نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد گروه علوم دامی، دانشکده علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.
2 استادیار گروه علوم دامی، دانشکده علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.
3 دانشیار گروه علوم دامی، دانشکده علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.
چکیده
اثر فضای آخور و اندازه ذرات خوراک بر مقدار مصرف و قابلیت هضم مواد مغذی جیره با استفاده از از 40 راس گوساله در حال رشد هلشتاین با میانگین وزن 32/8±295/6 کیلوگرم در طرح چرخشی با آرایه فاکتوریل 2×2 (با چهار تیمار، چهار دوره و چهار بهاربند) شامل فاکتور فضای آخور (24 و 48 سانتیمتر) و فاکتور اندازه ذرات علوفه (4/6 و 7/1 میلی متر) بررسی شد.. تیمارها در این آزمایش شامل: 1) تیمار با 24 سانتیمتر فضای آخور و میانگین اندازه ذرات علوفه 4/6 میلی‌متر (24/ریز)، 2) تیمار با 24 سانتیمتر فضای آخور و میانگین اندازه ذرات علوفه 7/1 میلی‌متر (24/درشت)، 3) تیمار با 48 سانتیمتر فضای آخور و میانگین اندازه ذرات علوفه 4/6 میلی‌متر (48/ریز)، 4) تیمار با 48 سانتیمتر فضای آخور و میانگین اندازه ذرات علوفه 7/1 میلی‌متر (48/ درشت) بود. در رابطه با اثرات متقابل نشان داده شد که قابلیت هضم ظاهری ماده خشک، ماده آلی، پروتئین خام و الیاف نامحلول در شوینده خنثی برای تیمار 48/درشت در مقایسه با سایر تیمارها بطور معنی داری بیشتر بود (p<0/05). قابلیت هضم ماده خشک، پروتئین خام و الیاف نامحلول در شوینده خنثی برای تیمارهای حاوی علوفه با اندازه درشت از تیمارهای حاوی علوفه با اندازه ریز بیش تر بود (p<0/05). در نهایت این که تغذیه گوساله های ماده در حال رشد با جیره حاوی علوفه های با اندازه درشت، ضمن کمک به ایجاد محیط شکمبه ای سالم تر ، قابلیت هضم مواد مغذی را افزایش می دهد.
کلیدواژه‌ها
عنوان مقاله [English]
The study of effects of feed bunk space and forage particle size on digestibility and fecal properties in Holstein female calves
نویسندگان [English]
- Ayub Mohammadi 1
- Farhang Fatehi 2
- Abolfazl Zali 3
- Mehdi ganjkhanlou 3
- Amirhossein Sarzaem 1
1 MSc Student, Department of Animal Science, Faculty of agricultural science and engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran. PC: +983158777871
2 Department of Animal Science, Faculty of agricultural science and engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran. PC: +983158777871
3 Associate Professor, Department of Animal Science, Faculty of agricultural science and engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran. PC: +983158777871
چکیده [English]
The objective of this study was to evaluate the effects of feed bunk space and forage particle size on feed intake and nutrient digestibility in growing Holstein female calves. Fourty Holstein female calves with an average age of 8-12 months (295.6 ± 32.8 kg) were used in a 2×2 factorial change-over design (with four treatments, four periods and four stalls), in which 10 calves were allocated to each stall. The current experiment lasted 4 months as one month allocated to each period. The experimental treatments were included: 1) 24 cm of feed bunk space and average forage particle size of 4.6 mm (24/fine); 2) 24 cm of feed bunk space and average forage particle size of 7.1 mm (24/coarse); 3) 48 cm of feed bunk space and average forage particle size of 4.6 mm (48/fine); 4) 48 cm of feed bunk space and average forage particle size of 7.1 mm (48/coarse). The results of this study showed that the apparent digestibilities of DM, CP and NDF for the 48/Coarse treatment was the highest, the treatment of 24/Coarse had an intermediate state, and for the treatment of 48/fine and 24/fine were the lowest. Also, apparent digestibilities of DM, CP and NDF were higher for treatments including coarse forage particles than treatments with fine forage particle size. Finally, it seems that feeding growing Holstein heifers with diets containing coarse forage particle size could result in better nutrient digestibility.
کلیدواژه‌ها [English]
- Calves
- Fecal Characteristic
- Feed bunk space
- Forage particle size
- Nutrient digestibility
2. Belyea RL, Martz FA and Mbagaya GA (1989) Effect of Particle Size of Alfalfa Hay on Intake, Digestibility, Milk Yield, and Ruminal Cell Wall of Dairy Cattle1. Journal of dairy science 72 (4): 958-963.
3. Chemists AA (1990) Official methods of analysis. Vol. I. 15th ed. AOAC, Arlington, VA.
4. DeVries TJ, Beauchemin KA and Von Keyserlingk MAG (2007) Dietary forage concentration affects the feed sorting behavior of lactating dairy cows. Journal of dairy science 90(12): 5572-5579.
5. DeVries TJ, Von Keyserlingk MAG, Weary DM and Beauchemin KA (2003) Measuring the feeding behavior of lactating dairy cows in early to peak lactation. Journal of Dairy Science 86(10): 3354-3361.
6. DeVries TJ and Keyserlingk MAG (2009) Competition for feed affects the feeding behavior of growing dairy heifers. Journal of dairy science 92 (8): 3922-3929.
7. Fatehi F, Krizsan SJ, Gidlund H and Huhtanen P (2015) A comparison of ruminal or reticular digesta sampling as an alternative to sampling from the omasum of lactating dairy cows. Journal of dairy science 98(5): 3274-3283.
8. Greter A M, Leslie KE, Mason GJ, McBride BW, and Devries TJ (2010) Feed delivery method affects the learning of feeding and competitive behavior in dairy heifers. In Journal of dairy science 93 (8), pp. 3730–3737. DOI: 10.3168/jds.2009-2978.
9. Hall MB (2015) Determination of dietary starch in animal feeds and pet food by an enzymaticcolorimetric method. Collaborative study. In Journal of AOAC International 98 (2): 397-409.
10. Hartnell GF, Hatfield RD, Mertens DR and Martin NP (2005). Potential benefits of plant modification of alfalfa and corn silage to dairy diets. In Proceding Southwest Conference on Nutrition and Management, Tucson, AZ, USA 156-172.
11. Hummel J, Sudekum KH, Streich WJ and Clauss M (2006) Forage fermentation patterns and their
implications for herbivore ingesta retention times. In Functional Ecology 20(6): 989-1002.
12. Hutjens M (1999) Evaluating Manure on the Farm Extension Dairy Specialist, University of Illinois, Urbana.
13. Institute SAS (2011) SAS/IML 9.4 user's guide: Sas Institute.
14. Jaster EH and Murphy MR (1983) Effects of Varying Particle Size of Forage on Digestion and Chewing Behavior of Dairy Heifers1. Journal of Dairy Science 66(4): 802-810.
15. Kitts BL, Duncan IJH, McBride BW and DeVries TJ (2011) Effect of the provision of a low-nutritive feedstuff on the behavior of dairy heifer’s limit fed a high-concentrate ration. Journal of dairy science 94(2): 940-950.
16. Kononoff PJ, Lehman HA and Heinrichs AJ (2002) Technical note-a comparison of methods used to measure eating and ruminating activity in confined dairy cattle. Journal of dairy science 85(7): 1801-1803.
17. Kononoff PJ and Heinrichs AJ (2003) The Effect of Reducing Alfalfa Haylage Particle Size on Cows in Early Lactation. In Journal of dairy science 86(4): 1445-1457.
18. Krause KM and Combs DK (2003) Effects of forage particle size, forage source, and grain fermentability on performance and ruminal pH in midlactation cows. Journal of dairy science 86(4): 1382-1397.
19. Lammers BP, Buckmaster DR and Heinrichs AJ (1996) A simple method for the analysis of particle sizes of forage and total mixed rations. Journal of Dairy Science 79(5): 922-928.
21. Mgbeahuruike AC, Nørgaard P, Eriksson T, Nordqvist M and Nadeau E (2016) Faecal characteristics and milk production of dairy cows in early-lactation fed diets differing in forage types in commercial herds. Acta Agriculturae Scandinavica, Section A-Animal Science 66(1): 8-16.
22. Mohammadi A, Fatehi F, Zali A and Ganjkhanloo M, (2018) The investigation of interaction effects of feed bunk space and forage particle size on performance and feed consumption intensity within hours after feed delivery in Holstein female calves. Journal of Animal Sciences Researches, 28(4): 83-98. (in Persian)
23. Nasrollahi SM, Khorvash M, Ghorbani GR, Teimouri-Yansari A, Zali A and Zebeli Q (2012) Grain source and marginal changes in forage particle size modulate digestive processes and nutrient intake of dairy cows. Animal: an international journal of animal bioscience 6 (8): 1237-1245.
24. National Research Council )2001( Nutrient requirements of dairy cattle: Washington, DC: National Academy Press.
25. Teimouri Yansari A, Valizadeh R, Naserian A, Christensen DA, Yu P and Eftekhari Shahroodi F (2004) Effects of Alfalfa Particle Size and Specific Gravity on Chewing Activity, Digestibility, and Performance of Holstein Dairy Cows. Journal of dairy science 87(11): 3912-3924.
26. Van Keulen J and Young BA )1977( Evaluation of acid-insoluble ash as a natural marker in ruminant digestibility studies. Journal of animal science 44: 282-287
27. Van Soest PV, Robertson JB and Lewis BA (1991) Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition. Journal of dairy science 74(10): 3583-3597.
28. Wang HR, Chen Q, Chen LM, Ge RF, Wang MZ, Yu L.H and Zhang J (2017) Effects of dietary physically effective neutral detergent fiber content on the feeding behavior, digestibility, and growth of 8- to 10-month-old Holstein replacement heifers. Journal of dairy science 100(2): 1161-1169.
29. Zebeli Q, Tafaj M, Junck B, Ölschläger V, Ametaj B.N and Drochner W (2008) Evaluation of the response of ruminal fermentation and activities of nonstarch polysaccharide-degrading enzymes to particle length of corn silage in dairy cows. Journal of dairy science, 91(6): 2388-2398.
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