The Effect of Lactose Supplementation and Source on Feed Intake and Production Characteristics of Laying Hens

Gleaves, Earl W.; Salim, Ali Ali

doi:10.3382/ps.0612390

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…The results also showed that addition of probiotic, lactose or a combination of both could not significantly influence bone physical parameters. Obviously, it was expected the hens received CaL treatment had higher tibia ash, because of increasing calcium absorption, but Gleaves and Salim () showed significant interaction effects between lactose and calcium levels. In contrast, results founded by Kim et al.…”

Section: Discussionmentioning

confidence: 99%

Effect of calcium with and without probiotic, lactose, or both on organ and body weights, immune response and caecal microbiota in moulted laying hens

Dastar

Khosravi

Boldajie

et al. 2015

Animal Physiology Nutrition

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A total of 72 laying hens were used to investigate the effect of probiotic and lactose on body weight loss, tibia ash, antibody production against sheep red blood cell (SRBC), heterophile-to-lymphocyte (H/L) ratio and gut microbiota in a common moulting method for 14 d. Hens were randomly allocated to 6 experimental groups consisting of (i) full feed (FF), (ii) feed withdrawal (FW), (iii) FW with calcium (Ca), (iv) FW with Ca and offering 7 g/lit lactose in drinking water (CaL), (v) FW with Ca and offering 1 g/lit probiotic in drinking water (CaP), and (vi) FW with Ca and offering a mixture of lactose and probiotic in drinking water (CaLP). The results showed body weight loss in all FW groups were more than 25% that was significantly higher than FF group (p < 0.05). The relative organ weights of hens in FW groups were lower than FF group; especially, it was significant for liver and ovary (p < 0.05). No significant difference was observed between all groups for tibia ash. The highest H/L ratio was related to FW group and offering Ca and lactose numerically and probiotic alone significantly resulted in decrease of this ratio (p < 0.05). The results also showed no significant difference for antibody production against SRBC among experimental groups. The highest coliform bacteria numeration observed in FW group and lactose could significantly reduce this population (p < 0.05). Lactic acid bacteria (LAB) numeration demonstrated a significant difference among treatments, so that FF hens had higher LAB than others (p < 0.05). In addition, FW moulted hens had significantly lower LAB compared to other moulted hens (p < 0.05), except for Ca group. In conclusion, probiotic and lactose was effective in maintaining caecal microbiota balance and improving immunity in hens exposed to moulting.

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Section: Discussionmentioning

confidence: 99%

Effect of calcium with and without probiotic, lactose, or both on organ and body weights, immune response and caecal microbiota in moulted laying hens

Dastar

Khosravi

Boldajie

et al. 2015

Animal Physiology Nutrition

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show abstract

“…This disagreement may be related to use of higher levels of lactose (2.5%) and whey (3.85%) compared with 2%level of lactose and 3% whey which were employed in the current experiment. Gleaves and Salim (1982) reported that, less than 2% lactose level is needed to demonstrate its beneficial effect.…”

Section: Performance Characteristicsmentioning

confidence: 99%

Influence of Dietary Lactose and Dried Whey on Performance, Intestinal Microbiology, Villi Height and Some Blood Constituents in Broiler Chicks

Soliman

Mostafa

2007

Journal of Animal and Poultry Production

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An experiment was conducted to study the effect of lactose and dried whey on performance of broiler chicks, some blood constituents, intestinal microflora and intestinal villi length. Three hundred day old Ross broiler chicks were allocated into five groups of 60 birds each. For 5 weeks, four groups of birds were fed on a basal diet supplemented with 1 and 2% lactose or 1.5 and 3% dried whey while the fifth group was control. Body weight gain of chicks at 5 week of age were increased by adding lactose or whey into diets, furthermore the increments were significant at high level of lactose (2%) or whey (3%). Feed conversion ratios (g. feed/g. gain) of chicks fed dietary whey or lactose were better than control at 5 week of age.Microbiological examination of ileal contents showed that addition of lactose or dried whey cause a huge increase in lactobacilli bacteria was detected. As well, a reduction in total Aerobic, E. coli and Enterococcus bacteria. Dried whey was less effective than pure lactose in stimulating Lactobacilli bacteria. Ileal villi were higher in birds fed dietary lactose or whey than control. There is no significant effect of lactose or whey on weight of liver or immunity organs. As well as, blood total protein, albumin, or globulin were not affected. The result of immune organs and globulin may indicate to the lack effect of lactose or whey on immune function. Blood cholesterol and total lipids were not influenced by treatments. It can be suggested that, the improvement effect of lactose and whey on performance of broiler chicks, may be related to their role in stimulating the proliferation of lactobacilli bacteria which excluding intestinal pathogens that may cause malabsorption and health disorders. As well, feeding lactose and dried whey cause an increase in intestinal villi height which enhances nutrients absorption and utilization. The effectiveness of dried whey in promoting the growth of broiler is similar to lactose, therefore; dried whey may be used as alternative prebiotics for lactose.

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Transgenic Chickens Expressing β-Galactosidase Hydrolyze Lactose in the Intestine

Mozdziak

Pophal

Borwornpinyo

et al. 2003

The Journal of Nutrition

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Chickens do not possess the necessary enzymes to efficiently hydrolyze lactose into glucose and galactose. The bacterial enzyme beta-galactosidase can convert lactose into glucose and galactose. Transgenic chickens that carry the E. coli lacZ gene and express beta-galactosidase could potentially utilize lactose as an energy source. The objective of this study was to determine the ability of the transgenic chicken small intestinal mucosa to hydrolyze lactose into glucose and galactose. Lactase activity was examined in the intestinal muscosa from wild-type chickens and two lines of chickens that carry the lacZ gene and express beta-galactosidase. Lactase activity was significantly higher in both transgenic lines compared with wild-type birds (P < 0.05). The presence of the beta-galactosidase enzyme was revealed by X-gal staining in the intestine of transgenic chickens, whereas it was not present in the wild-type chickens. Overall, it appears that inserting the lacZ gene, which encodes beta-galactosidase, has resulted in a chicken that can utilize lactose as an energy source. This study demonstrates that transgenic technology can be used to modify nutrient utilization in domestic poultry.

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The Effect of Lactose Supplementation and Source on Feed Intake and Production Characteristics of Laying Hens

Cited by 6 publications

References 17 publications

Effect of calcium with and without probiotic, lactose, or both on organ and body weights, immune response and caecal microbiota in moulted laying hens

Effect of calcium with and without probiotic, lactose, or both on organ and body weights, immune response and caecal microbiota in moulted laying hens

Influence of Dietary Lactose and Dried Whey on Performance, Intestinal Microbiology, Villi Height and Some Blood Constituents in Broiler Chicks

Transgenic Chickens Expressing β-Galactosidase Hydrolyze Lactose in the Intestine

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