Lactation Curve Trail:s of Native Buffaloes

Abstract

In this study, traits of the lactation curves of N ıı tive Buffaloes raised at the Afyon Kocatepe State Farm were determined. The shape and type of lactation curves were d .scribed by the parameters of Gamma function of Y, = A tb e-ct. 10.4 percent of lactation curves were atypical. The dis:ributions of typical and atypical lactation curves ware depended upon the lactation season P0.05 depended upon the lactation number. Least squares means were found to be 2756.5±0.403 g for A parameters beginning yield , 0.713±0.128 for b parameters coefficient of rising , 0.15174t0.06033 for c pa •ameters coefficient of decreasing , 7.27±0.12 for S parameters persistency , 6086.75±146.77 g for Y,„a„ parameter. Average of maximum daily peak yield , 104.56±36.22 days for Ta,ax parameters average of daily peak yield length , respectively. Effect of calving year on Y,,,ax were highly significant F

Keywords

• Lactation curve, lactation persistency, buffalo

Yerli Mandaların Laktasyon Eğrisi Özellikleri

Abstract

Bu çal ışmada Afyon Kocatepe Tar ı msal Araşt ı rma Enstitüsünde yeti ştirilen yerli mandalann laktasyon e ğ risi özellikleri belirlenmi ştir. Laktasyon egrisi tipleri ve şekilleri Gamma fonksiyonu Y, = A tb parametreleriyle belirlenmi ştir. Incelenen laktasyonlar ı n % 10,4% tipik olmayan l ı ktasyon eğ risi karakterindedir A, b, c negatif . Tipik ve tipik olmayan laktasyonlann laktasyon s ı ras ı na göre dağı l ı mı «lemsiz P>0.05 , laktasyona ba şlama mevsimine göre dağı l ı m ı çok önemli P

Keywords

• Laktasyon eğ risi, laktasyon devamlılığı , manda

References

1. Anonim, 1996. Tar ı msal Yap ı ve Üretim, DIE Ba şkanl ığı , Ankara. Cheema, J.S. and S.B. Basu, 1991. Factors Affecting the Components of Gamma Type Lactation Curve in Murrah Buffaloes. lndian Journal of Dairy Sci. 44 : 137-139.
2. Dhaka, S.S. and S.R. Chaudhary, 1994. Non-Genetic Factors influencing Persistency of Lactation in Murrah Buffaloes. Indian Journal of Animal Research. 28 : 117-121.
3. Draper, N. and Smith, N. 1966. Applied Regression Analysis. John Wiley and Sons, Inc. New York, USA, vii+317 pp.
4. Duncan, D.B. 1955. Multiple Range and Multiple F Tests. Biometrics, 11 : 1-42.
5. Gajbhiye, P.U. and V.N. Tripathi, 1992. Factors Affecting Persistency of First Lactation in Murrah Buffaloes. Buffalo Journal, :109-116.
6. Godara, P. and S.B.S. Yadav, 1992. Factors Causing Fluctations in Progressive Milk Records of Murrah Buffaloes. Indian Journal of Dairy Sci. 45 : 70-75.
7. Gondal, K.Z. and P. Rowlinson, 1984. Characterization of the Lactation Curve in Pakistani Buffaloes. British Society of Animal Production. Winner Meeting. 26-28 March 1984, Grand Hotel, Scarborough.
8. Gondal. K.Z. 1987. Analysis of the Lactation Curve of Pakistani Dairy Buffaloes. Index to Thesis Accepted for Higher Degrees in the Universities of Great Britain and Ireland, 36 : 379.

9. Harvey, W.R. 1986. Least Squares Analysis of Data With Unequal Subclass, A.R.S. 20-28, USDA.
10. İ brahim, M.A.M. 1995. The Use of Gamma Type Function in Describing the Lactation Curve of Egyptian Buffaloes. Egyptian Journal of Animal Production, 32 : 113-123.
11. İ laslan, M., A. Karabulut, Y. Aş k ı n, ve A.N. Izgi, 1983. Yerli Mandalarda Vücut Yap ı s ı , Dal ve Süt Verimi Üzerinde Araşt ı rmalar. Afyon Zirai Ara şt ı rma Istasyonu, Yay ı n No : 14, Afyon.
12. İ laslan, M., F. Cengiz, ve Y. Aşk ı n. 1992. Ankara Ç ı nar Köyünde Yetiştirilen Yerli Mandalarda Süt Verimi ve Vücut Yap ı s ı ile ilgili Özellikler. C.Ü. Tokat Zir. Fak. Yay. 9 : 1-12.
13. Juma, K.H., S.I. Said, and C.A. Baghdasar, 1993. Iraqi Buffaloes. III. Persistency of Lactation. Buffalo Bulletin. 12 : 55-58.
14. Khan, F.H. and K.S. Johar, 1985. Persistency of First and Second Lactations in Murrah Buffaioes. Indian Journal of Animal Sci. 55 : 201-203.
15. Khan, M.Q., A.Z. Ali. and S.S. Pingle, 1983. Effect of Month Calving on Persistency of Lactations in Murrah Buffaloes. Livestock Adviser. 8 : 36-39.
16. Kumar, D., 0.P. Sharma and V.P., Manglik, 1992. A Stochastic Model to Describe the Milk Yield Buffaloes. lndian Journal of Dairy Sci. 62 : 591-592.
17. Kumar, D., 0.P. Sharma and V.P., Manglik, 1993. Lactation Curve Models Used for Different Age of Buffaloes. lndian Veterinery, 70 : 431-433.
18. Malhotra, P.K., 0.P. Dutta and J.C. Malhotra, 1984. Persistency of Mili< Yield of Murrah Buffaloes Registired in the Herdbook Under Village Conditions. lndian Journal of Animal Sci. 54 : 145-148.
19. Metry, G.H., K.A. Mourad, J.C. Wilk and B.T. McDaniel, 1994. Lactation Curves for First Lactat ı on Egyptian Buffalo. lndian Journal of Dairy Sci. 77 : 1306-1314.
20. Shanks, R.D., A.J. Berger, A.E. Freeman and F.N. Dickinson, 1981. Genetic Aspects of Lactation Curves. J. Dairy Sci. 64 : 1852-1860.
21. Shimuzu, H. and S. Umrod, 1976. An Application of the Weighed Regression Procedure for Constructing the Lactation Curve in Dairy cattle. Japan J. Zoot. Sci. 47 : 733-738.
22. Şahin, M. ve M. Büyükkebabc ı . 1997, Dünya'da ve Türkiye'de Mandac ı l ı k. Tar ı m ve Kayiş leri Bakanl ığı , Kocatepe Tanmsal Araşt ı rma Enstitüsü, Hizmet içi Eğ itim Semineri, 7 Ocak 1997, Afyon.
23. Uslu, N.T. 1970. Afyon Bölgesi Mandalann ı n Çeş itli Özellikleriyle Rasyonel ve Köy Şartlar ı nda Süt Verimleri Üzerinde Mukayeseli Ara şt ı rmalar. 81 sayfa, Birlik Matbaas ı , Bornova.
24. Vij, P.K., M.S. Tiwana ana M.S., Bhullar, 1985. Factors Affecting Shape of Lactation Curve in Buffaloes. Asian Journal of Dairy Research, 4 : 111-115.
25. Wood, P.D.P. 1967. Algebraic Model of Lactation Curve in Cattle. Nature 218 : 164-165.
26. Yarkin, İ . 1952. Anadolu Mandalar ı üzerinde Ara şt ı rmalar. A.Ü. Ziraat Fak. Yı ll ığı , 1-3 : 1-21.