379 Initial evaluation of floor cooling on lactating sows under acute heat stress

Smith, A. J.; Cabezón, F. A.; Schinckel, A. P.; Marchant‐Forde, Jeremy N.; Johnson, Jay S; Stwalley, Robert M.

doi:10.2527/asasmw.2017.379

Cited by 1 publication

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the rectal temperature, respiratory rate and lactation frequency of lactating sows were negatively affected by high temperature of 27.6–35.8°C (Cabezón, Stewart, et al, 2017; He, Zheng, et al, 2019; Silva et al, 2006). Specifically, their respiratory rate and rectal temperature were the maximum on the 4th day and 11th day after farrowing respectively (Cabezón, Schinckel, et al, 2017; Martin, 2012; Parois et al, 2018; Smith et al, 2017). According to Table 5, the effect of heat stress on the rectal temperature and respiratory rate of primiparous sows was more serious than that of multiparous sows.…”

Section: Resultsmentioning

confidence: 99%

“…(Cabezón, Stewart, et al, 2017;Silva et al, 2006). Specifically, their respiratory rate and rectal temperature were the maximum on the 4th day and 11th day after farrowing respectively Martin, 2012;Parois et al, 2018;Smith et al, 2017). According to Table 5, the effect of heat stress on the rectal temperature and respiratory rate of primiparous sows was more serious than that of multiparous sows.…”

Section: Research Contents Literature Main Conclusionmentioning

confidence: 96%

“…Effect of high temperature on respiratory rate and rectal temperature of lactating sows and Cabezón, Stewart, et al (2017) When sows were exposed to high temperatures of 27.6 and 35.8°C, their respiratory rate and rectal temperature were significantly increased Smith et al (2017) The effect of heat stress on the rectal temperature of primiparous sows was more serious than that of multiparous sows and Parois et al (2018) The respiratory rate and rectal temperature of lactating sows were the maximum on the 4th day and 11th day after farrowing respectively Renaudeau et al (2001) When lactating sows were exposed to high temperature of 29°C in the first 3 days, their respiratory rates was significantly reduced because they adapted to this high temperature change Leonard et al (2021) When lactating sows were exposed to high temperature of 34.7 ± 2.3°C, their respiratory rate was reduced and their heat production was increased because they adapted to this high temperature change Laspiur and Trottier (2001) The rectal temperature of lactating sows can be reduced by adding amino acid in their diet, but there was no significant change in their respiratory rate Effect of high temperature on endocrine function of lactating sows Yin et al (2016) and The LH concentration of sows was reduced during the 24 days of lactation at 30°C, but there was no significant change in the concentrations of sow progesterone and PRL Wettemann and Bazer (1985) The PRL concentration of lactating sows at 32°C was higher than that of gilts and pregnant sows at 21°C Biensen et al (1996) The oestradiol concentration of lactating sows in summer was lower than that of lactating sows in winter Renaudeau, Anais, and Noblet (2003) and Renaudeau, Noblet, and Dourmad (2003) The thyroid hormone concentration of lactating sows was reduced under the high temperature of 30°C The weight loss of lactating sows during lactation and their back-fat thickness loss were reduced under high temperature when the gestation feeding regime with 3.5-4.3 kg/day was adopted during their early pregnancy. However, there was no significant difference in their litter size and foetal viability rate Oh et al (2022) A 6.5% fibre was recommended for pregnant sows to reduce their respiratory rate and increase their food intake under heat stress Black et al (1993) Reducing the fibre and increasing the fat content in the diet of lactating sows can increase their milk yield and reduce their weight loss during lactation Khamtawee et al (2021) The cinnamon oil supplementation 1.0 g/kg of the diet in a tropical environment can increase the feed intake of lactating sows.…”

Section: Research Contents Literature Main Conclusionmentioning

confidence: 99%

See 2 more Smart Citations

A review on the effect of light–thermal–humidity environment in sow houses on sow reproduction and welfare

Xie

et al. 2023

Reprod Domestic Animals

View full text Add to dashboard Cite

The environment in sow houses is the key to restrict sow production due to its significant effect on sow growth and reproduction. In this article, the effect of light, thermal and light–thermal–humidity environment in sow houses is systematically reviewed for sow reproduction and welfare according to the existing literature. The results show the optimal ambient temperature range for sows is approximately 16–22°C, as well as the lowest and highest critical temperature are 16 and 27°C respectively. Meanwhile, the increase of relative humidity from 50% to 70% is equivalent to the increase of effective temperature by 0.9°C in sow houses. In addition, the evaluation indexes are summarized to the future research direction is proposed according to the reviewed results. It can be concluded that the current research mainly focuses on the effect mechanism of light–thermal–humidity environment on sow growth and reproductive performance, as well as the optimal regulation range of light–thermal–humidity environment. In particular, it is a popular topic to further study the effect of light–thermal–humidity environment on the genetic material of sows, as well as metabolic parameters and body composition of their offspring. The above conclusions can contribute to guiding the regulation of light–thermal–humidity environment in sow houses and improving the sow welfare.

show abstract