Evaluation of high nutrient diets on litter performance of heat-stressed lactating sows
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Objective: The present study investigated the litter performance of multiparous sows fed 3% and 6% densified diets at farrowing to weaning during summer with mean maximum room temperature of 30.5°C. Methods: A total of 60 crossbred multiparous sows were allotted to one of three treatments based on body weight according to a completely randomized design. Three different nutrient levels based on NRC were applied as standard diet (ST; metabolizable energy, 3,300 kcal/kg), high nutrient level 1 (HE1; ST+3% higher energy and 16.59% protein) and high nutrient level 2 (HE2; ST+6% higher energy and 17.04% protein). Results: There was no variation in the body weight change. However, backfat thickness change tended to reduce in HE1 in comparison to ST treatment. Dietary treatments had no effects on feed intake, daily energy intake and weaning-to-estrus interval in lactating sows. Litter size, litter weight at weaning and average daily gain of piglets were significantly greater in sows in HE1 compared with ST, however, no difference was observed between HE2 and ST. Increasing the nutrient levels had no effects on the blood urea nitrogen, glucose, triglyceride, and creatinine at post-farrowing and weaning time. The concentration of follicle stimulating hormone, cortisol and insulin were not affected by dietary treatments either in post-farrowing or weaning time. The concentration of blood luteinizing hormone of sows in ST treatment was numerically less than sows in HE2 treatment at weaning. Milk and colostrum compositions such as protein, fat and lactose were not affected by the treatments. Conclusion: An energy level of 3,400 kcal/kg (14.23 MJ/kg) with 166 g/kg crude protein is suggested as the optimal level of dietary nutrients for heat stressed lactating sows with significant beneficial effects on litter size.
Abstract
Objective: The present study investigated the litter performance of multiparous sows fed 3% and 6% densified diets at farrowing to weaning during summer with mean maximum room temperature of 30.5°C. Methods: A total of 60 crossbred multiparous sows were allotted to one of three treatments based on body weight according to a completely randomized design. Three different nutrient levels based on NRC were applied as standard diet (ST; metabolizable energy, 3,300 kcal/kg), high nutrient level 1 (HE1; ST+3% higher energy and 16.59% protein) and high nutrient level 2 (HE2; ST+6% higher energy and 17.04% protein). Results: There was no variation in the body weight change. However, backfat thickness change tended to reduce in HE1 in comparison to ST treatment. Dietary treatments had no effects on feed intake, daily energy intake and weaning-to-estrus interval in lactating sows. Litter size, litter weight at weaning and average daily gain of piglets were significantly greater in sows in HE1 compared with ST, however, no difference was observed between HE2 and ST. Increasing the nutrient levels had no effects on the blood urea nitrogen, glucose, triglyceride, and creatinine at post-farrowing and weaning time. The concentration of follicle stimulating hormone, cortisol and insulin were not affected by dietary treatments either in post-farrowing or weaning time. The concentration of blood luteinizing hormone of sows in ST treatment was numerically less than sows in HE2 treatment at weaning. Milk and colostrum compositions such as protein, fat and lactose were not affected by the treatments. Conclusion: An energy level of 3,400 kcal/kg (14.23 MJ/kg) with 166 g/kg crude protein is suggested as the optimal level of dietary nutrients for heat stressed lactating sows with significant beneficial effects on litter size.
참고문헌 (33)
- Quiniou N, "Influence of high ambient temperatures on performance of multiparous lactating sows", J Anim Sci, 77, pp.2124~2134 (1999)
- Muns R, "Effect of gestation management system on gilt and piglet performance", Anim Welf, 23, pp.343~351 (2014)
- Renaudeau D, "Effects of exposure to high ambient temperature and dietary protein level on performance of multiparous lactating sows", J Anim Sci, 79, pp.1240~1249 (2001)
- Williams AM, "Effects of a controlled heat stress during late gestation, lactation, and after weaning on thermoregulation, metabolism, and reproduction of primiparous sows", J Anim Sci, 91, pp.2700~2714 (2013)
- Dourmad JY, "Effect of protein and lysine supply on performance, nitrogen balance, and body composition changes of sows during lactation", J Anim Sci, 76, pp.542~550 (1998)
- Spencer J D, "Early-weaning to reduce tissue mobilization in lactating sows and provision of milk replacement to enhance pig wean weight during extreme heat stress", J Anim Sci, 81, pp.2041~2052 (2003)
- Boyd RD, "Recent advances in amino acid and energy nutrition of prolific sows—review", Asian-Australas J Anim Sci, 13, pp.1638~1652 (2000)
- L.J. Kong, "Peroxisome Proliferator-activated Receptor γIs Involved in Weaning to Estrus of Primiparous Sows by Regulating the Expression of Hormone Genes in Hypothalamus-pituitary-ovary Axis", ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 20(3), pp.340~350 (2007), 아세아·태평양축산학회
- Omtvedt IT, "Influence of heat stress during early, mid and late pregnancy of gilts", J Anim Sci, 32, pp.312~317 (1971)
- O’Grady JF, "Voluntary feed intake by lactating sows", Livest Prod Sci, 12, pp.355~365 (1985)
- Pettigrew JE, "Fat in swine nutrition", pp.133~145 (1991), Butterworth-Heinemann
- Stahly TS, "Effects of level and source of supplemental fat in the lactation diet of sows on the performance of pigs from birth to market weight", J Anim Sci, 51, pp.352~360 (1980)
- Averette LA, "Dietary fat during pregnancy and lactation increases milk fat and insulin-like growth factor I concentrations and improves neonatal growth rates in swine", J Nutr, 129, pp.2123~2129 (1999)
- Averette Gatlin LA, "Dietary medium- or long- chain triglycerides improve body condition of lean-genotype sows and increase suckling pig growth", J Anim Sci, 80, pp.38~44 (2002)
- Boyd RD, "Effect of tallow and choline chloride addition to the diet of sows milk composition, milk yield and preweaning pig performance", J Anim Sci, 54, pp.1~7 (1982)
- Cieslak DG, "Effect of a high fat supplement in late gestation and lactation on piglet survival and performance", J Anim Sci, 57, pp.954~959 (1983)
- NRC, "Nutrient requirements of swine" (2012), Natl Acad Press
- Baumgard LH, "Effects of heat stress on postabsorptive metabolism and energetics", Annu Rev Anim Biosci, 1, pp.311~337 (2013)
- SAS, "Statistical Analysis System. Users Guide: Statistics, Version 8.2", SAS Institute, ~ (2012)
- Rosero DS, "Sow and litter response to supplemental dietary fat in lactation diets during high ambient temperatures", J Anim Sci, 90, pp.550~559 (2012)
- Renaudeau D, "Effects of exposure to high ambient temperature and dietary protein level on sow milk production and performance of piglets", J Anim Sci, 79, pp.1540~1548 (2001)
- Silva BAN, "Effects of dietary protein level and amino acid supplementation on performance of mixed-parity lactating sows in a tropical humid climate", J Anim Sci, 87, pp.4003~4012 (2009)
- Renaudeau D, "Adaptation to hot climate and strategies to alleviate heat stress in livestock production", Animal, 6, pp.707~728 (2012)
- Stadler KJ, "Pork industry productivity analysis" (2013), National Pork Board
- Lauridsen C, "Lactational dietary fat levels and sources influence milk composition and performance of sows and their progeny", Livest Prod Sci, 91, pp.95~105 (2004)
- Briggs JL, "Effect of ingredients and processing parameters on pellet quality", Poult Sci, 78, pp.1464~1471 (1999)
- DeRouchey JM, "Effects of dietary electrolyte balance on the chemistry of blood and urine in lactating sows and sow litter performance", J Anim Sci, 81, pp.3067~3074 (2003)
- Van den Brand H, "Energy balance of lactating primiparous sows as affected by feeding level and dietary energy source", J Anim Sci, 78, pp.1520~1528 (2000)
- Tritton SM, "The effects of dietary protein and energy levels of diets offered during lactation on the lactational and subsequent reproductive performance of first-litter sows", Anim Sci, 62, pp.573~579 (1996)
- Strathe AV, "Sows with high milk production had both a high feed intake and high body mobilization", Animal, 15, pp.1~9 (2017)
- Kemp B, "Should weaning be the start of the reproductive cycle in hyper-prolific cows? A physiological view", Reprod Domest Anim, 47, pp.320~326 (2012)
- King RH, "Relationships between protein intake during lactation, LH levels and oestrous activity in first-litter sows", Anim Reprod Sci, 19, pp.283~292 (1989)
- Flowers B, "Alterations in gonadotropin secretion and ovarian function in prepubertal gilts by elevated environmental temperature", Biol Reprod, 42, pp.465~471 (1990)