Protein bioavailability in four grazing pastures at different regrowth ages under phosphorus fertilization

Abstract:

The present investigation was carried out in the Laica University" Eloy Alfaro" of Manabí, El Carmen, Province of Manabí-Ecuador, in the premises of La Granja Experimental Río Suma, at km 30 of the Santo Domingo El Carmen highway. The objective was the in vivo digestibility of four grazing pastures (Panicum maximum cv. Tanzania, Panicum maximum cv. Mombaza, Brachiaria Brizantha cv. Xaraes, Brachiaria Brizantha cv. Marandú) under edaphic fertilization with triple superphosphate. A Latin design of 4 x 4 squares was used. A total of 4 rows (regrowth ages), 4 columns (sheep) and 4 treatments (grass varieties) were used. The factors under study were the age of cut or regrowth (20, 25, 30 and 35 days) and the grazing grass varieties with edaphic fertilization with triple superphosphate (Tanzania, Mombaza, Xaráes and Marandú) and the variable under study were: protein bioavailability. The digestibility of protein in grazing grasses under complementary fertilization with triple superphosphate showed positive effects, highlighting the Xaraes, Marandú and Mombaza varieties. Cutting age did not infer the digestible energy of the grasses.

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