조사료원 종류가 거세 염소(Capra hircus)의 영양소 소화율 및 온실가스 발생량에 미치는 영향 Nutrient Digestibility and Greenhouse Gas Emission in Castrated Goats (Capra hircus) Fed Various Roughage Sources원문보기
The objective of this study was to determine the effect of various roughage sources on nutrient digestibility and enteric methane ($CH_4$), and carbon dioxide ($CO_2$) production in goats. Four castrated black goats ($48.5{\pm}0.6kg$) were individually housed in envi...
The objective of this study was to determine the effect of various roughage sources on nutrient digestibility and enteric methane ($CH_4$), and carbon dioxide ($CO_2$) production in goats. Four castrated black goats ($48.5{\pm}0.6kg$) were individually housed in environmentally controlled respiration-metabolism chambers. The experiment design was a $4{\times}4$ balanced Latin square design with 4 roughage types and 4 periods. Alfalfa, tall fescue, rice straw, and corn silage was used as representative of legume, grass, straw, and silage, respectively. Dry matter digestibility was higher (p < 0.001) in corn silage than in alfalfa hay. Dry matter digestibility of alfalfa hay was higher than those of tall fescue or rice straw (p < 0.001). Neutral detergent fiber digestibility of tall fescue was lower (p < 0.001) than those of alfalfa, rice straw, or corn silage. Daily enteric $CH_4$ production and the daily enteric $CH_4$ production per kilogram of $BW^{0.75}$, dry matter intake (DMI), organic matter intake (OMI), digested DMI, and digested OMI of rice straw did not differ from those of tall fescue but were higher (p < 0.001) than those of alfalfa or corn silage. Roughage type had no effect on enteric $CO_2$ emission in goats. Straw appeared to generate more enteric $CH_4$ production than legume or silage, but similar to grass.
The objective of this study was to determine the effect of various roughage sources on nutrient digestibility and enteric methane ($CH_4$), and carbon dioxide ($CO_2$) production in goats. Four castrated black goats ($48.5{\pm}0.6kg$) were individually housed in environmentally controlled respiration-metabolism chambers. The experiment design was a $4{\times}4$ balanced Latin square design with 4 roughage types and 4 periods. Alfalfa, tall fescue, rice straw, and corn silage was used as representative of legume, grass, straw, and silage, respectively. Dry matter digestibility was higher (p < 0.001) in corn silage than in alfalfa hay. Dry matter digestibility of alfalfa hay was higher than those of tall fescue or rice straw (p < 0.001). Neutral detergent fiber digestibility of tall fescue was lower (p < 0.001) than those of alfalfa, rice straw, or corn silage. Daily enteric $CH_4$ production and the daily enteric $CH_4$ production per kilogram of $BW^{0.75}$, dry matter intake (DMI), organic matter intake (OMI), digested DMI, and digested OMI of rice straw did not differ from those of tall fescue but were higher (p < 0.001) than those of alfalfa or corn silage. Roughage type had no effect on enteric $CO_2$ emission in goats. Straw appeared to generate more enteric $CH_4$ production than legume or silage, but similar to grass.
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문제 정의
The objective of this study was to determine the effect of various roughage sources on nutrient digestibility and enteric CH4 and CO2 production in goats. In conclusion, rice straw which contains high NDF:NFC generated more enteric CH4 gas emission than those of alfalfa hay or corn silage, but similar to grass.
Although there were some attempts to determine the effect of roughage type on enteric GHG production in cows and beef cattle, more in vivo work in goats is needed. Therefore, the objective of this study was to determine the effect of various roughage sources on nutrient digestibility and enteric CH4 and CO2 production in goats using whole-body respiration-metabolism chamber system.
제안 방법
, USA). The model included roughage type as a fixed effect with animal and period as a random effect. Differences among least squares means were tested using the PDIFF option with Tukey’s adjustment.
이론/모형
Amylase-treated neutral detergent fiber (NDF) was determined with the method of Mertens (Mertens, 2002) using sodium sulfite and heat stable α-amylase (Sigma-Aldrich, Steinheim, Germany). Acid detergent fiber (ADF) was measured according to the methods of Van Soest et al. (Van Soest et al., 1991). Neutral detergent insoluble CP was determined according to the method of Licitra et al.
All roughages and frozen fecal samples were dried at 60°C in a forced air oven for 48 h and ground to pass a 1-mm Wiley mill screen. All samples were analyzed in duplication for crude protein (CP), ether extract (EE), and ash contents using AOAC methods (AOAC International and Cunniff, 1995). Amylase-treated neutral detergent fiber (NDF) was determined with the method of Mertens (Mertens, 2002) using sodium sulfite and heat stable α-amylase (Sigma-Aldrich, Steinheim, Germany).
Amylase-treated neutral detergent fiber (NDF) was determined with the method of Mertens (Mertens, 2002) using sodium sulfite and heat stable α-amylase (Sigma-Aldrich, Steinheim, Germany).
Differences among least squares means were tested using the PDIFF option with Tukey’s adjustment.
성능/효과
In conclusion, rice straw which contains high NDF:NFC generated more enteric CH4 gas emission than those of alfalfa hay or corn silage, but similar to grass.
001) daily enteric CH4 production and daily CH4 production per unit of nutrient intake and digested nutrient intake than legume or silage feeding group. These results could be assumed that the high NDF:NFC ratio of straw increase the enteric CH4 production for goats. Therefore, the straw feeding group produced more enteric CH4 gas production than legume or silage feeding group, but it had a similar amount of enteric CH4 production to the grasses group.
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