Cull onion disposal with sheep
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Cull Onion Disposal with Sheep. Thomas M. McBride County Extension Director. Current Project with Colorado Onion Association. The objectives are to determine if supple-menting cull onions to breeding ewes will:

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Cull onion disposal with sheep

Cull Onion Disposal with Sheep

Thomas M. McBride

County Extension Director


Current project with colorado onion association

Current Project with Colorado Onion Association

The objectives are to determine if supple-menting cull onions to breeding ewes will:

  • Alter hormonal profiles to increase ovulation or increase embryonic survival of lambs.

  • Affect blood mineral parameters and ultimately the immune system of the breeding ewes.

  • Simulate a flushing response.

  • Affect semen quality in breeding rams.


Experimental design

Experimental Design

A. 180 Rambouillet Ewes are randomly assigned to one of nine treatment groups.

1.Negative Control, ewes are not flushed - fed hay only for the duration of the trial.

2.Onions are used to flush ewes and then onions removed from diet and feed hay only for the duration of the trial.


Onion treatment

Onion Treatment


Onion treatment1

Onion Treatment


Onion treatment2

Onion Treatment


Nine treatment groups

Nine Treatment Groups

3.Onions are used to flush ewes and full-fed onions only till a week prior to lambing.

4.Corn used to flush ewes and then fed hay only for the duration of the trial.

5.Corn used to flush ewes and then hay/corn fed till a week prior to lambing.


Hay and corn treatment

Hay and Corn Treatment


Hay and corn treatment1

Hay and Corn Treatment


Hay and corn treatment2

Hay and Corn Treatment


Nine treatment groups1

Nine Treatment Groups

6.Corn used to flush ewes and then full-fed onions till a week prior to lambing.

7.Onions are used to flush ewes and then hay/corn fed till a week prior to lambing.

8.Ewes not flushed and full-fed onions till a week prior to lambing.

9.Ewes not flushed and hay/corn are fed till a week prior to lambing.


Hay treatment

Hay Treatment


Hay treatment1

Hay Treatment


Experimental design1

Experimental Design

B. Nine Rambouillet rams, three animals per gestation diet (hay versus hay/corn versus hay/onions), will be fedcorresponding diets and semen quality measured.


Experimental design2

Experimental Design

C.Base blood levels will be determined for packed cell volume (anemia), mineral profiles, LH and FSH levels prior to ovulation and progesterone during pregnancy. After the ewes are lambed, numbers of lambs born live and survivability will be measured. Fleece weight will also be weighed and recorded.


Disease pass through

Disease Pass Through

  • Sheep were fed white mold sclerotia for four days.

  • Fecal samples were collected from the treated ewe and a control ewe for four days.


Disease pass through1

Disease Pass Through

  • Samples were dried and analyzed for sclerotia.


Results

Results

One sclerotium was recovered on day four and passed through with no physical damage.


Conclusion

Conclusion

The thinner and more delicate Botrytis sclerotia from onions would probably not survive the feeding and chewing actions of sheep.


Onion analysis

Onion Analysis

  • Moisture90%

  • Crude Protein7.4 - 12.9

  • TDN %83 - 90

  • Calcium.31 - .54 (.35)

  • Phosphorus.34 - .52 (.40)


Previous ewe projects

Previous Ewe Projects

A.Drylot-

100%onions consumed

45 lb./day


Ewe study

Ewe Study

  • Group 1 - Onions After October 1

  • Group 2 - Onions Beginning September 10

  • Group 3 - Control - 4 lbs. Hay + 1 lb. Grain and Pasture

    FLEECE WEIGHT

    GroupFleece Weight

    19.82

    29.46

    39.42


Ewe study1

Ewe Study

  • Group 1 - Onions After October 1

  • Group 2 - Onions Beginning September 10

  • Group 3 - Control - 4 lbs. Hay + 1 lb. Grain and Pasture

    LAMBING PERCENTAGE

    Group Lambs Per Ewe

    11.654

    21.80

    31.65


Ewe study2

Ewe Study

  • Group 1 - Onions After October 1

  • Group 2 - Onions Beginning September 10

  • Group 3 - Control - 4 lbs. Hay + 1 lb. Grain and Pasture

    BODY CONDITION SCORE

    GroupInitial BodyFinal Body

    Condition ScoreCondition Score

    12.7653.573a

    22.8253.57a

    32.823.12b


Ewe study preliminary results

Ewe Study - Preliminary Results

  • Onions Fed Ewes Developed Severe

    Anemia by Week Two

  • Normal Packed Cell Volume (PCV) of Red

    Blood Cells is 35-40%

  • By Week Two Onion Fed Ewes 25-30%

  • By One Month Onion Fed Ewes Lows

    20’s %

  • By Six Weeks Anemia Had Reached a

    Plateau and Did Not Get Worse


Previous market lamb projects

Previous Market Lamb Projects

Thomas M. McBride

County Extension Director


Averages of the 50 onions 25 onions and controls

Averages of the 50% Onions, 25% Onions, and Controls


Return with feed costs @ 5 00 cwt

Return with Feed Costs @ $5.00 CWT


Return with feed costs @ 5 50 cwt

Return with Feed Costs @ $5.50 CWT


Carcass and weigh data

Carcass and Weigh Data


Dietary treatments

Dietary Treatments


Feeding cull onion rates

Feeding Cull Onion Rates

Feeding Cull Onion Rates from 0 - 100% of the Diet for the Last 75 Days of the Diet.

ADG IN POUNDS.

Control 25% 50% 75% 100%

.461 .266 .188 .049 (.0857)

-NO CHANGE IN FLAVOR-


After three week adjustment period

After Three Week Adjustment Period

Control 25% 50% 75% 100%

.461 .446 .367 .30 .15


Cull onions

Cull Onions


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