Group Title: Animal husbandry and nutrition mimeograph series - UF Dept. of Animal Husbandry and Nutrition ; no. 59-9
Title: Effect of fall fertilization and harvest date of coastal Bermudagrass hay on heifer performance
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Permanent Link: http://ufdc.ufl.edu/UF00072883/00001
 Material Information
Title: Effect of fall fertilization and harvest date of coastal Bermudagrass hay on heifer performance (a summary of research results to date on projects in progress)
Physical Description: 2 leaves : ; 28 cm.
Language: English
Creator: Alexander, Robert Allen, 1933-
University of Florida -- Dept. of Animal Husbandry and Nutrition
Publisher: Florida Agricultural Experiment Station, Dept. of Animal Husbandry and Nutrition
Place of Publication: Gainesville, Fla.
Publication Date: 1959
 Subjects
Subject: Heifers -- Feeding and feeds -- Florida   ( lcsh )
Bermuda grass -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
General Note: Caption title.
General Note: "April - 1959."
Funding: Animal husbandry and nutrition mimeograph series - UF Dept. of Animal Husbandry and Nutrition ; no. 59-9
Statement of Responsibility: R.A. Alexander ... et al..
 Record Information
Bibliographic ID: UF00072883
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 76966885

Full Text



Animal Husbandry and Nutrition
Mimeograph Series No. 59-9


Florida Agricultural
Experiment Station
Gainesville, Florida
April 1959


EFFECT OF FALL FERTILIZATION AND HARVEST DATE
OF COASTAL BERMUDAGRASS HAY ON HEIFER PERFORMANCE
(A Summary of Research Results to date on Projects in Progress)

R. A. Alexander, J. F. Hentges, Jr., H. W. Lundy, Nathan Gammon & W. G. Blue



This experiment was conducted to answer these questions:

1. Can Good Quality Bermudagrass hay be made in the fall
after the rainy season ends?

2. What effect does a harvest date after frost have on the
nutritive value of Bermudagrass cut for hay?

3. What effect will an increase in rate of nitrogen ferti-
lization from 50 to 100 Ibs. per acre have on the nutritive
value of Bermudagrass cut for hay?

4. Can long yearling heifers be wintered on Bermudagrass hay
and minerals In a dry lot without impairing their growth
and ability to breed at the end of the wintering period?

5. What method of measuring the nutritive value of forages Is
best?

RESULTS OF FEEDING TRIALS
CATTLE TREATMENTS (1957 and 1958):
Lot 1. Fed BFIO0 hay Cut befcte fost,.100 Ibs..pIfrtten-fertillzer
Lot 2. Fed AFI00 hay after ", "
Lot 3. Fed BF50 hay before 50 "
Lot 4. Fed AF50 hay after "


HAY COMPOSITION:
BF100
Crude protein (N x 6.25) 8.2
Crude fiber 33.3
Ash 4.9
Gross energy (calories /lb.) 1925
Dry matter yield (lb./acre) 3658

Digestible protein (Ib./cwt.) 4.6
Digestible calories (Ib./cwt.) 1030
Digestible calories digestible protein
ratio* 224:1


AFIOO
6.1
35.6
3.7
1930
3515

3.4
1040

306:1


BF50
6.2
32.7
4.6
1893
2829

2.9
990

339:1


AF50
4.6
35.1
3.6
1925
2050


*Calories of digestible energy to 1% digestible protein.





-2-


LOT NO, & TREATMENT
I 2 3 4
BFI00 AFIOO BF50 AF50
No. heifers per lot 5 5 5 5
Days on experiment 70 70 70 70
Av. initial wt., Ibs. 724 728 728 721
Av. daily gain or loss Ibs. 0.7 0.4 0.6 -0.7
Av. daily hay intake, Ibs. 17.2 16.9 16.5 13.9
Av. daily mineral Intake, 0.5 1.4 0.6 2.5
No. showing estrus 5 5 5 5

HAY COMPOSITION (1958)

BFIOO AFIO0 8F50 AF50
Crude protein 8.9 7.6 7.4 6.5

Dry matter yield (Ib./acre) 5245 5430 4790 4450


1958 HEIFER FEEDING TRIAL LOT NO. & TREATMENT
1 2 3 4
BFIO0 AFIOO BF50 AF50

No. heifers per lot 4 4 4 4
Days on experiment 112 112 112 112
Av. Initial wt., Ibs. 696 730 715 706
Av. daily gain or loss, Ibs. 0.4 0.2 0.2 -0.3
Av. daily hay intake, lbs. 15.1 15.6 15.5 12.5
No. showing estrus 4 4 4 4

DISCUSSION OF RESULTS

1. Good quality Bermudagrass hay with a crude protein content over 6%
can be made after the rainy season ends (usually October) in North
and Central Florida.

2. Late cut (after frost) hay was 25% lower In protein, 7% higher In
fiber, and 25% lower in ash. Poor cattle performance reflected these
decreases In quality of hay cut after frost.

3. Increasing the rate of nitrogen fertilization from 50 to 100 lbs. per
acre Increased both yield and crude protein content. Weight changes
and hay intake of the heifers Illustrate this advantage. It is Im-
portant that the nitrogen be applied before September Ist.

4. Long yearling heifers breeding ability was not affected by the low
nitrogen-fertilized hay cut after frost. Although these heifers lost
an average of 0.7 Ib./day, they were all pregnant at the end of the
breeding season.
5. In our opinion, the only feed analyses needed are for nitrogen (Kjeldahl
method) and calorie content (Bomb calorimeter method). These may be con-
verted to protein (nitrogen times 6.25) and TDN (total digestible nutri-
ents) or DE (digestible energy)or may be used directly In formulating the
nitrogen (protein) and energy needs of ruminants.




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