예취시기에 따른 Alfalfa , Orchar grass고정물의 소화율 , 발효율 및 발산속도 측정

Digestibility and fermentation rate or Alfalfa , Orchar grass with different cutting times

1. Alfalfa의 조단백질(粗蛋白質)은 채취시기가 경과함에 따라 1회(回) 19.64%에서 4회(回) 12.37%로 낮아졌으며, 조섬유, CWC, Cellulose도 낮아지는 경향을 보였다. Orchard grass도 조단백질(粗蛋白質)은 1회(回) 13.79%에서 2,3회(回) 12.97, 12.85%로 낮아졌으며 4회(回) 14.72%로 다소 상승하였다. 그밖에 조섬유, CWC는 채취시기가 진행됨에 따라 낮아졌으며 Cellulose는 시기에 다소 증가하였으나 그후 감소하였다. 2. Alfalfa와 Orchard grass의 DM과 Cellulose 소화율(消化率) Alfalfa의 채취시기별 DM 소화율은 1, 2, 3회(回) 51.80, 51.86, 52.92%로 별반 차이가 없었으나 4회(回) 59.52%로 가장 높았고 점차적으로 채취시기가 경과함으로써 증가하는 경향을 보였다. Cellulose 소화율은 3회(回) 시기에 감소하였다가 4회(回)에 약간 상승하였다. Orchard grass의 DM소화율은 1,2,3,4회(回)에 62.21, 66.10, 60.95, 66.32%로 2회(回) 채취초기에 소화율이 높아졌고 3회(回)에 다소 감소하였다가 4회(回)에 증가하였다. Cellulose 소화율은 Alfalfa와 마찬가지로 3회(回) 시기에 감소하였다가 4회(回)에 약간 상승하였다. 3. Alfalfa와 Orchard grass의 발효율(醱酵率) 및 발효속도(醱酵速度) 측정(測定) Alfalfa의 채취시기별로 볼 때 DM의 시간당 발효율은 1회(回)가 0.83%로 가장 높았으며 3, 4회(回)는 별반 차이가 없었다. 또한 Cellulose의 발효율(醱酵率)도 1회(回) 시간당(時間當) 1.29%로 가장 높았고 2,3회(回)에 감소하였다가 4회(回)에 다소 증가하였다. Orchard grass의 DM 소화속도(消化速度)는 1회(回)에서 4회(回) 1.42, 1.58, 1.60, 1.57%로 2.3회(回) 채취시에 빠른 경향을 보였으며 Cellulose는 2회(回)에 1.77%로 가장 높았다.

Chemical composition, dry matter and cellulose digestibilities and fermentation rates of alfalfa and orchard grass cut at different time were estimated in vitro method and the results summurized as follows: 1. Crude protein, crude fiber cwc and cellulose content of Alfalfa were decreassed as advancing cutting time. Crude protein, crude fiber and cwc content of Orchard grass were decreased as advancing cutting time up to 3 cutting, but crude protein was slightly increased at 4th cutting, crude fiber and cellulose content were higher at 2nd cutting, but decreased thereafter. 2. DM digestibility of Alfalfa was 51.80, 51.86, 52.92 and 59.52% at 1, 2, 3 and 4th cutting time, respectibly, thus slightly increased as advancing cutting time, and cellulose digestibility of Alfalfa was not much different with different cutting time. DM digestibility of Orchard grass was 62.21, 66.10, 60.95 and 66.32% at 1, 2, 3 and 4th cutting time, respectibly, and cellulose digestibility of Orchard grass was slightly increased at 3rd cutting time and then increased at 4th cutting time. 3. Fermentation rate of DM of alfalfa was the highest 1st cutting time (0.83%/hr.) and was not different at 3 and 4th cutting time. Cellulose fermentation rate of Alfalfa was the highest at 1st cutting time (1.29%/hr.), decreased at 2 and 3th and then increased at 4th cutting time. Fermentation rate of DM of Orchard grass was 1.42, 1.58, 1.60 and 1.57%/hr. and of cellulose was the highest at 2nd cutting time (1.77%/hr.)