Use this url to cite publication: https://hdl.handle.net/20.500.12512/117051
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Evaluation of milk yield and milk ability traits of Lithuanian red cows with different genotypes during lactation in organic farms / Renata Japertienė, Lina Anskienė, Sigitas Japertas
Type of publication
Tezės Scopus duomenų bazėje / Theses in Scopus database (T1a2)
Author(s)
Viešoji įstaiga Lietuvos sveikatos mokslų universiteto praktinio mokymo ir bandymų centras |
Title
Evaluation of milk yield and milk ability traits of Lithuanian red cows with different genotypes during lactation in organic farms / Renata Japertienė, Lina Anskienė, Sigitas Japertas
Extent
p. 91-91.
Is part of
Veterinarija ir zootechnika : 2nd international scientific conference “Livestock production: recent trends and future prospects” : 2022 November 16. Kaunas / Lithuanian University of Health Sciences. Veterinary Academy. Faculty of Animal Sciences : abstracts. Kaunas : Lietuvos sveikatos mokslų universiteto Veterinarijos akademija., 2022, vol. 80, suppl. 2.
Version
Originalus / Original
Field of Science
Abstract
Holstein cattle have been used for many decades for the breeding of other dairy cattle in order to increase milk production. Productivity of cows differs between organic and conventional herds; therefore, the ability of cows to adapt to an organic production environment has been questioned, whether these high-cost genotypes are suitable for organic farming systems. Organic dairy farming has grown, farmers have realised that many available conventional breeds of cows are not well adapted to new situations and that more robust cows are able to function well in the organic environment. The aim of this study was to investigate the milk yield and milk ability traits during lactation of Lithuanian red cows with different genotypes. The research was carried out in an organic farm in 2020 with dairy cows (n = 248) of Lithuanian red cattle population. The milk yield (MY), milking speed (MS), highest milk flow (HMF), and milking time (MT) were evaluated. Investigated traits were measured with DE Laval electronic milk meters, “Apro Windows” software. All records were between 5 and 330 days of lactation, with average 2.26 ± 0.44 of lactation. All cows had two milk-recording events per test day (morning and evening). Lactation of cows was divided into stages: (stage 1 – <= 60; stage 2 – 61–150; stage 3 – 151–240; an stage 4 – 241–330 days of lactation). The statistical analysis of data was performed using the SPSS 25.0 (SPSS Inc., Chicago, IL, USA) software. The highest number of cows was with LRxRHxRH genotype, which accounted for 37.83% (χ2 = 53.540, df = 1, P < 0.001) of all investigated cows. We observed that the highest MY and HMF in the organic farm was detected in cows with genotypes LRxAIxRH, LRxHxH and LRxRHxRH in the first and the second stages of lactation (P < 0.05). MT of LRxHxH, LRxRHxDR and LRxAIxRH genotype cows during all stages of lactation was longer, compared to cows of other genotypes (P < 0.05). We estimated that of all fixed effects the biggest influence on MS, HMF, MT (P < 0.001) and MY was by a genotype of cows (P < 0.01), while the stage of lactation showed the highest impact on MY, HMF, MT (P < 0.001) and MS (P < 0.01). Analysis of different genotypes of cows revealed that local breeds are well-adapted and more suitable for organic farming.
Type of document
type::text::conference output::conference proceedings::conference paper
ISSN (of the container)
1392-2130
2669-2511
Other Identifier(s)
(LSMU ALMA)991693886707106
Coverage Spatial
Lietuva / Lithuania (LT)
Language
Anglų / English (en)
Journal | Cite Score | SNIP | SJR | Year | Quartile |
---|---|---|---|---|---|
Veterinarija ir Zootechnika | 0.2 | 0.124 | 0.128 | 2022 | Q4 |