High Efficiency and APF Concentrates in the Ration of the Laying Fowl

Skinner, J. D.; Quisenberry, J. H.; Couch, J. R.

doi:10.3382/ps.0300319

Cited by 26 publications

(12 citation statements)

References 8 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vitamin B 12 increased (p<0.01) egg weight, data similar to those were reported by Skinner et al (1951) and Squires & Naber (1992), which demonstrated the importance of vitamin B 12 supplementation. Egg mass, feed intake and feed conversion were not affected (p>0.05) by vitamin B 12 supplementation.…”

Section: Performancesupporting

confidence: 87%

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production

Kato

Bertechini

Fassani

et al. 2003

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

The supplementation of cobalt and vitamin B 12 in diets for commercial laying hens on the second production cycle was studied. Four hundred and eighty light commercial laying hens, Lohmann LSL, were used at initial phase of forced molting laying period. The trial was conducted in a randomized design. The plots were the treatments which were constituted by combination of five cobalt levels (0.00; 0.30; 0.60; 0.90 and 1.20ppm) and two vitamin B 12 levels (without and with 10µ/kg) , and the split-plots were four periods (21, 42, 63 and 84 days) during the second period of production, with 4 repetitions and 12 hens per experimental unit. Food and water were provided ad libitum and eggs were collected twice daily. Performance and egg quality parameters were evaluated. At the end of experimental period, two layers from each treatment were slaughtered, and liver and blood samples were taken for analysis. Performance and egg quality were not different (p>0.05) among cobalt supplementation levels, although egg damage data were different (p<0.05). Supplementation with vitamin B 12 decreased egg weight. No influence of cobalt or vitamin B 12 supplementation was seen on the concentration of cobalt in the liver and yolk as well as on blood analysis (hematrocrit, hemoglobin, erythrocytes, and leukocytes). The results revealed that vitamin B 12 supplementation was important for commercial laying hens on the second cycle of production, but not cobalt supplementation.

show abstract

Section: Performancesupporting

confidence: 87%

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production

Kato

Bertechini

Fassani

et al. 2003

Rev. Bras. Cienc. Avic.

View full text Add to dashboard Cite

show abstract

“…Singsen, Matterson and Kozeff (1952) reported that hens fed a high corn diet (61.25%) required as much as 13 percent less feed per dozen eggs, were slightly heavier in body weight, and tended to have a higher rate of production than hens fed a corn-oatsmiddlings ration. Skinner, Quisenberry and Couch (1951) obtained similar results and also found that larger eggs were produced on a high-efficiency ration than on a conventional breeder mash. Hill, Anderson and Dansky (1956) reported that increasing energy intake resulted in greater efficiency of, and increased egg production during the winter months.…”

Section: Introductionsupporting

confidence: 85%

Effect of Energy Level and Laying House Temperature on the Performance of White Leghorn Pullets

et al. 1960

View full text Add to dashboard Cite

“…Gish et al (1948), Skinner et al (1951), Johnson (1954), and Crawford et al (1967) were unable to improve egg production by supplementing practical diets for laying hens with choline. Balloun (1956) conducted two experiments to determine whether the level of dietary fat influenced the choline requirement of laying hens.…”

mentioning

confidence: 96%

The Effect of Choline Supplementation of Diets for Growing Pullets and Laying Hens

et al. 1971

View full text Add to dashboard Cite

A CHOLINE deficiency is readily produced in chicks by feeding a diet low in choline or certain choline precursors. The effect of choline deficiency in laying hens, however, is less clear. McCollum et al. (1912) fed a diet containing 70 parts ground polished rice previously extracted with hot alcohol and 30 parts of dried skimmed milk to laying hens and found that more lecithin was present in eggs produced by these hens than had been consumed in the diet. Therefore, these investigators concluded that large amounts of lecithin were synthesized by laying hens.Abbott and DeMasters (1940), using a diet similar to McCollum's supplemented -with other vitamins, found that addition of choline to this basal diet increased egg production, prevented weight loss, and reduced liver fat.When diets have been studied which were low in methionine and vitamin B 12 , good responses were obtained from the addition of choline to diets for laying hens. Welch and Couch (1955) showed that a basal diet low in B i2 and methionine was improved by the addition of choline, provided that homocystine was present. Vitamin B 12 and homocystine supplementation would also improve this diet.Burns and Ackerman (1955) reported that choline deficiency in the laying hen <:ould be produced in the absence of dietary at Columbia University Libraries on March 24, 2015

show abstract

High Efficiency and APF Concentrates in the Ration of the Laying Fowl

Cited by 26 publications

References 8 publications

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production

Effect of Energy Level and Laying House Temperature on the Performance of White Leghorn Pullets

The Effect of Choline Supplementation of Diets for Growing Pullets and Laying Hens

Contact Info

Product

Resources

About