İvesi Koyunlarda Kontrol Günü Verimlerinden Yararlanarak Laktasyon Verimini Tahmin Etme Metotları

Abstract

Bu çalışma, İvesi koyunları için hangi kontrol yönteminin gerçek laktasyon verimini temsil ettiğini belirlemek amacıyla yapılmıştır. Laktasyon süt veriminin belirlenmesinde kullanılan farklı kontrol yöntemleri (İsveç, Vogel, Hollanda I, Hollanda II, Trapez I, Trapez II ve Devlet Üretme Çiftliği) ve kontrol periyotları (14, 21, 28, 42 ve 56 günlük) karşılaştırılmıştır. Araştırmanın verilerini Halk Elinde Küçükbaş Hayvan Islahı Ülkesel Projesi kapsamında 2018 yılında Şanlıurfa’da 31 adet işletmeye ait toplam 3173 baş ivesi koyun kaydı oluşturmuştur. Araştırmada gerçek laktasyon verimi 255,570,85 kg ve laktasyon süresi 170,710,57 gün olarak tespit edilmiştir. Gerçek laktasyon verimi ile farklı kontrol yöntemlerine göre hesaplanan laktasyon verimleri arasındaki korelasyon katsayıları bütün kontrol periyotları ve kontrol yöntemleri için yüksek ve önemli bulunmuştur (p<0.05, p<0.01, p<0.001). Farklı kontrol yöntemlerine göre hesaplanan Vogel yönteminde 28 günlük periyotta, Trapez I yönteminde 28 ve 42 günlük periyotta, Trapez II yönteminde bütün periyotlarda gerçek laktasyon verimine en yakın sonuçları vermiştir (p>0.05). Diğer kontrol periyotlarında ise tüm yöntemler gerçek laktasyon veriminden önemli düzeyde farklılık göstermiştir (p<0.05, p<0.01, p<0.001). Sonuç olarak, Şanlıurfa şartlarında yetiştirilen İvesi koyunlarının kontrol günü süt verimlerinden yararlanarak hesaplanan Vogel veya Trapez I-II yöntemlerinden birinin kullanılması ile gerçek laktasyon verimine yakın sonuçlar alınacağı kanaatine varılmıştır.

Keywords

• İvesi
• kontrol metotları
• kontrol periyotları
• laktasyon süt verimi
• test günü

Methods of estimating lactation milk yield by using control day yields in Awassi sheep

Abstract

The objective of this study was to determine the effect of various milk control methods on prediction accuracy of lactation milk yield for Awassi sheep. Different control methods (Sweden, Vogel, Holland I, Holland II, Trapeze I, Trapeze II and State Production Farm methods) and control periods (14th, 21st, 28th, 42nd and 56th day) used to determine lactation milk yield were compared. The data of the research was created within the scope of the "National Project of Small Ruminant Animal Breeding in the Hands of the People" in 2018 and a total of 3173 sheep records belonging to 31 enterprises were used. The actual lactation yield in the study was determined as 255.570.85 kg and the lactation length as 170.620.19 day. Correlation coefficients between the actual lactation yield and lactation yield calculated according to different control methods were found to be high and significant for all control periods and control methods (P<0.05, P<0.01, P<0.001). It gave the similar results to the actual lactation yield in the Vogel method calculated according to different control methods in a period of 28th days, in the Trapeze I method in a period of 28th and 42nd days, in the Trapeze II method in all periods (P>0.05). In the other control periods, all methods differed significantly from the actual lactation yield (P<0.05, P<0.01, P<0.001). As a result, it has been concluded that results close to the actual lactation yield will be obtained by using one of the Vogel or Trapeze I-II methods calculated by using the milk yields on the control day of Awassi sheep raised under Şanlıurfa conditions.

Keywords

• Awassi
• control methods
• control periods
• lactation milk yield
• test day

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