POTENȚIALUL REPRODUCTIV LA VACILE DE IMPORT ȘI AUTOHTONE EXPLOATATE PENTRU PRODUCȚIA DE LAPTE ÎN REPUBLICA MOLDOVA
Abstract
Abstract. The results of the investigation of main reproduction indices of populations of imported (Holstein breed) and indigenous (Moldovan type of Black-Motley breed) cows are presented. The functionality of the reproductive system in the herd of cows of Moldovan type of Black-Motley breed is clearly superior compared to the Holstein cows populations. In all investigated populations the service-period correlates very strongly positively with the duration of calving interval, very strongly negatively with the coefficient of reproductive capacity of cows and very weakly positively with the duration of lactation. Positive and partially very weak negative correlative links persist with regards to milk productivity indices on normal lactation. Very weak and weak negative correlative links were revealed between the coefficient of reproductive capacity of cows and the amount of milk on normal lactation in all investigated populations.
Key words: Cows populations; Moldovan Black-Motley type; Holstein breed; Correlation; Reproduction indices.
Rezumat. Articolul prezintă rezultatele investigării principalilor indici de reproducție la populațiile de vaci autohtone (Bălțată cu Negru de tip moldovenesc) și de import (Holstein de origine olandeză). Indicii de reproducție la efectivul de vaci de rasa Bălțată cu Negru de tip moldovenesc sunt net superiori comparativ cu populațiile de vaci Holstein de import. Perioada de serviciu corelează foarte puternic pozitiv cu durata intervalului dintre fătări, foarte puternic negativ cu coeficientul capacității reproductive a vacilor și foarte slab pozitiv cu durata lactației. Persistă legături corelative pozitive și parțial negative foarte slabe în ceea ce privește relația dintre perioada de serviciu și indicii productivității de lapte pe lactația normală. La toate populațiile investigate se evidențiază legături corelative negative foarte slabe și slabe ale coeficientului capacității reproductive a vacilor cu cantitatea de lapte per lactație normală.
Cuvinte-cheie: Populații de vaci; Tipul Bălțat cu Negru Moldovenesc; Holstein; Corelații; Indici de reproducție.
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