摘要:

The description of the processes of absorption of free fatty acids in monogastric animals and in ruminants is the first part of the review. The feeding problems of free fatty acids are discussed in the second part.

ISSN:0003-942X    

DOI:10.1080/17450399409381772

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The energy availability from the feedstuffs and the energy requirement of animals are characterized by the metabolizable energy. The metabolizable energy of the feed (feedstuff, ration) is interpreted as potential energy.

ISSN:0003-942X    

DOI:10.1080/17450399409381773

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

36 male rats with a life mass of 48±2g were distributed among a depletion, a pair fed and an ad libitum control group. The depletion animals were fed with a Zn‐deficient diet having a Zn content of 1 mg/kg. For the control and pair fed animals the diet was subsituted with 70 mg Zn/kg diet. The duration of the treatment was 20 days. As parameters the concentrations of different fatty acids in liver and brain was determined. The concentrations of the determined fatty acids in the liver were influenced markedly by the food consumption and in a smaller extend by the Zn supply. In the brain the concentrations of 18: 0, 18: 1, 18: 2, 18: 3, 20: 0, 22: 0, 22: 4, 22: 6, 24: 0 and 24: 1 were higher in Zn‐depleted animals in comparison to the ad libitum control animals. The contents of these fatty acids were usually between the two groups. The concentration of the residual fatty acids were not different between the treatment groups.

ISSN:0003-942X    

DOI:10.1080/17450399409381774

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

In two growth experiments on broilers of 6 to 27 days of age, the biological efficacy of three L‐lysine preparations containing biomass was evaluated in comparison to L‐lysine‐ HCl. L‐lysine from the different sources was added in graded levels to a basal diet deficient in lysine, but adequate in all other nutrients.

ISSN:0003-942X    

DOI:10.1080/17450399409381775

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Feeding 2‐weeks old broiler chicks on gibberellic acid (GA3)‐containing diets (0, 1, 5, 25 and 125 ppm) for 3‐weeks led, generally, to nonsignificant increase of body weight, decreased feed consumption and better feed conversion (on 25–125 ppm). Yet, the percentages of the carcass and the other organs (liver, gizzard, heart) and glands (adrenal, thyroid and pituitary) weights were lower comparing with the control (0 level). Blood protein and magnesium concentrations raised significantly. Blood glucose increased but not significantly. There was remarkable decrease (P≤.01) in transaminases activity. The muscular protein decreased, whereas the fat percentage significantly increased. The bone reflected lower density and mineral (calcium, magnesium and phosphorus) contents. GA3led to numerous histological lesions in different organs. Two‐weeks withdrawal period did not ameliorate the negative effects of GA3‐inclusion whether on the dressing percentages, blood picture, or on the muscles and bone constituents.

ISSN:0003-942X    

DOI:10.1080/17450399409381776

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The addition of Na‐lactate (50–150 mmol/1) to media with glucose had only marginal effect on the growth of rumen lactate‐producing bacteria at pH between 6.5 and 5.8.Butyrivibrio fibrisolvenswas somewhat more sensitive to external lactate thanStreptococcus bovis, Lactobacillus fermentumandSelenomonas ruminantium.It can be concluded that rumen lactate producers, which proliferate at the onset of rumen lactic acidosis, are not influenced by the lactate accumulation, except some non‐specific osmotic effects.

ISSN:0003-942X    

DOI:10.1080/17450399409381777

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Six adult sheep were fed at maintenance level, successively over three experimental periods, 1100 g of a roughage‐rich diet without supplement or containing 33 mg kg−1of lasalocid or cationomycin. The feed was administered in eight equal meals daily, every three hours. Blood samples were taken in each animal from the jugular vein at 10.00 hours, 16.00 and 22.00 hours, one hour after the animals were fed.

ISSN:0003-942X    

DOI:10.1080/17450399409381778

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Artificially dried ryegrass, untreated and ammonia‐treated wheat straw were ground and incubated in nylon bags in the rumen of three sheep each fed with diets based on roughage or concentrate. Dry matter degradability, the concentration and the release of the trace elements Cu, Fe, Mn and Zn from the incubated feeds were measured after 0 (washing loss), 6, 12, 24, 48 and 72 h rumen incubation time.

ISSN:0003-942X    

DOI:10.1080/17450399409381779

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

ISSN:0003-942X    

DOI:10.1080/17450399409381771

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor