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The present study evaluated the effects of different cutting height on nutritive value, fermentation quality, in vitro and in vivo digestibility of whole crop barley silage. Whole crop barley forage (Yuyeon hybrid) was harvested at height of 5, 10, and 15 cm from the ground level. Each cutting height was rolled to make round bale and ensiled for 100 days. After 100 days of ensiling, pH of silage was lower (p&lt;0.05) in 5 cm, but no difference between 10 and 15 cm of cutting height. The content of lactate and lactate to acetate ratio were increased (p&lt;0.05) in 5 cm of cutting height, whereas the acetate content was higher (p&lt;0.05) in 10 and 15 cm than that of 5 cm cutting height. Aerobic stability was greater (p&lt;0.05) in silages of 10 and 15 cm of cutting height. Three total mixed rations (TMR) were formulated with silages from the three different cutting heights (TMR5, TMR10, and TMR15) incorporated as forage at 70:30 ratio with concentrate (dry matter [DM] basis). In vitro dry matter digestibility was higher (p&lt;0.05) in the TMR5 and TMR10 than that in TMR15, whereas in vitro neutral detergent fiber digestibility was higher (p&lt;0.05) in the TMR10 and TMR15 than that in TMR5. Concentration of NH3-N was highest (p&lt;0.05) in the TMR10 followed by TMR15 and TMR5. Total volatile fatty acid was decreased (p&lt;0.05) with increased cutting height. The digestibility of DM and neutral detergent fiber were highest (p&lt;0.05) in TMR15, than those in TMR5 and TMR10, whereas acid detergent fiber digestibility was higher (p&lt;0.05) in TMR5 than that in TMR10. The results showed that increasing cutting height, at least up to 10 to 15 cm, of whole crop barley forage at harvest (Yuyeon) may be beneficial for making silage for TMR formulation and increasing digestibility of DM and NDF.

Effects of Different Cutting Height on Nutritional Quality of Whole Crop Barley Silage and Feed Value on Hanwoo Heifers