J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1969. 29:987-991.
© 1969 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Thornton, J. H.
Right arrow Articles by Meiske, J. C.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Thornton, J. H.
Right arrow Articles by Meiske, J. C.

Corn Maturity. III. Composition, Digestibility of Nutrients and Energy Value of Corn Cobs and Ear Corn of Four Maturities1,2,

J. H. Thornton3, R. D. Goodrich and J. C. Meiske

University of Minnesota, St. Paul4

Abstract

Changes in proximate components of corn cobs harvested at early milk, early dough, mid-dent and mature stages of kernel development were decreases in crude protein, ether extract and ash, and an increase in crude fiber with advancing maturity. Cell wall constituents and acid detergent fiber contents also increased with advancing maturity.

A digestion study showed that the apparent digestibility of total carbohydrates, crude protein, cell wall constituents, hemicellulose, gross energy and organic matter decreased, while ether extract increased in apparent digestibility as the cobs matured. Corn cobs from ear corn of early milk maturity had TDN and DE values approximately 115% those of mature cobs. Cobs from corn in early dough and mid-dent stages of kernel maturity had approximately 110 to 112% of the TDN and DE values of mature cobs. Calculated TDN values for ear corn at early milk, early dough and mid-dent stages of maturity were 88.0, 90.4 and 98.4% of values for mature ear corn.

Footnotes

1 Paper No. 6859 of the Scientific Journal Series of the Minnesota Agricultural Experiment Station.

2 Data taken from a thesis submitted by the senior author to the Graduate School in partial fulfillment of requirements for the degree of Master of Science.

3 Present address: Department of Animal Science, Iowa State University, Ames.

4 Department of Animal Science.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1969 by the American Society of Animal Science.