Ruminal degradability characteristics of different forages in sheep

doi:10.11686/cyxb20140232

Abstract

Abstract: In order to investigate dry matter (DM) and protein (CP) degradation rule of different forages, three Dorper×Han crossbred male sheep fitted with permanent rumen fistula were selected to estimate DM and CP ruminal degradability of 13 forages in situ. The results showed as follows: ruminal degradability at various time points of DM and CP of Medicago sativa were highest; Astragalus adsurgens, Setaria viridis, Arrhenatherum elatius and Poa pratensis were significantly higher than others at 72 hours (P<0.05). For 13 forages, potential degradation part and effective degradability of DM showed the similar change law with degradability at various time points of DM. CP effective degradability of leguminosae M. sativa and A. adsurgens were highest; gramineae A. elatius, Pennisetum purpureum, P. pratensis and S. viridis were significantly higher than others (P< 0.05). The rate constant for the slow degradation part of M. sativa was significantly higher than other forages (P<0.05). In conclusion, DM and CP ruminal degradability of leguminosae M. sativa and A. adsurgens were higher than gramineae pasture; gramineae A. elatius, P. pratensis, P. purpureum and S. viridis were higher than other 7 forages; Poa crymophila, Elymus sibiricus, Leymus chinensis and Elymus dahuricus were in the middle; Achnatherum splendens, Festuca sinensis and Phragmites australis were low.

CLC Number:

S816.32

CHEN Xiao-lin, LIU Zhi-ke,SUN Juan, WANG Yue-chao, LI Yan-ling, JIANG Cheng-gang, TU Yan, DIAO Qi-yu. Ruminal degradability characteristics of different forages in sheep[J]. Acta Prataculturae Sinica, 2014, 23(2): 268-276.

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