Effect of triple super phosphate supplementation on degradability of rice straw and ammonia nitrogen concentration

Two way analysis of variance in duplicate were used to assess the degradability of rice straw with triple super phosphate (TSP: Ca (H2PO4)2·CaSO4·2H2O) as a source of phosphorous (P) at six levels (0, 2, 4, 6, 8 and 12 g/kg) for each of the five different incubation times (0, 6, 12, 24 and 48 h). The effects of P (TSP) levels and time were significant for in vitro dry matter and organic matter degradability. For NH3-N concentration in rumen fluid the effect of P and time were significant. For in vivo digestibility eight bucks average live weight 7.63 ± 0.19 kg were selected. The DM, ADF and OM digestibility were significantly higher in P group than control group. The digestibility of CP was higher in P group than control group. It can be concluded that P has an important role in ruminant digestion and metabolism. As low quality forages are deficit in P, supplementation of P can improve the low quality forages. Thus ruminants can proper utilize this low quality forages.