Reproductive and Productive Indicators of Holstein-Friesian Cows Grown in Cubical Technology

Popov, Georgi; Shindarska, Zapryanka; Ralchev, I.

doi:10.20546/ijcmas.2016.504.033

Cited by 1 publication

(1 citation statement)

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“…According to Cilek (2009), the interval from calving for Holstein cows in Turkey were 111.6±3.7, somewhat less than those registered for the CPL cows in our study, but the DOP in the Turkish Holstein cows were higher at 149.6±4.4 than in our CPL group and lower than in the CON group. Popov et al (2016) found that DOP in first lactation was 141.6±13.3 and shorter in the third lactation at 126.7±15, similar to the median days open (123 days) in Iranian Holstein cows (Bahonar et al 2009), while in South Africa the average DOP in HF cows was 133.9 (Muller et al 2014).…”

Section: Discussionsupporting

confidence: 60%

Polish Journal of Veterinary Sciences

Đuričić

Vince

Lojkić

et al. 2020

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The objective of this study was to evaluate the effects of dietary zeolite clinoptilolite on reproductive performance, serum progesterone and insulin-like growth factor 1 (IGF-1) concentrations in 78 Holstein Friesian (HF) cows during pregnancy and lactation. The cows were divided into two groups comprising 40 (control group; CON) and 38 (CPL group) cows. To assess reproductive performance of HF cows the following variables were registered: the interval from calving to first insemination (days open to first service, DFS), the interval from calving to pregnancy (days open to pregnancy, DOP), and the number of services per pregnancy (NSP). The average values of progesterone (5.64±0.59 ng/mL vs. 5.16±0.64 ng/mL) were not statistically different (p<0.05) and IGF-1 levels (400.17±17.72 ng/mL vs. 348.36±20.39 ng/mL) were higher in the CON than in the CPL group which received 50 g of clinoptilolite twice a day. However, in the CPL group ovarian cyclity resumed on days 40 and 60 postpartum. In addition, DFS (p<0.05) and DOP (p>0.05) were shorter in the CPL than in the CON group (115.1±19.9 and 137.5±36.3 days vs. 124.2±17.3 and 143.8±33.5 days, respectively). During 305 days of lactation, milk production was higher in the CPL vs. CON (8325.5±628.8 kg vs. 8050±586.8 kg). The NSP was lower in the CPL than in CON group (1.91 vs. 2.14). The dietary clinoptilolite supplement had a positive influence on milk yield, exhibited modulating effects on endocrine status of dairy cows, and improved reproductive performance, with the decreased NSP, and fewer DFS and DOP.

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Section: Discussionsupporting

confidence: 60%