نتایج جستجو برای: reproductive efficiency
تعداد نتایج: 482044 فیلتر نتایج به سال:
The efficient production of milk drives the profitability of the dairy enterprise. Within a dairy herd, total milk production is determined by the proportion of cows producing milk at any given time and the level of milk production of the individual cows within the herd (Vandehaar, 1998). Both of these factors are dramatically affected by reproductive efficiency. Improving reproductive efficien...
The net economic value of reproductive efficiency in dairy cattle was estimated using a stochastic dynamic simulation model. The objective was to compare the economic consequences of reproductive performance scenarios ("average" and "poor") of a cow having a good reproductive performance and to explore which reproductive factors have an important impact on economic efficiency. A "good" reproduc...
This study was carried out investigate the effect of slow-release blous on reproductive efficiency, twinning and weaning weight. 306 female Cashmere Raeini goats were selected randomly and divided into eight treatments. Treatments were: 1and 2) control with and without injection eCG, 3 and 4) Consumption one slow-release blolus with and without injection eCG, 5 and 6) Consumption two slow-rele...
A major role of the dairy cow is to convert low-quality plant materials into high-quality protein and other nutrients for humans. We must select and manage cows with the goal of having animals of the greatest efficiency matched to their environment. We have increased efficiency tremendously over the years, yet the variation in productive and reproductive efficiency among animals is still large....
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