The Response of Leaf and Stem Fractions of Green Panic (Panicum maximum JACQ. var. trichoglume EYLES) Hay to Ammoniation

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  • アンモニア処理グリーンパニック(Panicum maximum JACQ var. trichoglume EYLES)乾草の部位別の栄養価値
  • アンモニア処理グリーンパニック(Panicum maximum Jacq.var.trichoglume Eyles)乾草の部位別の栄養価値〔英文〕
  • アンモニア ショリ グリーン パニック Panicum maximum Jac

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Abstract

Leaf to stem ratio and nutritive values of these plant fractions are the contribution factors to nutritive values in whole plant herbage. This experiment was conducted to determine the response of leaf and stem fractions of green panic (Panicum maximum JACQ. var. trichoglume EYLEs) hay to ammonia treatment. Each of leaf and stem fraction separated by airflow segregation procedure was treated with 2.6% anhydrous ammonia (dry matter basis) and stored for 25 days anaerobically. Ammoniated and untreated hays were offered to four sheep ad libitum to assess intake, digestibility and nitrogen balance. Ammoniated hay was higher in content of CP and lower in contents of NFE, NDF and lignin than untreated hay. Leaf fraction had a higher content of CP, lower of NDF, ADF and lignin than stem fraction. Ammonia treatment improved the digestibility of dry matter, CP and CF, and increased DCP and TDN contents in leaf fraction, but dry matter digestibility and TDN content of stem fraction did not change. Ammoniation increased the intake of dry matter, DCP and TDN, and improved nitrogen balance irrespective of plant fractions. From these results it is evident that the response to ammonia treatment differed among fractions of grass hay.

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