The performance traits reviewed were age at first calving milk yield lactation length dry period
calving interval and service period of Sahiwal cows.
After the preliminary restrictions and eliminations pertinent to each trait such as
calving interval of 300 d through 600 d, 276,573 cows remained that were born from 1998 to 2004 at lactation that calved from 2000 to 2010.
22, respectively while with
calving interval and service period exhibited similar pattern (0.
The longer service period does have negative influences on the milk yield and it needs to be shorten to decrease the
calving interval which is a requisite for efficient milk production (Talbot, 1994).
More typical ones are days from calving to first service and inter
calving interval.
This would also lead to longer periods from calving to conception and extended
calving intervals, it says.
SUCKLER beef profitability could be boosted by tight
calving intervals - with a little help from AI and a few extra minutes snatched during busy farming days.
However,
calving interval factor noticeably influenced 305-d milk yield of cows with lactation records in Node 5 (F=24.
It has been revealed that for the country as a whole the average
calving interval has crept up to 402 days - seven days more than in 1998 - and this trend has been mirrored in the regions.
Also at the St Asaph event was SRUC vet George Caldow, who said there was no biological barrier to cows achieving a 365-day
calving interval when suckling calves.
Calving interval has increased by 25 days since going organic, and is now running at 420 days.
Environmental and genetic factors affecting
calving interval and birth weight of Zebu cattle in southeastern Mexico.
