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20151206092346.0 |
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140310s2013 txu obm 000 0 eng d |
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|a (OCoLC)ocn872139972
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|a (OCoLC)872139972
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|a (TxCM)http://hdl.handle.net/1969.1/151030
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|a TXA
|b eng
|e rda
|e pn
|c TXA
|d UtOrBLW
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|a TXAM
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|a 2013
|a Thesis
|a 1969.1/151030
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|a Weldon, Kyle,
|e author.
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|a Nitrogen Metabolism in Bos indicus and Bos taurus Cattle Consuming Low-quality Forages /
|c by Kyle Weldon.
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|a [College Station, Texas] :
|b [Texas A & M University],
|c [2013]
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|a 1 online resource.
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| 336 |
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|a text
|b txt
|2 rdacontent
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| 337 |
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|a computer
|b c
|2 rdamedia
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| 338 |
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|a online resource
|b cr
|2 rdacarrier
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| 347 |
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|a text file
|b PDF
|2 rda
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| 500 |
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|a "Major Subject: Animal Science"
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|a Includes vita.
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| 502 |
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|b Master of Science
|c Texas A & M University
|d 2013
|o http://hdl.handle.net/1969.1/151030
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|a Includes bibliographical references.
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|a Text (Thesis)
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|a Five Angus (Bt) and 5 Brahman steers (Bi) fitted with ruminal and duodenal cannulas were used in concurrent 5 x 5 Latin squares to determine the effects of supplemental protein degradability and level of supplemental N on utilization of rice straw. Treatments consisted of a control (CON; no supplement) and two levels (50 and 100 mg N/kg BW) of an isonitrogenous supplement (27% CP), either high (H; 72%) or low (L; 28%) in DIP. Forage OM intake (FOMI) was greater for Bt than Bi (P = 0.05). Supplementation increased FOMI in both Bt and Bi (P < 0.05). Organic matter digestibility (OMD) was greater in Bi than Bt (P < 0.01). Supplementation increased OMD for Bi (P = 0.02) but not Bt. Total digestible OM intake (TDOMI) was similar between subspecies (P = 0.12). Bos indicus had greater ruminal NH3-N than Bt (P < 0.01). Plasma urea nitrogen (PUN) was greater for Bi than Bt (P < 0.01) for all treatments and at both 0 and 4 h after feeding. Supplementation tended (P = 0.06) to increase PUN versus CON in Bt, but not Bi (P = 0.82). Bos taurus had numerically (P = 0.19) greater total volatile fatty acids (VFA) across treatments than Bi. Total N intake increased versus CON (P < 0.01), and greater amounts of supplemental N increased total N intake within both subspecies (P < 0.01). Fecal N excretion was greater in Bt than Bi (P = 0.01). Supplementation increased (P < 0.01) fecal N versus CON for both subspecies. Urinary N tended to be higher for Bi than Bt (P = 0.10). Supplementation increased (P < 0.05) urinary N for both subspecies. Retained N was greater for Bt over Bi (P = 0.07). While Bt had greater FOMI, increased OMD for Bi with supplementation resulted in similar TDOMI between subspecies. Overall, Bi had higher NH3-N and PUN than Bt; which increased as level and degradability of supplements increased in both subspecies. Increased supplementation raised N excreted and N balance for both subspecies; fecal N was greater in Bt, while urinary N was greater in Bi. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151030
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|a Description from author supplied metadata (automated record created 2013-12-16 16:48:53).
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|a Major Animal Science.
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|a cattle
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| 653 |
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|a supplementation
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|a Wickersham, Tryon A.,
|e thesis advisor.
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|a Texas A & M University,
|e degree granting institution.
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|u http://hdl.handle.net/1969.1/151030
|z Link to OAK Trust copy
|t 0
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| 948 |
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|a cataloged
|b h
|c 2014/3/10
|d o
|e blrosas
|f 1:53:30 pm
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| 994 |
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|a C0
|b TXA
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| 999 |
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|a MARS
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| 999 |
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|s 35c4fc43-63bb-3d9b-a78c-1a14531b6457
|i d51caf79-f8ec-3d87-8ec4-7f22c39e6ace
|t 0
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| 952 |
f |
f |
|a Texas A&M University
|b College Station
|c Electronic Resources
|d Available Online
|t 0
|e 2013 Thesis 1969.1/151030
|h Other scheme
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| 998 |
f |
f |
|a 2013 Thesis 1969.1/151030
|t 0
|l Available Online
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