کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8503771 1554283 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of betaine and heat stress on lactation and postweaning reproductive performance of sows
ترجمه فارسی عنوان
اثرات بتائین و استرس گرما بر عملکرد شیردهی و عملکرد پس از زایمان در گاوهای شیری
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
This study was conducted to evaluate the underlying physiological changes during heat stress and the effect of betaine supplementation in lactating sows. Twenty sows were housed in 2 rooms (each with 10 sows) to simulate heat stress (HS: 31°C from 0800 to 1600 h and 26°C for the rest of the day) or thermoneutral (TN: 22°C during the entire trial) conditions. Treatments were randomly allotted to each sow to receive 0.00% or 0.22% of a betaine supplement in their diets. Sows were blocked by parity as they entered the farrowing rooms at d 110 to 112 of gestation. Sows housed in the HS condition had ad libitum access to feed. Sows housed in the TN condition were pair fed with sows in the HS room. Follicle size was measured every 12 h with a real time ultrasound from weaning to ovulation. Betaine supplemented sows had 0.23°C lower rectal temperature than control sows (P = 0.048). Respiration rates and rectal and skin temperatures were 36 breaths/min and 0.44 and 3.55°C greater under HS than TN conditions, respectively (P < 0.004). Homocysteine and cortisol serum concentrations did not differ between treatments (P > 0.44) or environments (P > 0.25). The mean follicle diameter was smaller under HS than TN conditions (P = 0.003). Betaine supplemented sows had greater follicle diameter than control sows (P = 0.043). The time to ovulation from weaning was 2.1 d longer in HS sows than TN sows (P = 0.005).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 33, Issue 2, April 2017, Pages 241-253
نویسندگان
, , , ,