nutritional value of an extruded spent hen–soybean meal blend for pigs and ruminants this article has been written using the results of research by the authors in the field of animal nutrition. publication of the article in journal of the science of food and agriculture (jsfa) does not imply any endorsement by jsfa or the sci of the nature and methodology of the research or of the statements and opinions expressed herein, which are solely those of the authors

Autor: Mustafa, Arif F, Qiao, Shiyan Y, Thacker, Philip A, McKinnon, John J, Christensen, David A
Zdroj: Journal of the Science of Food and Agriculture; 1 September 2000, Vol. 80 Issue: 11 p1648-1654, 7p
Abstrakt: Two studies were conducted to determine the feeding value of an extruded spent hen meal–soybean meal (SHSB) blend (50:50 spent hen/soybean meal) for pigs and ruminants. In the first trial, 60 crossbred pigs were assigned to one of five dietary treatments in which 0, 25, 50, 75 or 100% of soybean meal was replaced by the SHSB blend as a protein source. Total tract nutrient digestibility coefficients (obtained using the indicator method) were determined using six barrows per treatment. Results showed that digestibility coefficients for dry matter, crude protein (CP) and gross energy were not affected (P > 0.05) by the inclusion of the SHSB blend in the diet and averaged 75.3, 74.3 and 74.0% respectively. Average daily gain during the growing period (22–54 kg) increased (P < 0.05) as the level of the SHSB blend increased to 50% of the supplementary protein. However, higher replacement levels reduced the average daily gain of growing pigs (quadratic effect P = 0.037). Inclusion of the SHSB blend had no effect on average daily gain during the finishing period (54–76 kg). Feed intake decreased linearly (P = 0.042) as the level of the SHSB blend in the diet increased. Consequently, feed conversion improved linearly (P = 0.001) in response to increased levels of the SHSB blend. Two ruminally fistulated cows were used in the second trial to determine the ruminal degradability of the SHSB blend relative to meat meal, canola meal and brewers' grains. Effective ruminal CP degradability of the SHSB blend was similar to brewers' grains, lower (P < 0.05) than canola meal and higher (P < 0.05) than meat meal. The estimated ruminal undegraded protein value for the SHSB blend, meat meal, canola meal and brewers' grains was 547, 593, 417 and 546 g kg−1 of CP, respectively. It was concluded that the SHSB blend could replace 50% of soybean meal during the growing period and 100% during the finishing period with no adverse effects on pig performance. The SHSB blend could serve as a source of both ruminal degraded and undegraded protein for ruminants. © 2000 Society of Chemical Industry
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