تأثیر غلظت انرژی جیره دوره خشکی بر تولید و ترکیب شیر گاوهای هلشتاین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم دامی دانشگاه زنجان

2 کارشناس ارشد جهاد کشاورزی

چکیده

تاثیر انرژی جیره در دوره خشکی بر تولید و ترکیب شیر گاوهای هلشتاین، با استفاده از 2143 راس گاو هلشتاین مطالعه شد. سه سطح از انرژی خالص شیردهی در دوره­ی دور از زایش و نزدیک به زایش، به ترتیب 55/1، 45/1، 35/1 و 65/1، 54/1، 44/1مطالعه شد. آمار توصیفی گله­ها و گاوها گزارش شد. اثر انرژی جیره­های دور از زایش بر تولید و ترکیب شیر تا 120 روزگی معنی­دار  نبود  ولی در کل دوره شیردهی، تولید شیر با افزایش غلظت انرژی جیره افزایش خطی داشت (05/0P <).  اثر انرژی جیره­های نزدیک به زایش بر تولید و ترکیب شیر تا 120 روزگی معنی­دار نبود ولی در کل دوره شیردهی با افزایش غلظت انرژی جیره نزدیک به زایش تولید شیر به طور خطی افزایش (05/0P <) و درصد چربی شیر کاهش یافت (05/0P <).  با افزایش غلظت انرژی جیره های دور و نزدیک به زایش تعداد سلول­های بدنی افزایشی خطی نشان داد (01/0P <).  نتایج این پژوهش نشان داد افزایش غلظت انرژی در دوره خشکی سبب افزایش تولید شیر و کاهش غلظت چربی شیر و افزایش تعداد سلول­های بدنی شد و تغییرات ترکیب شیر در کل دوره شیردهی مستقل از انرژی جیره­ها در دوره خشکی بود و تابعی از مقدار تولید شیر در دوره شیردهی می­باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effects of dietary energy density in the dry period on milk yield and content of Holstein cows

چکیده [English]

This study was conducted to investigate the effects of energy density in dry period on subsequent milk production. Milk production and milk components of 2143 milking cows were used and NEl of the far-off and close-up period’s diets were 1.35, 1.45, 1.55, and 1.44, 1.54, 1.65 Mcal/kg of dry matter. Descriptive statistics of herds were described. The results were showed as least square and standard error of means in early lactation (120 day) and whole lactation period. As energy density increased in the far-off and close-up periods, there was no difference in milk yield in early lactation period, but there was a linearly increase in whole lactation period (P < 0.05). Milk composition until 120 d didn’t changed with increasing energy density in the far-off diets, but milk fat percentage was linearly decreased (P < 0.05) in whole period by increasing dietary energy in far-off and until 120 d and whole lactation period (P < 0.05) by the close-up diets. There was a linearly increase in somatic cell count in early and whole period with increment energy density in the far-off and close-up diets. Generally, increasing energy density in dry period improved milk production and increased somatic cell count, and less milk fat content over lactation period might be independent of the dry period diet and it’s a function of length of lactation and milk amount.

کلیدواژه‌ها [English]

  • Close-up
  • Dry cow
  • dry period
  • Far-off
  • Net energy for lactation
هاشمی س ع (1393) رابطه کمی وضعیت انرژی گاوهای خشک با بروز ناهنجاریهای متابولیکی و تولید شیر گاوهای هلشتاین در اوایل دوره شیردهی. پایانامه کارشناسی ارشد دانشگاه زنجان.
2. Allen MS, Piantoni P (2013) Metabolic control of feed intake: Implications for metabolic disease of fresh cows. Vetrinary Clinics North of America. Food Animal  Practice;29:279–297.
3. Berry DP, Lee MJ, Macdonald KA, Stafford K, Matthews L and Roche JR (2007) Associations among body condition score, body weight, somatic cell count, and clinical mastitis in seasonally calving dairy cattle. Journal of Dairy Science. 90:637–648.
4. Burvenich, C, Bannerman DD, Lippolis JD, Peelman L, Nonnecke BJ, Kehrli ME, and Paape MJ (2007) Cumulative physiological events influence the inflammatory response of the bovine udder to Escherichia coli infections during the transition period. Journal of Dairy Science. 90(E Suppl.):E39–E54.
5. Dann HM, Litherland NB, Underwood JP, Bionaz M, Angelo AD, Mcfadden JW and Drackley JK (2006) Diets during far-off and close-up dru periods affect periparturient metabolism and lactation in multiparous cows. Journal of Dairy Science.  89:3563-3577.
6. Douglas GN, Drackley JK, Overton TR and Bateman HG (1998) Lipid metabolism and production by Holstein cowsfed control or high fat diets at restricted or ad libitum intakes during the dry period. Journal of  Dairy Science. 81(Suppl. 1):295(Abstr.).
7. Drackley JK (1999) Biology of dairy cows during the transition period: the final frontier? Journal of  Dairy Science. 82(11):2259-2273.
8. Grummer RR, Mashek DG, Hayirili A (2004) Dry matter intak and enery balance in the transition period. Vetrinary Clinics North of America. Food Animal  Practice 20:447-470.
9. Hand KJ, Godkin MA, Kelton DF (2012) Short communication: Bulk milk somatic cell penalties in herds enrolled in Dairy Herd Improvement programs. Journal of  Dairy Science. 95 :240–242
10. Holcomb CS, Van Horn HH, Head HH, Hall MB, and Wilcox CJ (2001) Effects of prepartum dry matter intake and forage percentage on postpartum performance of lactating dairy cows. Journal of  Dairy Science. 84:2051-2058.
11. Janovick, NA, Boisclair YR and Drackley JK (2011) Prepartum dietary energy intake affects metabolism and health during the periparturient period in primiparous and multiparous Holstein cows. Journal of  Dairy Science. 94:1385–1400.
12. LeBlanc SJ, Lissemore KD,  Kelton DF, Duffield TF, and Leslie KE (2006) Major advances in disease prevention in dairy cattle. Journal of Dairy Science. 89:1267–1279.
13. Mann S, Yepes FA, Overton TR, Wakshlag JJ, Lock AL, Ryan CM and Nydam DV (2015) Dry period plane of energy: Effects on feed intake, energy balance, milk production, and composition in transition dairy cows. Journal of Dairy Science. 98:3366–3382.
14. Mashek, DG and Beede DK (2001) Peripartum responses of dairy cows fed energy-dense diets for 3 or 6 weeks prepartum. Journal of Dairy Science. 84:115–125.
15. McArt JA, Nydam DV and Oetzel GR (2013) Dry period and parturient predictors of early lactation hyperketonemia in dairy cattle. Journal of Dairy Science. 96:198–209.
16. McArt JA, Nydam DV, Oetzel GR, Overton TR and Ospina PA (2013) Elevated non-esterified fatty acids and betahydroxybutyrate and their association with transition dairy cow performance. Veterinary Journal. 198:560–570.
17. Minor DJ, Trower SL, Strang BD, Shaver RD and Grummer RR (1998) Effects of nonfiber carbohydrate and niacin on periparturient metabolic status and lactation of dairy cows. Journal of Dairy Science. 81:189–200.
18. Nielsen TS, Jessen N, Jorgensen JO, Moller N and Lund S (2014) Dissecting adipose tissue lipolysis: Molecular regulation and implications for metabolic disease. Journal of Molecular Endocrinology. 52: R199-222.
19. Olsson G, Emanuelson M and Wiktorsson H (1998) Effects of different nutritional levels prepartum on the subsequent performance of dairy cows. Livestock Production Science. 53:279-290.
20. Palmquist, DL, Beaulieu AD, and Barbano DM (1993) Feed and animal factors influencing milk fat composition. Journal of Dairy Science.76:1753–1771.
21. Rabelo E, Rezende RL, Bertics SJ and Grummer RR (2003) Effects of transition diets varying in dietary energy density on lactation performance and ruminal parameters of dairy cows. Journal of Dairy Science. 86:916-925.
22. Schoenberg KM and Overton TR (2011) Effects of plane of nutrition and 2,4-thiazolidinedione on insulin responses and adipose tissue gene expression in dairy cattle during late gestation. Journal of Dairy Science. 94:6021–6035.
23. Shock DA, LeBlanc SJ, Leslie KE, Hand K, Godkin MA, Coe JB and Kelton DF (2015) Exploring the characteristics and dynamics of Ontario dairy herds experiencing increases in bulk milk somatic cell count during the summer. Journal of Dairy Science. 98:3741–3753. 2015.
24. Zhang L, Boeren SS, van Hooijdonk ACM, Vervoort JM, and Hettinga KA (2015) A proteomic perspective on the changes in milkproteins due to high somatic cell count. Journal of Dairy Science. 98:5339–5351.
25. Zhang Q, Su H, Wang F, Cao Z and Li S (2015) Effects of energy density in close-up diets and postpartum supplementation of extruded full-fat soybean on lactation performance and metabolic and hormonal status of dairy cows. Journal of Dairy Science. 98:7115–7130.