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Journal of Dairy Science Vol. 56 No. 11 1439-1444
© 1973 by American Dairy Science Association ®
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Comparative Feeding Value of High-Sugar Male Sterile and Regular Dent Corn Silages1

P. E. Stake2, M. J. Owens, D. J. Schingoethe and H. H. Voelker

Dairy Science Department, South Dakota State University, Brookings 57006

ABSTRACT

Nutritive qualities of high-sugar male sterile hybrid corn and regular dent hybrid corn silages were compared over 2 yr with growing Holstein steers and lactating cows. Silage yield and harvesting data were obtained both years.

High-sugar corn silage contained more crude protein than regular silage, 8.59 versus 6.34% of dry matter. Silage dry matter yields per hectare were greater for regular corn in year 1, but greater for high-sugar corn the second yr.

Two groups of 12 Holstein steers were fed the respective silages ad libitum and 1.81 kg of a 13.2% crude protein supplement per head per day. Silage dry matter intake and average daily gain did not differ between groups: 5.32 and 1.02 versus 5.48 and .93 kg/day for the high-sugar and regular corn fed groups. Apparent digestibilities of protein and fiber were greater for the high-sugar corn silage: 63.5 versus 52.2% and 61.9 versus 59.3%, respectively.

During year 2, 20 cows were included in a switchback design to compare regular with high-sugar corn silage for lactation. Cows fed regular com silage produced more milk (17.5 versus 16.55 kg/day) and solids-corrected milk (18.03 versus 16.79 kg/day) than those fed high-sugar corn silage. No differences in dry matter intake, milk fat production, or body weight changes were detected.

FOOTNOTES

1 Published with the approval of the Director of the South Dakota Agricultural Experiment Station as Publication No. 1176 of the Journal Series.

2 Present address: Dairy Science Department, University of Georgia, Athens 30601.






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