In vitro dry matter digestibility (IVDMD %) and organic matter digestibility (IVOMD %) of steam treated rice straws, alfalfa hay and Chinese wild rye. AH, alfalfa hay; CWR, Chinese wild rye; TRS-I, rice straw treated with steam explosion at 15.5 kgf/cm2 for 90 sec; TRS-II, rice straw treated with steam explosion at 15.5 kgf/cm2 for 120 sec. abc Mean values that do not share a common letter are significantly different (P<0.05); n = 5. Values are presented as mean ±SE.