Effects of Early Weaning and Grazing Systems on Productivity of Spring and Fall-calving Cows PDF Download
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Author: Hebbie Thomas Purvis
Publisher:
ISBN:
Category :
Languages : en
Pages : 208
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Author: Hebbie Thomas Purvis
Publisher:
ISBN:
Category :
Languages : en
Pages : 208
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Author: Ronald Ray Scott
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ISBN:
Category :
Languages : en
Pages : 238
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Author:
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ISBN:
Category : Agriculture
Languages : en
Pages : 40
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Author: Melissa Dale Hudson
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Category :
Languages : en
Pages :
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Author: Morgan T. Grabau
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ISBN:
Category :
Languages : en
Pages : 60
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Due to the conversion of perennial pasture and hay land to cropland in the western corn belt region, alternative methods of cow/calf management are being used to decrease reliance on perennial forages. These include grazing corn residue and feeding cow/calf pairs in confinement. Previous research has shown that limit-feeding a diet of low-quality forage and energy-dense co-products to cows in confinement is cost effective. However, this strategy may limit the intake of the young calf and thus their performance. A study was conducted to evaluate the impacts of two alternative calf management strategies when pairs are in confinement, early weaning or creep feeding. The results suggest that providing a separate creep diet containing higher quality forage to the calf is a cost effective option as opposed to keeping cows and calves as pairs providing the limit fed diet containing low quality forage, or weaning calves early and feeding the cow and calf separately. Winter grazing of corn residue is a common practice, whereas grazing into spring is rare due to concerns about soil compaction and negative effects on subsequent crop yield. A study was conducted to evaluate the impacts of spring grazing and stocking density when targeting a grazing rate of consumption of 50% of the leaf and husk. The results suggest that grazing in the spring when the soil is thawed and wet results in negligible compaction. Increased stocking density in the spring when grazing corn residue does increase surface roughness and soil penetration resistance, but these effects were minimal. In fact, subsequent soybean yield was increased in a high yielding irrigated field due to grazing at both a normal and high stocking density in the spring. Combining confinement of cows with grazing residue may be a solution to maintain cow herds without utilizing perennial forages.
Author: Jennifer Marie Barker
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 226
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Author: Devin Lynn Broadhead
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 71
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The objectives of this research were to 1) evaluate the effects of late gestation supplementation, synchronization and creep feeding on cow and calf production traits 2) evaluate the pooled effects of 5 studies involving late gestation supplementation on cow and calf traits. Experiment 1 was a three year study conducted on 8 pastures at the Gudmundsen Sandhills Laboratory. Cows were assigned to 1 of 4 late-gestation supplementation treatments, postpartum progestin or control, and 1 of 2 creep feed treatments to make up a 4 x 2 x 2 factorial arrangement. Calves were followed through to slaughter. Experiment 2 involved 5 studies all conducted at the UNL Gudmundsen Sandhills Laboratory. Studies were pooled based on similar treatments of late gestation supplementation on dormant upland pasture or meadow and different weaning periods. Cow and calf data was analyzed for various traits. Within Experiment 1 all three levels of supplementation increased cow BW and BCS, while the non-supplemented decreased in both. Supplementation treatments did not affect reproductive efficiency such as calving date, calving rate, weaning rate or pregnancy rate. Synchronization had similar results as there were no effects on reproductive measures or calf BW. Supplementation to cows had no effect on calf production traits through slaughter. Creep feeding calves significantly increased calf BW at weaning, yield grade and 12th rib fat. However on a cost/ benefit analysis creep feeding under these conditions added no value on profitability. Different results were achieved with the larger data set of late gestation supplementation. The pooled analysis demonstrated significant effects from supplementation on cow pregnancy rate, adjusted calf BW at weaning but no effect on carcass characteristics. March systems had a higher average pair feed cost but lower cow replacement cost compared to May. The March calving system had higher average net returns based on 9 yrs of market data compared to a May calving system. These studies indicate the effect and importance of late gestation supplementation on cow and calf productivity in a spring calving herd. Cow-calf producers should carefully consider calving system utilization based on their unique production goals.
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 36
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Author: Heather Ann Richter
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 128
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Author: Erling Burstedt
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 106
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