SavedAdd your journal

Journals / Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi / 2019 / Cilt: 36 - Sayı: 2

Comparison of Different Lactation Models for Holstein Friesian Cows

YALÇIN TAHTALI
Reha İLERİ
Pages
124–128
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In the study, it was determined that the Cobby and Le Du model with the minimum MSE, maximum R2 and minimum dw were the best models for estimating lactation curves for Holstein cattle at the Kazova Vasfi Diren Agriculture Facilities.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study carried out parameter estimations of the lactation curve of 371 lactation records that were obtained from 176 Holstein Friesian cows in the period of 2004-2009 at the Kazova Vasfi Diren Agriculture Facilities using three different models (Wood, Cobby and Le Du and Wilmink).
📊
Key Findings & Data:For this purpose, coefficient of determination (R2), mean squared error (MSE) and Durbin-Watson (dw) values were used to determine the best model.
💡
Conclusion & Impact:In the study, it was determined that the Cobby and Le Du model with the minimum MSE, maximum R2 and minimum dw were the best models for estimating lactation curves for Holstein cattle at the Kazova Vasfi Diren Agriculture Facilities.
🔬Design:Modeling & Simulation
📍Scope:2004-2009 Verileri
⚙️Variables:Cobby and Le du · Holstein · Lactation curve

Abstract

This study carried out parameter estimations of the lactation curve of 371 lactation records that were obtained from 176 Holstein Friesian cows in the period of 2004-2009 at the Kazova Vasfi Diren Agriculture Facilities using three different models (Wood, Cobby and Le Du and Wilmink). For this purpose, coefficient of determination (R2), mean squared error (MSE) and Durbin-Watson (dw) values were used to determine the best model. The highest coefficient of determination for the Wood model was found as 0.96 in the 3th lactation, while the mean squared error was found as 37,75. For the Cobby and Le Du model, the highest coefficient of determination value and mean squared error were found as 0.96 and 37,43 in the 3th lactations, respectively. For the Wilmink model, the highest coefficient of determination and the lowest mean squared error value were found as 0.45 and 40.49 respectively. In the study, it was determined that the Cobby and Le Du model with the minimum MSE, maximum R2 and minimum dw were the best models for estimating lactation curves for Holstein cattle at the Kazova Vasfi Diren Agriculture Facilities.

🔖

Cite This Article

TAHTALI, Y., İLERİ, R. (2019). Comparison of Different Lactation Models for Holstein Friesian Cows. Gaziosmanpaşa Üniversitesi Ziraat Fakültesi Dergisi, Cilt: 36 - Sayı: 2, 124–128. https://ajindex.com/articles/224498

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (12)

  1. Bouallegue MN, M’hamdi M, Ben H, Haddad B (2014). Study of non-genetic factors on the shape of lactation curves for milk yield, fat and protein percents of Holstein-Friesian cows under hot Mediterranean climate. Archiva Zootechnica, 17: 55-75.
  2. Çagan V, Ozyurt A (2008). Polatlı Tarım İşletmesinde Yetiştirilen Siyah Alaca Sığırlarda Laktasyon Eğrisine İlişkin Parametrelerin Tahmini. Hayvansal Üretim, 49(1): 5-12.
  3. Cankaya S, Unalan A (2008). Jersey Sığırlarında Süt Verimine Ait Genetik Parametrelerin Farklı Yöntemlerle Tahmini ve En İyi Laktasyon Eğrisi Modelinin Belirlenmesine Yönelik Pilot Çalışma: Karaköy Tarım İşletmesi. Proje Kesin Raporu, Proje No: 107 O 338. Samsun. Cobby JM, Le Du, YLP (1978). On Fitting Curves To Lactation Data. Animal Production. 26: 127-133.
  4. Ertugrul O, Orman NM. (1999). Holstein İneklerin Süt Verimlerinde Üç Farklı Laktasyon Modelinin İncelenmesi. Turkish Journal of Veterinary And Animal Sciences, 23: 605–614.
  5. Ertugrul O, Orman NM, Guneren G (2001). Holstain Irkı İneklerde Süt Verimine Ait Bazı Genetik Parametreler. Turkish Journal of Veterinary And Animal Sciences, 26: 463–469.
  6. Esenboga N, Bilgin OC (2004). İvesi Koyunlarının Laktasyon Eğrisinin Tahmini ve Tanımlanması için Farklı Matematik Modellerin Mukayesesi, IV. Ulusal Zootekni Bilim Kongresi, 1–4
  7. Eylül, Isparta, 166–169.
  8. Ferris TA, Mao I, Anderson CR (1985). Selecting For Lactation Curve and Milk Yield İn Dairy Cattle. Dairy Science. Abstract, 47: 670. Kaygisiz A, Vanli Y, Yılmaz I (2003). Esmer Sığırların Laktasyon Eğrisi Özellikleri Üzerine Bir Araştırma, Hayvansal Üretim Dergisi, 44 (2), 69–80.
  9. Kaygisiz A, Orhan H (2002). Siyah Alaca Sığırlarda Farklı Laktasyon Eğrisi Modellerinin Karsılastırılması. Hayvansal Üretim Dergisi, 43(1): 94-99.
  10. Kaygisiz A, Orhan H (1999). Siyah Alaca Sığırlarda Farklı Laktasyon Eğrisi Modellerinin Karşılaştırılması. Kahramanmaraş Sütçü İmam Üniversitesi Araştırma Fonu Başkanlığı Proje Kesin Raporu. Kahramanmaraş. Keskin I, Cilek S, İlhan F (2009). Polatlı Tarım İşletmesinde Yetiştirilen Siyah Alaca Sığırların Laktasyon Eğrisi Özellikleri. Kafkas Univ. Veteriner Fakültesi Dergisi, 15 (3): 437-442.
  11. Keskin I, Tozluca A (2004). Süt Sığırlarında Laktasyon Eğrilerinin Farklı Matematik Modellerle Belirlenmesi ve Kontrol Aralığının Tespiti, Selçuk Üniversitesi, Ziraat Fakültesi Dergisi, 18, 11-19
  12. Orhan H, Kaygısız A (2002). Siyah Alaca Sığırlarda Farklı Laktasyon Eğrisi Modellerinin Karşılaştırılması. Hayvansal Üretim Dergisi, 43(1): 94–99. Orman MN,