content; and other factors using a new technique called Fermentrics.
 
'We believe this is the first time Fermentrics has been used to evaluate byproducts that can replace corn grain in the dairy cow diet," Grant says. "We found good agreement between the Fermentrics analysis and the actual measured cow response in previous studies conducted here evaluating carbohydrate sources."
 
Dairy farmers can use the results of the NNYADP-funded corn grain substitutes testing to develop lower-starch dairy rations using the most nutritionally effective and economical replacement products without compromising milk production.
 
The complete Economical Substitutes for Corn Grain in NNY Dairy Cattle Rations report with results tables is posted on the NNYADP website at www.nnyagdev.org.