<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Romero, E. M.</style></author><author><style face="normal" font="default" size="100%">Gutierrez, E.</style></author><author><style face="normal" font="default" size="100%">Bernal, H.</style></author><author><style face="normal" font="default" size="100%">Morales, H.</style></author><author><style face="normal" font="default" size="100%">Colin, J.</style></author><author><style face="normal" font="default" size="100%">Olivares, E.</style></author><author><style face="normal" font="default" size="100%">Gutierrez, O.</style></author><author><style face="normal" font="default" size="100%">Torres, V.</style></author><author><style face="normal" font="default" size="100%">Dennis, H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Seasonability in the concentration of blood metabolites of Charolais and Beefmaster cows grazing Buffel grass in Northeastern Mexico</style></title><secondary-title><style face="normal" font="default" size="100%">Cuban Journal of Agricultural Science</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Cuban J Agr Sci</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">angus</style></keyword><keyword><style  face="normal" font="default" size="100%">beefcattle</style></keyword><keyword><style  face="normal" font="default" size="100%">blood metabolites</style></keyword><keyword><style  face="normal" font="default" size="100%">body condition</style></keyword><keyword><style  face="normal" font="default" size="100%">buffelgrass</style></keyword><keyword><style  face="normal" font="default" size="100%">cattle</style></keyword><keyword><style  face="normal" font="default" size="100%">digestion</style></keyword><keyword><style  face="normal" font="default" size="100%">glucose</style></keyword><keyword><style  face="normal" font="default" size="100%">growth</style></keyword><keyword><style  face="normal" font="default" size="100%">insulin</style></keyword><keyword><style  face="normal" font="default" size="100%">performance</style></keyword><keyword><style  face="normal" font="default" size="100%">primiparous beef-cows</style></keyword><keyword><style  face="normal" font="default" size="100%">ureic nitrogen</style></keyword><keyword><style  face="normal" font="default" size="100%">weight</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Sep</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000257055700006</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">3</style></number><volume><style face="normal" font="default" size="100%">41</style></volume><pages><style face="normal" font="default" size="100%">225-230</style></pages><isbn><style face="normal" font="default" size="100%">0864-0408</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Blood samples were collected by punction of the coxal vein from 18 and 20 Charolais and Beefmaster cows, respectively, in the four seasons. The cows were kept in rotational grazing of Buffel grass (Cenchrus ciliaris L.) in northeastern Mexico to assess the effect of seasonal changes oil their serum concentrations of glucose, ureic nitrogen, phosphorus (P), calcium (Ca), insulin and triiodothyronine (T-3). Besides, their liveweight (LW) and body condition (BC) were assessed. The serum levels of glucose and ureic nitrogen were affected (P &lt; 0.01) independently by both the season and the breed. The lowest (P &lt; 0.01) values of glucose and ureic nitrogen were observed during the summer. The minimum content of glucose was not lower than that reported as normal (45 mg/dL), but, in the case of the ureic nitrogen, the lowest contents during the spring (6.4) and summer (5.7) were lower than the normal (10.3 mg/dL). The lowest (P &lt; 0.05) values of Ca and P were recorded during the spring, when the concentration of Ca (8.5 mg/dL) was lower that the recommended value (9.0 mg/dL). The serum metabolites glucose and ureic nitrogen were different (P &lt; 0.01) between the breed Charolais and Beefmaster, and were of 53 and 10.2 versus 68 and 8.7 mg/dL, respectively. The serum insulin concentration was lower in the summer (0.5 mg/dL) and the T-3 was modified (P &lt; 0.05) parallel to LW, according to the breed and the season. The body condition was changed according to season, although 90% of the animals kept their body condition above 5. The blood metabolic profile in this research may represent a useful tool to establish differential needs of supplementation for the cattle grazing on Buffel grass throughout the year.</style></abstract><accession-num><style face="normal" font="default" size="100%">ISI:000257055700006</style></accession-num><notes><style face="normal" font="default" size="100%">317YGTimes Cited:0Cited References Count:36</style></notes><auth-address><style face="normal" font="default" size="100%">Romero, EMInst Tecnol Altamira, Tamaulipas, MexicoInst Tecnol Altamira, Tamaulipas, MexicoInst Tecnol Altamira, Tamaulipas, MexicoUniv Autonoma Nuevo Leon, Fac Agron, Marin 66700, NL, MexicoInst Ciencia Anim, San Jose De Las Lajas, Habana, CubaNew Mexico State Univ, Dept Anim &amp; Range Sci, Las Cruces, NM 88003 USA</style></auth-address></record></records></xml>