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Food value of straw meal in the nutrition of pigs. 1. Digestibility of the nutrients and N-balance after feeding with partially hydrolized straw meal



Food value of straw meal in the nutrition of pigs. 1. Digestibility of the nutrients and N-balance after feeding with partially hydrolized straw meal



Archiv für Tierernahrung 29(2): 119-128



Straw Meal was mixed with concentrated HCl at a mass proportion of approximately 10 : 1. After a one-hour duration of action the mixture was diluted with water (in proporation to the added HCl volume the double amount of water) and steamed in an electric steaming caldron for one hour. The partially hydrolised final product was neutralised with calcium hydroxide (3,5 kg per 10 kg HCl). In a digestibility experiment 4 pigs were fed according to the differential method with barley (supplemented with lysine and methionine) without straw meal resp. with straw meal (717 g barley dry matter+386 g straw meal dry matter per animal and day for pigs with an average live weight of 64.3 kg). In this test 21.0% of the organic matter of partially hydrolised straw meal, 0.5% of the crude fibre and 42.3% of the N-free extractives were digestible. When the animals were fed with barley exclusively (1045 g dry matter per day and animal of an average body weight of 61,4 kg), 17,1% of the 26,0 t N per animal and day were excreted in feces. After the feeding with straw meal admixtures, 34,5% of the 20,9 g N per animal and day were excreted in feces. When the feed consisted of 1,99 kg barley, 220 g fish meal and 565 g straw meal (dry matter in each case) per animal and day for the same pigs with an average body weight of 97,1 kg a digestibility of the organic matter of the partially hydrolised straw meal of 24,6% was achieved. 24.3% of the nitrogen consumed (72.9 g) by each animal per day were excreted in feces. After slaughtering, the pH-value in the caecum sould be ascertained as 6.0 to 6.5. The conclusion of this is that partially hydrolised straw meal contains approximately 20% utilisable carbohydrates and has a positive dietic effect in the digestive tract.

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Accession: 040161615

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PMID: 475586


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