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Effects of urea treatment on chemical composition and in vitro digestibility of meadows hays of Northern Portugal

, : Effects of urea treatment on chemical composition and in vitro digestibility of meadows hays of Northern Portugal. Animal Feed Science and Technology 25(1-2): 157-167

Samples of 250 g of 2 meadow hays (H1 and H2) were sprayed with urea solution to increase the moisture content up to 400 g/kg. Urea was applied at 60 g/kg and the samples were stored in sealed plastic bags at 25 degrees C for 3, 6, 9, 45 and 60 days. Unhydrolysed urea, changes in chemical composition, in vitro cell wall digestibility (IVNDFD) and in vitro organic matter digestibility (IVOMD) were measured. The hydrolysis of urea was extensive and increased (P<0.001) by treatment time.

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