Effect of a hot environment on performance, carcass characteristics, and blood hormones and metabolites of pigs treated with porcine somatotropin.
Effect of a hot environment on performance, carcass characteristics, and blood hormones and metabolites of pigs treated with porcine somatotropin.
复制标题
高温环境对用猪生长激素处理的猪的生产性能、胴体特征以及血液激素和代谢物的影响。
DOI：
10.2527/1992.7092732x
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发表时间：
1992
影响因子：
3.3
通讯作者：
C. Baile
中科院分区：
文献类型：
--
作者：
B. Becker;C. Knight;F. Buonomo;G. Jesse;H. B. Hedrick;C. Baile
本研究比较了单次100毫克重组猪生长激素（rpST）植入对40头育肥猪生产性能、胴体特性、血液激素和代谢物的影响，这些猪分别暴露在热中性（TN； 18至21℃）或热环境（H； 27至35℃）中28或35 d。H环境下的猪生长速度较慢（P小于P）。对照和经rpst处理的猪在各自环境下的增重率相似。经rpst处理的猪饲料消耗量减少13% （P < 0.05）。P < 0.05)， H组猪的饲料消耗量比对照组猪少19% （P < 0.05）。rpst处理猪的饲料效率提高了15% （P < 0.05）。0.01)高于对照猪；环境对饲料效率无影响。屠宰时，经rpST处理的猪的P <。01)叶片脂肪含量少(P <。01)第10肋背膘比对照猪多。H组猪的P <。1)终体重，叶脂肪和背脂肪均低于全氮猪。rpST和H对血液激素和代谢产物有不同程度的影响。结果表明，在没有激素与环境相互作用的情况下，这种形式的rpST处理在TN下也能获得益处。
A study was conducted to compare the effects of a single 100-mg recombinant porcine somatotropin (rpST) implant on performance, carcass characteristics, and blood hormones and metabolites of 40 finishing pigs exposed to either a thermoneutral (TN; 18 to 21 degrees C) or hot environment (H; 27 to 35 degrees C) for 28 or 35 d. Pigs in H gained at a slower rate (P less than .01) than pigs in TN. Control and rpST-treated pigs gained at similar rates in respective environments. The rpST-treated pigs consumed 13% less feed (P less than .01) than the control pigs in both environments, and pigs in H consumed 19% less feed (P less than .01) than pigs in TN. Feed efficiency for rpST-treated pigs was 15% better (P less than .01) than that for control pigs; environment had no effect on feed efficiency. When slaughtered, pigs treated with rpST had less (P less than .01) leaf fat and less (P less than .01) 10th rib backfat than control pigs. Pigs in H had a lower (P less than .01) final BW and less leaf fat and backfat than pigs in TN. The rpST and H had various effects on blood hormones and metabolites. The results demonstrated that the benefits of this form of rpST treatment achieved under TN were also achieved in H with no interactions between the hormone and environment.