Utilization of fish protein hydrolysates in milk substitutes for lambs

Journal of Agricultural Science - Tập 93 Số 1 - Trang 37-46 - 1979
H. S. Soliman1, E. R. Ørskov1, Ian Mackie2
1Rowett Research InstituteBucksburn, Aberdeen A B2 9SB
2Torry Research StationAberdeen

Tóm tắt

SUMMARYMale and female (Suffolk × (Finnish Landraee × Dorset Horn)) lambs were used in three experiments to examine the replacement of milk by undried and dried fish protein hydrolysates (FPH), a mixture of lard and coconut fat, and partially hydrolysed starch (Protamyl 110). The animals received the experimental diets from 1 week of age in Expts 1 and 2, and from 4 weeks of age in Expt 3. They were given the diets in eight equal feeds (i.e. every 3 h) from an automated teat bar system. The level of feeding was 1·046 MJ/kg0−76/day. Experiments 1 and 2 lasted for 35 days, during which live-weight gain and food conversion ratios were recorded and at the end the digestibility of N, dry matter and starch was determined. Experiment 3 consisted of three small digestibility trials.In Expt 1, the replacement of milk protein with undried FPH and of milk fat with lard plus coconut fat had no significant effects on live-weight gain, food conversion ratio or nutrient digestibility. Somewhat lower gains for the lambs given the FPH than those given milk protein were observed during the first 15 days of the experiment. Apparent digestibility of milk protein and milk fat was 95 and 99% while that of PFH and lard plus coconut fat was 94 and 96% respectively. The replacement of milk fat with lard and coconut fat caused some reduction in live-weight gains and nutrient digestibility. Lactose was completely replaced by protamyl both in diets based on milk protein or FPH with no effect on live-weight gains or food conversion ratio.Apparent digestibility of fish protein was not affected by the drying process. Fat digestibility of diets containing undried or dried FPH ranged from 46 to 98% according to the type of emulsifier used. The results are discussed in relation to published data concerning the problems associated with the use of fish protein in milk replacers.

Từ khóa


Tài liệu tham khảo

Toullec, 1967, Fats in milk replacers: Their performance and quality control

10.3168/jds.S0022-0302(67)87616-1

10.1051/animres:19750208

Walker, 1975, The utilization by pre-ruminant lambs of milk replacers containing isolated soya bean protein, Journal of Agricultural Research, 26, 1025

10.1079/BJN19750023

Genskow, 1968, Observations on vitamin deficiencies in calves fed a milk replacer containing low-ash fish meal, Journal of Dairy Science, 51, 973

Soliman H. S. (1977). Replacement of milk protein, carbohydrate and fat in lamb milk substitutes. Ph.D. thesis, University of Aberdeen.

10.3168/jds.S0022-0302(75)84587-5

10.1177/036985646800500304

10.1079/BJN19520005

10.3168/jds.S0022-0302(59)90813-6

Theriez, 1974, Artificial rearing of lambs. 4. Comparisons of various crude protein sources used as milk powder substitutes, Annales de Zootechnie, 23, 325

Slade, 1965, Substitution of fish flour protein for skim milk protein in milk replacers for the young calf, Journal of Dairy Science, 48, 788

10.1039/an9729700562

10.1079/BJN19610067

10.3168/jds.S0022-0302(54)91276-X

Mackie, 1974, Proteolytic enzymes in recovery of protein-free fish waste, Process Biochemistry, 9, 12

10.1017/S0003356100016858

Thivend, 1965, Determination of starch with glucose amylase, Methods in Carbohydrate Chemistry, VI, 79

10.1051/animres:19740408

Van Weerden, 1974, 3rd European Symposium on the use of Fish Meal in Animal Feeding, 96

Toullec, 1974, 3rd European Symposium on the use of Fish Meal in Animal Feeding, 68

10.3168/jds.S0022-0302(71)85936-2

10.1079/BJN19640018

10.1039/an9709500181

Hodgson, 1960, Calf milk replacer studies. The effect of the physical state of added fat, Journal of Dairy Science, 43, 891

10.1002/jsfa.2740230413

10.3168/jds.S0022-0302(71)86023-X

10.1111/j.1471-0307.1964.tb02237.x

Thông tin
Thông tin xuất bản

Journal of Agricultural Science

Tập 93 Số 1

37-46

Thông tin tác giả