Corn Grown Under Drought-Stressed Conditions Does Not Have Lower Energy Content than Corn Grown in a Previous “Normal” Year

dc.contributor.author Hurburgh, Charles
dc.contributor.author Newman, Monica
dc.contributor.author Patience, John
dc.contributor.author Hurburgh, Charles
dc.contributor.author Patience, John
dc.date 2018-08-25T22:13:25.000
dc.date.accessioned 2020-06-29T23:35:28Z
dc.date.available 2020-06-29T23:35:28Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 2014
dc.date.embargo 2014-02-11
dc.date.issued 2014-01-01
dc.description.abstract <p>Record-breaking heat and lack of rainfall during the 2012 growing season resulted in drought-stressed growing conditions. An experiment was conducted to investigate the impact of these conditions on nutrient composition and apparent total tract digestibilities (ATTD) of energy in corn, and determine if relationships exist between corn quality measurements, nutrient content, and digestibility of energy. Twenty-eight samples of corn from the 2012 crop, plus 2 samples of corn from the 2011 crop to serve as a positive control, were collected across the Midwest using yield as an initial screen for drought impact. Each sample was graded by an official U.S. grain inspection agency and analyzed for ether extract and crude protein content. Diets were formulated using each of the 30 corn samples plus vitamins, minerals, and 0.4% titanium dioxide as an indigestible marker. Sixty individually-housed barrows (PIC 359 X C29; initial BW=34.2±0.18 kg) were randomly allotted in an incomplete crossover design with 30 diets and 4 collection periods. Each of the 4 collection periods consisted of 6 days adjustment to the test diet followed by 3 days of fecal sample collection followed by 5 days of feeding a fully balanced grower diet. Diet and fecal samples were analyzed for dry matter (DM), titanium dioxide, and gross energy (GE). ATTD coefficients were then determined. Mean ATTD coefficients of GE between the 2011 and 2012 corn samples were not different (84.3 vs. 83.1 respectively; P>0.10). Comparing 2011 with 2012, there were no differences in ether extract (4.07% vs. 3.96%; P>0.10) or crude protein (8.56 vs. 9.19%; P>0.10). There were no differences in physical characteristics, except for 1,000 kernel weight, which varied among samples by 220% (176 to 386 grams). No relationships were found between any single corn quality measurement, physical or chemical, and digestibility of energy (P>0.10). In conclusion, ATTD of corn grown under drought-stressed conditions was not different in energy content from corn grown in the previous year under “normal” conditions.</p>
dc.identifier archive/lib.dr.iastate.edu/ans_air/vol660/iss1/93/
dc.identifier.articleid 2037
dc.identifier.contextkey 5098768
dc.identifier.doi https://doi.org/10.31274/ans_air-180814-1210
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ans_air/vol660/iss1/93
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/9106
dc.language.iso en
dc.relation.ispartofseries Animal Science Research Reports
dc.source.bitstream archive/lib.dr.iastate.edu/ans_air/vol660/iss1/93/R2928.pdf|||Sat Jan 15 02:31:00 UTC 2022
dc.subject.disciplines Agriculture
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.keywords Animal Science
dc.subject.keywords Agricultural and Biosystems Engineering
dc.title Corn Grown Under Drought-Stressed Conditions Does Not Have Lower Energy Content than Corn Grown in a Previous “Normal” Year
dc.type article
dc.type.genre swine
dspace.entity.type Publication
relation.isAuthorOfPublication 0544d4c0-b52e-42fa-8419-df2d08ad526b
relation.isAuthorOfPublication 5888d61a-1b3d-48c9-ab84-deb63aa3a43c
relation.isJournalIssueOfPublication 7e474e6a-85cb-446c-9f53-8afe83d5a741
relation.isSeriesOfPublication 7f3839b7-b833-4418-a6fa-adda2b23950a
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